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vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">目錄</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">移去側欄</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">收埋</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">文頭</div> </a> </li> <li id="toc-公式" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#公式"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>公式</span> </div> </a> <ul id="toc-公式-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-聲學" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#聲學"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>聲學</span> </div> </a> <ul id="toc-聲學-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-睇埋" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#睇埋"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>睇埋</span> </div> </a> <ul id="toc-睇埋-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-註釋" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#註釋"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>註釋</span> </div> </a> <ul id="toc-註釋-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-引述" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#引述"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>引述</span> </div> </a> <ul id="toc-引述-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="目錄" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="開/收內容一覽" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">開/收內容一覽</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">頻率</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="去睇另一種語文嘅文章。有122種語言版本。" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-122" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">122種語言</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Frekwensie" title="Frekwensie – 南非荷蘭文" lang="af" hreflang="af" data-title="Frekwensie" data-language-autonym="Afrikaans" data-language-local-name="南非荷蘭文" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Frequenz" title="Frequenz – 德文（瑞士）" lang="gsw" hreflang="gsw" data-title="Frequenz" data-language-autonym="Alemannisch" data-language-local-name="德文（瑞士）" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Frecuencia" title="Frecuencia – 阿拉貢文" lang="an" hreflang="an" data-title="Frecuencia" data-language-autonym="Aragonés" data-language-local-name="阿拉貢文" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%B1%D8%AF%D8%AF" title="تردد – 阿拉伯文" lang="ar" hreflang="ar" data-title="تردد" data-language-autonym="العربية" data-language-local-name="阿拉伯文" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%AA%D8%B9%D8%A7%D9%88%D9%8A%D8%AF%D8%A9" title="تعاويدة – 摩洛哥阿拉伯文" lang="ary" hreflang="ary" data-title="تعاويدة" data-language-autonym="الدارجة" data-language-local-name="摩洛哥阿拉伯文" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Frecuencia" title="Frecuencia – 阿斯圖里亞文" lang="ast" hreflang="ast" data-title="Frecuencia" data-language-autonym="Asturianu" data-language-local-name="阿斯圖里亞文" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Tezlik" title="Tezlik – 亞塞拜然文" lang="az" hreflang="az" data-title="Tezlik" data-language-autonym="Azərbaycanca" data-language-local-name="亞塞拜然文" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%81%D8%B1%DA%A9%D8%A7%D9%86%D8%B3" title="فرکانس – South Azerbaijani" lang="azb" hreflang="azb" data-title="فرکانس" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%99%D1%8B%D1%88%D0%BB%D1%8B%D2%A1" title="Йышлыҡ – 巴什客爾文" lang="ba" hreflang="ba" data-title="Йышлыҡ" data-language-autonym="Башҡортса" data-language-local-name="巴什客爾文" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Frequenz" title="Frequenz – 巴伐利亞文" lang="bar" hreflang="bar" data-title="Frequenz" data-language-autonym="Boarisch" data-language-local-name="巴伐利亞文" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Tonk%C4%97nis" title="Tonkėnis – 薩莫吉希亞文" lang="sgs" hreflang="sgs" data-title="Tonkėnis" data-language-autonym="Žemaitėška" data-language-local-name="薩莫吉希亞文" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A7%D0%B0%D1%81%D1%82%D0%B0%D1%82%D0%B0" title="Частата – 白俄羅斯文" lang="be" hreflang="be" data-title="Частата" data-language-autonym="Беларуская" data-language-local-name="白俄羅斯文" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A7%D0%B0%D1%81%D1%82%D0%B0%D1%81%D1%8C%D1%86%D1%8C" title="Частасьць – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Частасьць" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A7%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%B0" title="Честота – 保加利亞文" lang="bg" hreflang="bg" data-title="Честота" data-language-autonym="Български" data-language-local-name="保加利亞文" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%95%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A6%BE%E0%A6%99%E0%A7%8D%E0%A6%95" title="কম্পাঙ্ক – 孟加拉文" lang="bn" hreflang="bn" data-title="কম্পাঙ্ক" data-language-autonym="বাংলা" data-language-local-name="孟加拉文" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Frekvencija" title="Frekvencija – 波士尼亞文" lang="bs" hreflang="bs" data-title="Frekvencija" data-language-autonym="Bosanski" data-language-local-name="波士尼亞文" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Freq%C3%BC%C3%A8ncia" title="Freqüència – 加泰羅尼亞文" lang="ca" hreflang="ca" data-title="Freqüència" data-language-autonym="Català" data-language-local-name="加泰羅尼亞文" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ce mw-list-item"><a href="https://ce.wikipedia.org/wiki/%D0%9B%D0%B5%D1%81%D1%82%D0%B0%D0%BC" title="Лестам – 車臣文" lang="ce" hreflang="ce" data-title="Лестам" data-language-autonym="Нохчийн" data-language-local-name="車臣文" class="interlanguage-link-target"><span>Нохчийн</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Kapila" title="Kapila – 宿霧文" lang="ceb" hreflang="ceb" data-title="Kapila" data-language-autonym="Cebuano" data-language-local-name="宿霧文" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-chr mw-list-item"><a href="https://chr.wikipedia.org/wiki/%E1%8E%A0%E1%8F%8D%E1%8F%93%E1%8F%A9%E1%8F%9B%E1%8F%8D%E1%8F%99%E1%8F%97" title="ᎠᏍᏓᏩᏛᏍᏙᏗ – 柴羅基文" lang="chr" hreflang="chr" data-title="ᎠᏍᏓᏩᏛᏍᏙᏗ" data-language-autonym="ᏣᎳᎩ" data-language-local-name="柴羅基文" class="interlanguage-link-target"><span>ᏣᎳᎩ</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%84%DB%95%D8%B1%DB%95%D9%84%DB%95%D8%B1" title="لەرەلەر – 索拉尼庫爾德文" lang="ckb" hreflang="ckb" data-title="لەرەلەر" data-language-autonym="کوردی" data-language-local-name="索拉尼庫爾德文" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Frekvence" title="Frekvence – 捷克文" lang="cs" hreflang="cs" data-title="Frekvence" data-language-autonym="Čeština" data-language-local-name="捷克文" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A2%C4%83%D1%82%C4%83%D1%88%D0%BB%C4%83%D1%85" title="Тăтăшлăх – 楚瓦什文" lang="cv" hreflang="cv" data-title="Тăтăшлăх" data-language-autonym="Чӑвашла" data-language-local-name="楚瓦什文" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Amledd" title="Amledd – 威爾斯文" lang="cy" hreflang="cy" data-title="Amledd" data-language-autonym="Cymraeg" data-language-local-name="威爾斯文" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Frekvens" title="Frekvens – 丹麥文" lang="da" hreflang="da" data-title="Frekvens" data-language-autonym="Dansk" data-language-local-name="丹麥文" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Frequenz" title="Frequenz – 德文" lang="de" hreflang="de" data-title="Frequenz" data-language-autonym="Deutsch" data-language-local-name="德文" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A3%CF%85%CF%87%CE%BD%CF%8C%CF%84%CE%B7%CF%84%CE%B1" title="Συχνότητα – 希臘文" lang="el" hreflang="el" data-title="Συχνότητα" data-language-autonym="Ελληνικά" data-language-local-name="希臘文" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Frequency" title="Frequency – 英文" lang="en" hreflang="en" data-title="Frequency" data-language-autonym="English" data-language-local-name="英文" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Frekvenco" title="Frekvenco – 世界文" lang="eo" hreflang="eo" data-title="Frekvenco" data-language-autonym="Esperanto" data-language-local-name="世界文" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Frecuencia" title="Frecuencia – 西班牙文" lang="es" hreflang="es" data-title="Frecuencia" data-language-autonym="Español" data-language-local-name="西班牙文" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Sagedus" title="Sagedus – 愛沙尼亞文" lang="et" hreflang="et" data-title="Sagedus" data-language-autonym="Eesti" data-language-local-name="愛沙尼亞文" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Maiztasun" title="Maiztasun – 巴斯克文" lang="eu" hreflang="eu" data-title="Maiztasun" data-language-autonym="Euskara" data-language-local-name="巴斯克文" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A8%D8%B3%D8%A7%D9%85%D8%AF" title="بسامد – 波斯文" lang="fa" hreflang="fa" data-title="بسامد" data-language-autonym="فارسی" data-language-local-name="波斯文" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Taajuus" title="Taajuus – 芬蘭文" lang="fi" hreflang="fi" data-title="Taajuus" data-language-autonym="Suomi" data-language-local-name="芬蘭文" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Fr%C3%A9quence" title="Fréquence – 法文" lang="fr" hreflang="fr" data-title="Fréquence" data-language-autonym="Français" data-language-local-name="法文" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Frekwens" title="Frekwens – 北弗里西亞文" lang="frr" hreflang="frr" data-title="Frekwens" data-language-autonym="Nordfriisk" data-language-local-name="北弗里西亞文" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Frekwinsje" title="Frekwinsje – 西弗里西亞文" lang="fy" hreflang="fy" data-title="Frekwinsje" data-language-autonym="Frysk" data-language-local-name="西弗里西亞文" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Minic%C3%ADocht" title="Minicíocht – 愛爾蘭文" lang="ga" hreflang="ga" data-title="Minicíocht" data-language-autonym="Gaeilge" data-language-local-name="愛爾蘭文" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Frecuencia" title="Frecuencia – 加里西亞文" lang="gl" hreflang="gl" data-title="Frecuencia" data-language-autonym="Galego" data-language-local-name="加里西亞文" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%86%E0%AA%B5%E0%AB%83%E0%AA%A4%E0%AB%8D%E0%AA%A4%E0%AA%BF" title="આવૃત્તિ – 古吉拉特文" lang="gu" hreflang="gu" data-title="આવૃત્તિ" data-language-autonym="ગુજરાતી" data-language-local-name="古吉拉特文" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%AA%D7%93%D7%99%D7%A8%D7%95%D7%AA" title="תדירות – 希伯來文" lang="he" hreflang="he" data-title="תדירות" data-language-autonym="עברית" data-language-local-name="希伯來文" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%86%E0%A4%B5%E0%A5%83%E0%A4%A4%E0%A5%8D%E0%A4%A4%E0%A4%BF" title="आवृत्ति – 北印度文" lang="hi" hreflang="hi" data-title="आवृत्ति" data-language-autonym="हिन्दी" data-language-local-name="北印度文" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Frequency" title="Frequency – 斐濟印地文" lang="hif" hreflang="hif" data-title="Frequency" data-language-autonym="Fiji Hindi" data-language-local-name="斐濟印地文" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Frekvencija" title="Frekvencija – 克羅埃西亞文" lang="hr" hreflang="hr" data-title="Frekvencija" data-language-autonym="Hrvatski" data-language-local-name="克羅埃西亞文" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Frekans" title="Frekans – 海地文" lang="ht" hreflang="ht" data-title="Frekans" data-language-autonym="Kreyòl ayisyen" data-language-local-name="海地文" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Frekvencia" title="Frekvencia – 匈牙利文" lang="hu" hreflang="hu" data-title="Frekvencia" data-language-autonym="Magyar" data-language-local-name="匈牙利文" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%80%D5%A1%D5%B3%D5%A1%D5%AD%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6" title="Հաճախություն – 亞美尼亞文" lang="hy" hreflang="hy" data-title="Հաճախություն" data-language-autonym="Հայերեն" data-language-local-name="亞美尼亞文" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Frequentia" title="Frequentia – 國際文" lang="ia" hreflang="ia" data-title="Frequentia" data-language-autonym="Interlingua" data-language-local-name="國際文" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Frekuensi" title="Frekuensi – 印尼文" lang="id" hreflang="id" data-title="Frekuensi" data-language-autonym="Bahasa Indonesia" data-language-local-name="印尼文" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Frequenco" title="Frequenco – 伊多文" lang="io" hreflang="io" data-title="Frequenco" data-language-autonym="Ido" data-language-local-name="伊多文" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/T%C3%AD%C3%B0ni" title="Tíðni – 冰島文" lang="is" hreflang="is" data-title="Tíðni" data-language-autonym="Íslenska" data-language-local-name="冰島文" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Frequenza" title="Frequenza – 義大利文" lang="it" hreflang="it" data-title="Frequenza" data-language-autonym="Italiano" data-language-local-name="義大利文" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%91%A8%E6%B3%A2%E6%95%B0" title="周波数 – 日文" lang="ja" hreflang="ja" data-title="周波数" data-language-autonym="日本語" data-language-local-name="日文" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A1%E1%83%98%E1%83%AE%E1%83%A8%E1%83%98%E1%83%A0%E1%83%94" title="სიხშირე – 喬治亞文" lang="ka" hreflang="ka" data-title="სიხშირე" data-language-autonym="ქართული" data-language-local-name="喬治亞文" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ki mw-list-item"><a href="https://ki.wikipedia.org/wiki/G%C4%A9thumba" title="Gĩthumba – 吉庫尤文" lang="ki" hreflang="ki" data-title="Gĩthumba" data-language-autonym="Gĩkũyũ" data-language-local-name="吉庫尤文" class="interlanguage-link-target"><span>Gĩkũyũ</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%96%D0%B8%D1%96%D0%BB%D1%96%D0%BA" title="Жиілік – 哈薩克文" lang="kk" hreflang="kk" data-title="Жиілік" data-language-autonym="Қазақша" data-language-local-name="哈薩克文" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A7%84%EB%8F%99%EC%88%98" title="진동수 – 韓文" lang="ko" hreflang="ko" data-title="진동수" data-language-autonym="한국어" data-language-local-name="韓文" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Frekans" title="Frekans – 庫爾德文" lang="ku" hreflang="ku" data-title="Frekans" data-language-autonym="Kurdî" data-language-local-name="庫爾德文" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/Menowghedh" title="Menowghedh – 康瓦耳文" lang="kw" hreflang="kw" data-title="Menowghedh" data-language-autonym="Kernowek" data-language-local-name="康瓦耳文" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%96%D1%8B%D1%88%D1%82%D1%8B%D0%BA" title="Жыштык – 吉爾吉斯文" lang="ky" hreflang="ky" data-title="Жыштык" data-language-autonym="Кыргызча" data-language-local-name="吉爾吉斯文" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Frequentia" title="Frequentia – 拉丁文" lang="la" hreflang="la" data-title="Frequentia" data-language-autonym="Latina" data-language-local-name="拉丁文" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Frequenza" title="Frequenza – 倫巴底文" lang="lmo" hreflang="lmo" data-title="Frequenza" data-language-autonym="Lombard" data-language-local-name="倫巴底文" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Da%C5%BEnis" title="Dažnis – 立陶宛文" lang="lt" hreflang="lt" data-title="Dažnis" data-language-autonym="Lietuvių" data-language-local-name="立陶宛文" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Frekvence" title="Frekvence – 拉脫維亞文" lang="lv" hreflang="lv" data-title="Frekvence" data-language-autonym="Latviešu" data-language-local-name="拉脫維亞文" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Hatetika" title="Hatetika – 馬拉加什文" lang="mg" hreflang="mg" data-title="Hatetika" data-language-autonym="Malagasy" data-language-local-name="馬拉加什文" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A7%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%B0" title="Честота – 馬其頓文" lang="mk" hreflang="mk" data-title="Честота" data-language-autonym="Македонски" data-language-local-name="馬其頓文" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%86%E0%B4%B5%E0%B5%83%E0%B4%A4%E0%B5%8D%E0%B4%A4%E0%B4%BF" title="ആവൃത്തി – 馬來亞拉姆文" lang="ml" hreflang="ml" data-title="ആവൃത്തി" data-language-autonym="മലയാളം" data-language-local-name="馬來亞拉姆文" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%94%D0%B0%D0%B2%D1%82%D0%B0%D0%BC%D0%B6" title="Давтамж – 蒙古文" lang="mn" hreflang="mn" data-title="Давтамж" data-language-autonym="Монгол" data-language-local-name="蒙古文" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B5%E0%A4%BE%E0%A4%B0%E0%A4%82%E0%A4%B5%E0%A4%BE%E0%A4%B0%E0%A4%A4%E0%A4%BE" title="वारंवारता – 馬拉地文" lang="mr" hreflang="mr" data-title="वारंवारता" data-language-autonym="मराठी" data-language-local-name="馬拉地文" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Frekuensi" title="Frekuensi – 馬來文" lang="ms" hreflang="ms" data-title="Frekuensi" data-language-autonym="Bahasa Melayu" data-language-local-name="馬來文" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%80%E1%80%BC%E1%80%AD%E1%80%99%E1%80%BA%E1%80%94%E1%80%BE%E1%80%AF%E1%80%94%E1%80%BA%E1%80%B8" title="ကြိမ်နှုန်း – 緬甸文" lang="my" hreflang="my" data-title="ကြိမ်နှုန်း" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="緬甸文" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Frequenz" title="Frequenz – 低地德文" lang="nds" hreflang="nds" data-title="Frequenz" data-language-autonym="Plattdüütsch" data-language-local-name="低地德文" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%AB%E0%A5%8D%E0%A4%B0%E0%A4%BF%E0%A4%95%E0%A5%8D%E0%A4%B5%E0%A5%87%E0%A4%A8%E0%A5%8D%E0%A4%B8%E0%A5%80" title="फ्रिक्वेन्सी – 尼瓦爾文" lang="new" hreflang="new" data-title="फ्रिक्वेन्सी" data-language-autonym="नेपाल भाषा" data-language-local-name="尼瓦爾文" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Frequentie" title="Frequentie – 荷蘭文" lang="nl" hreflang="nl" data-title="Frequentie" data-language-autonym="Nederlands" data-language-local-name="荷蘭文" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Frekvens" title="Frekvens – 耐諾斯克挪威文" lang="nn" hreflang="nn" data-title="Frekvens" data-language-autonym="Norsk nynorsk" data-language-local-name="耐諾斯克挪威文" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Frekvens" title="Frekvens – 巴克摩挪威文" lang="nb" hreflang="nb" data-title="Frekvens" data-language-autonym="Norsk bokmål" data-language-local-name="巴克摩挪威文" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Frequ%C3%A9ncia" title="Frequéncia – 奧克西坦文" lang="oc" hreflang="oc" data-title="Frequéncia" data-language-autonym="Occitan" data-language-local-name="奧克西坦文" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-om mw-list-item"><a href="https://om.wikipedia.org/wiki/Frequency" title="Frequency – 奧羅莫文" lang="om" hreflang="om" data-title="Frequency" data-language-autonym="Oromoo" data-language-local-name="奧羅莫文" class="interlanguage-link-target"><span>Oromoo</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%AB%E0%A9%8D%E0%A8%B0%E0%A9%80%E0%A8%95%E0%A9%81%E0%A8%90%E0%A8%82%E0%A8%B8%E0%A9%80" title="ਫ੍ਰੀਕੁਐਂਸੀ – 旁遮普文" lang="pa" hreflang="pa" data-title="ਫ੍ਰੀਕੁਐਂਸੀ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="旁遮普文" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Cz%C4%99stotliwo%C5%9B%C4%87" title="Częstotliwość – 波蘭文" lang="pl" hreflang="pl" data-title="Częstotliwość" data-language-autonym="Polski" data-language-local-name="波蘭文" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%81%D8%B1%DB%8C%DA%A9%D9%88%D8%A6%DB%8C%D9%86%D8%B3%DB%8C" title="فریکوئینسی – Western Punjabi" lang="pnb" hreflang="pnb" data-title="فریکوئینسی" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%81%D8%B1%D9%8A%DA%A9%D9%88%D9%86%D8%B3%D9%8A" title="فريکونسي – 普什圖文" lang="ps" hreflang="ps" data-title="فريکونسي" data-language-autonym="پښتو" data-language-local-name="普什圖文" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Frequ%C3%AAncia" title="Frequência – 葡萄牙文" lang="pt" hreflang="pt" data-title="Frequência" data-language-autonym="Português" data-language-local-name="葡萄牙文" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Maywiy_kutinchiq" title="Maywiy kutinchiq – 蓋楚瓦文" lang="qu" hreflang="qu" data-title="Maywiy kutinchiq" data-language-autonym="Runa Simi" data-language-local-name="蓋楚瓦文" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Frecven%C8%9B%C4%83" title="Frecvență – 羅馬尼亞文" lang="ro" hreflang="ro" data-title="Frecvență" data-language-autonym="Română" data-language-local-name="羅馬尼亞文" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A7%D0%B0%D1%81%D1%82%D0%BE%D1%82%D0%B0" title="Частота – 俄文" lang="ru" hreflang="ru" data-title="Частота" data-language-autonym="Русский" data-language-local-name="俄文" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%A4%D1%80%D0%B5%D0%BA%D0%B2%D0%B5%D0%BD%D1%86%D1%96%D1%8F" title="Фреквенція – 盧森尼亞文" lang="rue" hreflang="rue" data-title="Фреквенція" data-language-autonym="Русиньскый" data-language-local-name="盧森尼亞文" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-sa mw-list-item"><a href="https://sa.wikipedia.org/wiki/%E0%A4%86%E0%A4%B5%E0%A4%B0%E0%A5%8D%E0%A4%A4%E0%A4%A8%E0%A4%AE%E0%A5%8D_(Frequency)" title="आवर्तनम् (Frequency) – 梵文" lang="sa" hreflang="sa" data-title="आवर्तनम् (Frequency)" data-language-autonym="संस्कृतम्" data-language-local-name="梵文" class="interlanguage-link-target"><span>संस्कृतम्</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Pir%C3%ACudu" title="Pirìudu – 西西里文" lang="scn" hreflang="scn" data-title="Pirìudu" data-language-autonym="Sicilianu" data-language-local-name="西西里文" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D9%81%D8%B1%D9%8A%DA%AA%D9%88%D8%A6%D9%86%D8%B3%D9%8A" title="فريڪوئنسي – 信德文" lang="sd" hreflang="sd" data-title="فريڪوئنسي" data-language-autonym="سنڌي" data-language-local-name="信德文" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Frekvencija" title="Frekvencija – 塞爾維亞克羅埃西亞文" lang="sh" hreflang="sh" data-title="Frekvencija" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="塞爾維亞克羅埃西亞文" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%83%E0%B6%82%E0%B6%9B%E0%B7%8A%E2%80%8D%E0%B6%BA%E0%B7%8F%E0%B6%AD%E0%B6%BA" title="සංඛ්‍යාතය – 僧伽羅文" lang="si" hreflang="si" data-title="සංඛ්‍යාතය" data-language-autonym="සිංහල" data-language-local-name="僧伽羅文" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Frequency" title="Frequency – Simple English" lang="en-simple" hreflang="en-simple" data-title="Frequency" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Frekvencia_(fyzika)" title="Frekvencia (fyzika) – 斯洛伐克文" lang="sk" hreflang="sk" data-title="Frekvencia (fyzika)" data-language-autonym="Slovenčina" data-language-local-name="斯洛伐克文" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Frekvenca" title="Frekvenca – 斯洛維尼亞文" lang="sl" hreflang="sl" data-title="Frekvenca" data-language-autonym="Slovenščina" data-language-local-name="斯洛維尼亞文" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Rudido" title="Rudido – 塞內加爾文" lang="sn" hreflang="sn" data-title="Rudido" data-language-autonym="ChiShona" data-language-local-name="塞內加爾文" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Frekuenca" title="Frekuenca – 阿爾巴尼亞文" lang="sq" hreflang="sq" data-title="Frekuenca" data-language-autonym="Shqip" data-language-local-name="阿爾巴尼亞文" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A3%D1%87%D0%B5%D1%81%D1%82%D0%B0%D0%BB%D0%BE%D1%81%D1%82" title="Учесталост – 塞爾維亞文" lang="sr" hreflang="sr" data-title="Учесталост" data-language-autonym="Српски / srpski" data-language-local-name="塞爾維亞文" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Fr%C3%A9ku%C3%A9nsi" title="Frékuénsi – 巽他文" lang="su" hreflang="su" data-title="Frékuénsi" data-language-autonym="Sunda" data-language-local-name="巽他文" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Frekvens" title="Frekvens – 瑞典文" lang="sv" hreflang="sv" data-title="Frekvens" data-language-autonym="Svenska" data-language-local-name="瑞典文" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Marudio_(fizikia)" title="Marudio (fizikia) – 史瓦希里文" lang="sw" hreflang="sw" data-title="Marudio (fizikia)" data-language-autonym="Kiswahili" data-language-local-name="史瓦希里文" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%85%E0%AE%A4%E0%AE%BF%E0%AE%B0%E0%AF%8D%E0%AE%B5%E0%AF%86%E0%AE%A3%E0%AF%8D" title="அதிர்வெண் – 坦米爾文" lang="ta" hreflang="ta" data-title="அதிர்வெண்" data-language-autonym="தமிழ்" data-language-local-name="坦米爾文" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AA%E0%B1%8C%E0%B0%A8%E0%B0%83_%E0%B0%AA%E0%B1%81%E0%B0%A8%E0%B1%8D%E0%B0%AF%E0%B0%AE%E0%B1%81" title="పౌనః పున్యము – 泰盧固文" lang="te" hreflang="te" data-title="పౌనః పున్యము" data-language-autonym="తెలుగు" data-language-local-name="泰盧固文" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%91%D0%B0%D1%81%D0%BE%D0%BC%D0%B0%D0%B4" title="Басомад – 塔吉克文" lang="tg" hreflang="tg" data-title="Басомад" data-language-autonym="Тоҷикӣ" data-language-local-name="塔吉克文" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B8%96%E0%B8%B5%E0%B9%88" title="ความถี่ – 泰文" lang="th" hreflang="th" data-title="ความถี่" data-language-autonym="ไทย" data-language-local-name="泰文" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tk mw-list-item"><a href="https://tk.wikipedia.org/wiki/Tizlik" title="Tizlik – 土庫曼文" lang="tk" hreflang="tk" data-title="Tizlik" data-language-autonym="Türkmençe" data-language-local-name="土庫曼文" class="interlanguage-link-target"><span>Türkmençe</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Dalasan" title="Dalasan – 塔加路族文" lang="tl" hreflang="tl" data-title="Dalasan" data-language-autonym="Tagalog" data-language-local-name="塔加路族文" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Frekans" title="Frekans – 土耳其文" lang="tr" hreflang="tr" data-title="Frekans" data-language-autonym="Türkçe" data-language-local-name="土耳其文" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%95%D1%88%D0%BB%D1%8B%D0%BA" title="Ешлык – 韃靼文" lang="tt" hreflang="tt" data-title="Ешлык" data-language-autonym="Татарча / tatarça" data-language-local-name="韃靼文" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%DA%86%D8%A7%D8%B3%D8%AA%D9%88%D8%AA%D8%A7" title="چاستوتا – 維吾爾文" lang="ug" hreflang="ug" data-title="چاستوتا" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="維吾爾文" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A7%D0%B0%D1%81%D1%82%D0%BE%D1%82%D0%B0" title="Частота – 烏克蘭文" lang="uk" hreflang="uk" data-title="Частота" data-language-autonym="Українська" data-language-local-name="烏克蘭文" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%AA%D8%B9%D8%AF%D8%AF" title="تعدد – 烏都文" lang="ur" hreflang="ur" data-title="تعدد" data-language-autonym="اردو" data-language-local-name="烏都文" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Chastota" title="Chastota – 烏茲別克文" lang="uz" hreflang="uz" data-title="Chastota" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="烏茲別克文" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Frecuensa" title="Frecuensa – 威尼斯文" lang="vec" hreflang="vec" data-title="Frecuensa" data-language-autonym="Vèneto" data-language-local-name="威尼斯文" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/T%E1%BA%A7n_s%E1%BB%91" title="Tần số – 越南文" lang="vi" hreflang="vi" data-title="Tần số" data-language-autonym="Tiếng Việt" data-language-local-name="越南文" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Frekwensiya" title="Frekwensiya – 瓦瑞文" lang="war" hreflang="war" data-title="Frekwensiya" data-language-autonym="Winaray" data-language-local-name="瓦瑞文" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wo mw-list-item"><a href="https://wo.wikipedia.org/wiki/Baraay" title="Baraay – 沃洛夫文" lang="wo" hreflang="wo" data-title="Baraay" data-language-autonym="Wolof" data-language-local-name="沃洛夫文" class="interlanguage-link-target"><span>Wolof</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E9%A2%91%E7%8E%87" title="频率 – 吳語" lang="wuu" hreflang="wuu" data-title="频率" data-language-autonym="吴语" data-language-local-name="吳語" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%A4%D7%A8%D7%A2%D7%A7%D7%95%D7%95%D7%A2%D7%A0%D7%A5" title="פרעקווענץ – 意第緒文" lang="yi" hreflang="yi" data-title="פרעקווענץ" data-language-autonym="ייִדיש" data-language-local-name="意第緒文" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E9%A0%BB%E7%8E%87_(%E7%89%A9%E7%90%86%E5%AD%B8)" title="頻率 (物理學) – 中文" lang="zh" hreflang="zh" data-title="頻率 (物理學)" data-language-autonym="中文" data-language-local-name="中文" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/P%C3%AEn-lu%CC%8Dt" title="Pîn-lu̍t – 閩南語" lang="nan" hreflang="nan" data-title="Pîn-lu̍t" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="閩南語" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/Umjinge" title="Umjinge – 祖魯文" lang="zu" hreflang="zu" data-title="Umjinge" data-language-autonym="IsiZulu" data-language-local-name="祖魯文" class="interlanguage-link-target"><span>IsiZulu</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q11652#sitelinks-wikipedia" title="改跨語言拎" class="wbc-editpage">改拎</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="空間名"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/%E9%A0%BB%E7%8E%87" title="睇吓內容頁[c]" accesskey="c"><span>文章</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:%E9%A0%BB%E7%8E%87" rel="discussion" title="關於內容頁嘅討論[t]" accesskey="t"><span>討論</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="改語言變體" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">粵語</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="外觀"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/%E9%A0%BB%E7%8E%87"><span>閱</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=edit" title="改呢版嘅代碼[e]" accesskey="e"><span>改</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=history" title="呢一頁之前嘅修訂[h]" accesskey="h"><span>睇返紀錄</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="頁面工具"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="架撐" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">架撐</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">架撐</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">移去側欄</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">收埋</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="多啲選項" > <div class="vector-menu-heading"> 動作 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/%E9%A0%BB%E7%8E%87"><span>閱</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=edit" title="改呢版嘅代碼[e]" accesskey="e"><span>改</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=history"><span>睇返紀錄</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> 基本 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:%E9%82%8A%E5%BA%A6%E9%8F%88%E5%8E%BB%E5%91%A2%E7%89%88/%E9%A0%BB%E7%8E%87" title="列出所有連接過嚟呢度嘅頁面[j]" accesskey="j"><span>有乜連過嚟</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:%E5%A4%96%E9%8F%88%E4%BF%AE%E6%94%B9/%E9%A0%BB%E7%8E%87" rel="nofollow" title="由呢版連出去嘅版嘅最近修改[k]" accesskey="k"><span>連結頁嘅更改</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Project:%E4%B8%8A%E8%BC%89" title="上載檔案[u]" accesskey="u"><span>上載檔案</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:%E5%B0%88%E9%96%80%E7%89%88" title="所有專門版一覽[q]" accesskey="q"><span>專門版</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&oldid=2171211" title="呢版呢個修訂嘅永久網址"><span>固定連結</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=info" title="多啲同呢版有拏褦嘅資料"><span>此版明細</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:%E5%BC%95%E7%94%A8&page=%E9%A0%BB%E7%8E%87&id=2171211&wpFormIdentifier=titleform" title="點樣引用呢頁嘅資訊"><span>引用呢篇文</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fzh-yue.wikipedia.org%2Fwiki%2F%25E9%25A0%25BB%25E7%258E%2587"><span>攞短網址</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fzh-yue.wikipedia.org%2Fwiki%2F%25E9%25A0%25BB%25E7%258E%2587"><span>下載QR code</span></a></li> </ul> </div> </div> <div id="p-electronpdfservice-sidebar-portlet-heading" class="vector-menu mw-portlet mw-portlet-electronpdfservice-sidebar-portlet-heading" > <div class="vector-menu-heading"> 打印/匯出 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="electron-print_pdf" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=%E9%A0%BB%E7%8E%87&action=show-download-screen"><span>下載PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="javascript:print();" rel="alternate" title="呢一版印得嘅版本[p]" accesskey="p"><span>印得嘅版本</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> 第啲維基項目 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Frequency" hreflang="en"><span>維基同享</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q11652" title="連到接住資料儲存庫嘅項目[g]" accesskey="g"><span>維基數據項</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="頁面工具"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="閱讀設定"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">閱讀設定</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">移去側欄</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">收埋</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">出自維基百科，自由嘅百科全書</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="yue" dir="ltr"><div role="note" class="hatnote"><span typeof="mw:File"><a href="/wiki/Wikipedia:%E6%90%9E%E6%B8%85%E6%A5%9A" title="Wikipedia:搞清楚"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Disambig_gray.svg/25px-Disambig_gray.svg.png" decoding="async" width="25" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Disambig_gray.svg/38px-Disambig_gray.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Disambig_gray.svg/50px-Disambig_gray.svg.png 2x" data-file-width="220" data-file-height="168" /></a></span>  <small>想搵統計學上嘅頻率嘅話，請睇<b><a href="/wiki/%E9%A0%BB%E7%8E%87_(%E7%B5%B1%E8%A8%88%E5%AD%B8)" title="頻率 (統計學)">頻率 (統計學)</a></b></small><small>。</small></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:%E0%B8%A5%E0%B8%B9%E0%B8%81%E0%B8%95%E0%B8%B8%E0%B9%89%E0%B8%A1%E0%B8%98%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%8A%E0%B8%B2%E0%B8%95%E0%B8%B4.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1b/%E0%B8%A5%E0%B8%B9%E0%B8%81%E0%B8%95%E0%B8%B8%E0%B9%89%E0%B8%A1%E0%B8%98%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%8A%E0%B8%B2%E0%B8%95%E0%B8%B4.gif/270px-%E0%B8%A5%E0%B8%B9%E0%B8%81%E0%B8%95%E0%B8%B8%E0%B9%89%E0%B8%A1%E0%B8%98%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%8A%E0%B8%B2%E0%B8%95%E0%B8%B4.gif" decoding="async" width="270" height="203" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/1/1b/%E0%B8%A5%E0%B8%B9%E0%B8%81%E0%B8%95%E0%B8%B8%E0%B9%89%E0%B8%A1%E0%B8%98%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%8A%E0%B8%B2%E0%B8%95%E0%B8%B4.gif 1.5x" data-file-width="300" data-file-height="225" /></a><figcaption>每分鐘擺動25次，頻率就係0.416 Hz</figcaption></figure> <p><b>頻率</b>（<a href="/wiki/Wikipedia:%E7%B2%B5%E6%96%87%E6%8B%BC%E9%9F%B3" title="Wikipedia:粵文拼音">粵拼</a>：<span class="plainlinks" style="display:inline-block"><a rel="nofollow" class="external text" href="http://yue.forvo.com/word/yue/頻率/#yue"><span><b>pan<span class="Jpingtone">4</span> leot<span class="Jpingtone">2*6</span></b></span></a></span>）係度一段<a href="/wiki/%E5%96%AE%E4%BD%8D%E6%99%82%E9%96%93" class="mw-redirect" title="單位時間">單位時間</a>裏便，重覆<a href="/w/index.php?title=%E6%AC%A1%E6%95%B8&action=edit&redlink=1" class="new" title="次數 (無呢版)">次數</a>。佢嘅<a href="/wiki/%E5%80%92%E6%95%B8_(%E6%95%B8)" title="倒數 (數)">倒數</a>就係<b>週期</b>。任何周而復始嘅過程，都有頻率。例如，打圈、震動、波浪，都有頻率。頻率單位係每秒幾多次，國際單位叫<a href="/wiki/%E8%B5%AB" class="mw-redirect" title="赫">赫</a>，符號 <b>Hz</b>。 </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="公式"><span id=".E5.85.AC.E5.BC.8F"></span>公式</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=edit&section=1" title="編輯小節: 公式"><span>編輯</span></a><span class="mw-editsection-bracket">]</span></span></div> <div role="note" class="hatnote">睇埋：<a href="/wiki/%E6%99%82%E9%96%93" title="時間">時間</a></div> <p>想像有一件物體（波源），佢响度發出一段段持續嘅<a href="/wiki/%E8%81%B2%E6%B3%A2" class="mw-redirect" title="聲波">聲波</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>註 1<span class="cite-bracket">]</span></a></sup>。設 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle f}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>f</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle f}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/132e57acb643253e7810ee9702d9581f159a1c61" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.279ex; height:2.509ex;" alt="{\displaystyle f}"></span> 做波源發出嘅呢段聲波嘅<a class="mw-selflink selflink">頻率</a>，呢股波嘅<a class="mw-selflink selflink">週期</a> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ec7200acd984a1d3a3d7dc455e262fbe54f7f6e0" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.636ex; height:2.176ex;" alt="{\displaystyle T}"></span> 就等如<sup id="cite_ref-lecture21_2-0" class="reference"><a href="#cite_note-lecture21-2"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T={\frac {1}{f}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mi>f</mi> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T={\frac {1}{f}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/9738d100b1fb3fefa126479be1ba1f9bbe9d5e9e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:6.849ex; height:5.676ex;" alt="{\displaystyle T={\frac {1}{f}}}"></span></dd></dl> <ul><li><b>頻率</b>（<a href="/wiki/%E8%8B%B1%E6%96%87" title="英文">英文</a>：<span lang="en"><b>frequency</b></span>）：指一秒重複幾多次－1 <a href="/wiki/Hz" class="mw-redirect" title="Hz">Hz</a> 表示每秒重複 1 次、2 Hz 表示每秒重複 2 次... 如此類推<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>。</li> <li><b>週期</b>（<a href="/wiki/%E8%8B%B1%E6%96%87" title="英文">英文</a>：<span lang="en"><b>period</b></span>）：指重複一次要幾耐（以秒計）。</li></ul> <p>假想依家有一位<a href="/wiki/%E4%BA%BA%E9%A1%9E" class="mw-redirect" title="人類">人類</a>觀察者喺度聽嗰股聲波，同時假設由始至終，聲波嘅頻率無論點變都冇離開人類嘅<a href="/wiki/%E8%81%BD%E5%8A%9B%E7%AF%84%E5%9C%8D" title="聽力範圍">聽力範圍</a>。設波源同觀察者都係靜止唔郁（<a href="/wiki/%E9%80%9F%E5%BA%A6" title="速度">速度</a>同<a href="/wiki/%E5%8A%A0%E9%80%9F%E5%BA%A6" title="加速度">加速度</a>都係 0）嘅，觀察者接收到嗰一股波動，每兩個相鄰嘅<a href="/wiki/%E6%B3%A2%E5%8B%95" title="波動">高峰</a>（maxima <sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>註 2<span class="cite-bracket">]</span></a></sup>；近似<a href="/wiki/%E7%B2%B5%E6%8B%BC" class="mw-redirect" title="粵拼">粵拼</a>：<span>mek<span class="Jpingtone">1</span> sim<span class="Jpingtone">4</span> maa<span class="Jpingtone">4</span></span>）之間喺時間上都相差咗 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ec7200acd984a1d3a3d7dc455e262fbe54f7f6e0" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.636ex; height:2.176ex;" alt="{\displaystyle T}"></span> 咁多，而股波動嘅<a href="/wiki/%E6%B3%A2%E9%95%B7" title="波長">波長</a> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \lambda }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>λ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \lambda }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b43d0ea3c9c025af1be9128e62a18fa74bedda2a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.355ex; height:2.176ex;" alt="{\displaystyle \lambda }"></span>（簡化講可以當做兩個相鄰高峰之間嘅<a href="/wiki/%E8%B7%9D%E9%9B%A2" title="距離">距離</a>）就會係 </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \lambda =Tc_{s}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>λ</mi> <mo>=</mo> <mi>T</mi> <msub> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>s</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \lambda =Tc_{s}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d620dd59e8afcfb6db655046ffef589410d775b8" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:8.1ex; height:2.509ex;" alt="{\displaystyle \lambda =Tc_{s}}"></span>，掉一掉就變</dd> <dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T={\frac {\lambda }{c_{s}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>λ</mi> <msub> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>s</mi> </mrow> </msub> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T={\frac {\lambda }{c_{s}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f4b037ceb63810d2b715982e71b9ab4f4a9ba95b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.171ex; width:7.581ex; height:5.676ex;" alt="{\displaystyle T={\frac {\lambda }{c_{s}}}}"></span></dd></dl> <p>當中 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle c}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>c</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle c}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/86a67b81c2de995bd608d5b2df50cd8cd7d92455" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.007ex; height:1.676ex;" alt="{\displaystyle c}"></span> 喺呢個情況下係<a href="/wiki/%E9%9F%B3%E9%80%9F" title="音速">音速</a>。 </p><p>要<a href="/wiki/%E5%BB%A3%E7%BE%A9%E5%8C%96" title="廣義化">廣義化</a>（適用於其他波動同<a href="/wiki/%E4%BB%8B%E8%B3%AA" title="介質">介質</a>）嘅話，<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle c}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>c</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle c}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/86a67b81c2de995bd608d5b2df50cd8cd7d92455" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.007ex; height:1.676ex;" alt="{\displaystyle c}"></span> 就係「呢種波動喺呢種介質入便嘅行進速度」。 </p><p><a href="/wiki/%E6%8C%AF%E5%8B%95" title="振動">振動</a>指嚿物體相對於<a href="/wiki/%E7%A9%BA%E9%96%93" title="空間">空間</a>入面嘅某一點來回噉郁（例如郁去左邊，去到最左嗰點就向右郁，去到最右嗰點之後向左郁... 如此類推），即係話振動呢種郁動實係會<a href="/wiki/%E9%80%B1%E6%9C%9F%E6%80%A7" class="mw-redirect" title="週期性">每隔一段短嘅時間就會重複</a>嘅。 </p> <div class="mw-heading mw-heading2"><h2 id="聲學"><span id=".E8.81.B2.E5.AD.B8"></span>聲學</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=edit&section=2" title="編輯小節: 聲學"><span>編輯</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1488945/mw-parser-output/.tmulti">.mw-parser-output .tmulti .thumbinner{display:flex;flex-direction:column}.mw-parser-output .tmulti .trow{display:flex;flex-direction:row;clear:left;flex-wrap:wrap;width:100%;box-sizing:border-box}.mw-parser-output .tmulti .tsingle{margin:1px;float:left}.mw-parser-output .tmulti .theader{clear:both;font-weight:bold;text-align:center;align-self:center;background-color:transparent;width:100%}.mw-parser-output .tmulti .thumbcaption{background-color:transparent}.mw-parser-output .tmulti .text-align-left{text-align:left}.mw-parser-output .tmulti .text-align-right{text-align:right}.mw-parser-output .tmulti .text-align-center{text-align:center}@media all and (max-width:720px){.mw-parser-output .tmulti .thumbinner{width:100%!important;box-sizing:border-box;max-width:none!important;align-items:center}.mw-parser-output .tmulti .trow{justify-content:center}.mw-parser-output .tmulti .tsingle{float:none!important;max-width:100%!important;box-sizing:border-box}.mw-parser-output .tmulti .trow>.thumbcaption{text-align:center}}</style><div class="thumb tmulti tright"><div class="thumbinner" style="width:274px;max-width:274px"><div class="trow"><div class="tsingle" style="width:272px;max-width:272px"><div class="thumbimage"><span typeof="mw:File"><span><audio id="mwe_player_0" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="270" style="width:270px;" data-durationhint="18" data-mwtitle="G,_D,_A_and_E_on_violin.ogg" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/c/c4/G%2C_D%2C_A_and_E_on_violin.ogg" type="audio/ogg; codecs="vorbis"" data-width="0" data-height="0" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c4/G%2C_D%2C_A_and_E_on_violin.ogg/G%2C_D%2C_A_and_E_on_violin.ogg.mp3" type="audio/mpeg" data-transcodekey="mp3" data-width="0" data-height="0" /></audio></span></span></div><div class="thumbcaption">用<a href="/wiki/%E5%B0%8F%E6%8F%90%E7%90%B4" title="小提琴">小提琴</a>拉四吓唔同音高嘅<a href="/wiki/%E9%9F%B3%E7%AC%A6" title="音符">音符</a></div></div></div><div class="trow"><div class="tsingle" style="width:272px;max-width:272px"><div class="thumbimage"><span typeof="mw:File"><span><audio id="mwe_player_1" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="270" style="width:270px;" data-durationhint="8" data-mwtitle="Gamme_majeure_LA.ogg" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/8/83/Gamme_majeure_LA.ogg" type="audio/ogg; codecs="vorbis"" data-width="0" data-height="0" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/8/83/Gamme_majeure_LA.ogg/Gamme_majeure_LA.ogg.mp3" type="audio/mpeg" data-transcodekey="mp3" data-width="0" data-height="0" /></audio></span></span></div><div class="thumbcaption">用<a href="/wiki/%E9%9B%BB%E7%B5%90%E4%BB%96" title="電結他">電結他</a>彈好多吓唔同音高嘅音符</div></div></div><div class="trow"><div class="tsingle" style="width:272px;max-width:272px"><div class="thumbimage"><span typeof="mw:File"><span><video id="mwe_player_2" poster="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/270px--23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="270" height="152" data-durationhint="118" data-mwtitle="23._Звучни_виљушки.ogv" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.480p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.720p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.1080p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="1080p.vp9.webm" data-width="1920" data-height="1080" /><source src="//upload.wikimedia.org/wikipedia/commons/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv" type="video/ogg; codecs="theora, vorbis"" data-width="1920" data-height="1080" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.360p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/3/34/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv/23._%D0%97%D0%B2%D1%83%D1%87%D0%BD%D0%B8_%D0%B2%D0%B8%D1%99%D1%83%D1%88%D0%BA%D0%B8.ogv.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="640" data-height="360" /></video></span></span></div><div class="thumbcaption">一個人重複噉㩧兩碌<a href="/wiki/%E9%9F%B3%E5%8F%89" title="音叉">音叉</a>；呢場實驗展示音叉嘅<a href="/wiki/%E6%8C%AF%E5%8B%95" title="振動">振動</a>產生聲。</div></div></div></div></div> <div role="note" class="hatnote">睇埋：<a href="/wiki/%E9%9F%B3%E9%AB%98" title="音高">音高</a>同<a href="/wiki/%E6%8C%AF%E5%8B%95" title="振動">振動</a></div> <p>喺現代<a href="/wiki/%E8%81%B2%E5%AD%B8" title="聲學">聲學</a>之前，玩<a href="/wiki/%E9%9F%B3%E6%A8%82" title="音樂">音樂</a>嘅人經已能夠齋靠<a href="/wiki/%E8%80%B3%E4%BB%94" class="mw-redirect" title="耳仔">耳仔</a><a href="/wiki/%E8%81%BD%E8%A6%BA" title="聽覺">聽</a>得出唔同嘅聲有「高低」之分。打後<a href="/wiki/%E7%89%A9%E7%90%86%E5%AD%B8" title="物理學">物理學</a>上<a href="/wiki/%E8%81%B2%E5%AD%B8" title="聲學">對聲嘅研究</a>仲有進一步噉分析<a href="/wiki/%E8%81%B2%E6%B3%A2" class="mw-redirect" title="聲波">聲波</a>嘅頻率。 </p><p>聲學上嘅研究已知，一段<a href="/wiki/%E8%81%B2%E6%B3%A2" class="mw-redirect" title="聲波">聲波</a>聽落「<a href="/wiki/%E9%9F%B3%E9%AB%98" title="音高">個音有幾高</a>」係取決於佢頻率嘅，而股聲波「有幾大聲」就取決於佢嘅<a href="/wiki/%E6%8C%AF%E5%B9%85" title="振幅">振幅</a>。<a href="/wiki/%E7%A7%91%E5%AD%B8%E5%AE%B6" title="科學家">科學家</a>可以用<a href="/wiki/%E7%A4%BA%E6%B3%A2%E5%99%A8" title="示波器">示波器</a>等嘅架生<a href="/wiki/%E9%87%8F%E5%BA%A6" title="量度">量度</a>語音嘅呢啲聲學特性。 </p> <div class="mw-heading mw-heading2"><h2 id="睇埋"><span id=".E7.9D.87.E5.9F.8B"></span>睇埋</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=edit&section=3" title="編輯小節: 睇埋"><span>編輯</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/%E9%9B%BB%E5%A3%93" title="電壓">電壓</a>（<a href="/wiki/%E4%BA%A4%E6%B5%81%E9%9B%BB" class="mw-redirect" title="交流電">交流電</a>）</li> <li><a href="/wiki/%E7%B0%A1%E8%AB%A7%E9%81%8B%E5%8B%95" title="簡諧運動">簡諧運動</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="註釋"><span id=".E8.A8.BB.E9.87.8B"></span>註釋</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=edit&section=4" title="編輯小節: 註釋"><span>編輯</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r2020813">.mw-parser-output .reflist{font-size:90%;margin-bottom:0.5em;list-style-type:decimal}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text">就算將「聲波」換做<a href="/wiki/%E5%85%89" title="光">光</a>、<a href="/wiki/%E8%A1%A8%E9%9D%A2%E6%B3%A2" title="表面波">表面波</a>或者其他<a href="/wiki/%E6%B3%A2%E5%8B%95" title="波動">波動</a>，下面講嘅原理都可以用同樣嘅方法嚟諗。</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">呢隻字詞喺英文入邊係<a href="/wiki/%E7%9C%BE%E6%95%B8_(%E6%96%87%E6%B3%95)" title="眾數 (文法)">眾數</a>。</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="引述"><span id=".E5.BC.95.E8.BF.B0"></span>引述</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E9%A0%BB%E7%8E%87&action=edit&section=5" title="編輯小節: 引述"><span>編輯</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r2020813"><div class="reflist reflist-columns references-column-width"> <ol class="references"> <li id="cite_note-lecture21-2"><span class="mw-cite-backlink"><a href="#cite_ref-lecture21_2-0">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://scholar.harvard.edu/files/schwartz/files/lecture21-doppler.pdf">Lecture 21: The Doppler effect</a> (PDF)</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text">Tongue, Benson (2001). <i>Principles of Vibration</i>, Oxford University Press.</span> </li> </ol></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">由「<a dir="ltr" href="https://zh-yue.wikipedia.org/w/index.php?title=頻率&oldid=2171211">https://zh-yue.wikipedia.org/w/index.php?title=頻率&oldid=2171211</a>」收</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Special:%E5%88%86%E9%A1%9E" title="Special:分類">屬於1類</a>：<ul><li><a href="/w/index.php?title=Category:%E9%A0%BB%E7%8E%87&action=edit&redlink=1" class="new" title="Category:頻率 (無呢版)">頻率</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks 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