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<a class="vector-toc-link" href="#Articles_connexes"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Articles connexes</span> </div> </a> <ul id="toc-Articles_connexes-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Sources" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Sources"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Sources</span> </div> </a> <ul id="toc-Sources-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes_et_références" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes_et_références"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Notes et références</span> </div> </a> <ul id="toc-Notes_et_références-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div 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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">Ultra basse fréquence</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="Aller à un article dans une autre langue. Disponible en 21 langues." > <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-21" 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">21 langues</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%86%E0%A6%B2%E0%A6%9F%E0%A7%8D%E0%A6%B0%E0%A6%BE_%E0%A6%B2%E0%A7%8B_%E0%A6%AB%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%95%E0%A7%81%E0%A6%AF%E0%A6%BC%E0%A7%87%E0%A6%A8%E0%A7%8D%E0%A6%B8%E0%A6%BF" title="আলট্রা লো ফ্রিকুয়েন্সি – bengali" lang="bn" hreflang="bn" data-title="আলট্রা লো ফ্রিকুয়েন্সি" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Freq%C3%BC%C3%A8ncia_ultrabaixa" title="Freqüència ultrabaixa – catalan" lang="ca" hreflang="ca" data-title="Freqüència ultrabaixa" data-language-autonym="Català" data-language-local-name="catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/ULF" title="ULF – danois" lang="da" hreflang="da" data-title="ULF" data-language-autonym="Dansk" data-language-local-name="danois" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Ultra_low_frequency" title="Ultra low frequency – anglais" lang="en" hreflang="en" data-title="Ultra low frequency" data-language-autonym="English" data-language-local-name="anglais" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Frecuencia_ultrabaja" title="Frecuencia ultrabaja – espagnol" lang="es" hreflang="es" data-title="Frecuencia ultrabaja" data-language-autonym="Español" data-language-local-name="espagnol" class="interlanguage-link-target"><span>Español</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_%D9%81%D8%B1%D8%A7%D9%BE%D8%A7%DB%8C%DB%8C%D9%86" title="بسامد فراپایین – persan" lang="fa" hreflang="fa" data-title="بسامد فراپایین" data-language-autonym="فارسی" data-language-local-name="persan" 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/ULF_(taajuusalue)" title="ULF (taajuusalue) – finnois" lang="fi" hreflang="fi" data-title="ULF (taajuusalue)" data-language-autonym="Suomi" data-language-local-name="finnois" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%85%E0%A4%A4%E0%A5%8D%E0%A4%AF%E0%A4%A8%E0%A5%8D%E0%A4%A4_%E0%A4%A8%E0%A4%BF%E0%A4%AE%E0%A5%8D%E0%A4%A8_%E0%A4%86%E0%A4%B5%E0%A5%83%E0%A4%A4%E0%A5%8D%E0%A4%A4%E0%A4%BF_(ULF)" title="अत्यन्त निम्न आवृत्ति (ULF) – hindi" lang="hi" hreflang="hi" data-title="अत्यन्त निम्न आवृत्ति (ULF)" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Frekuensi_ultra_rendah" title="Frekuensi ultra rendah – indonésien" lang="id" hreflang="id" data-title="Frekuensi ultra rendah" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonésien" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Ultra_low_frequency" title="Ultra low frequency – italien" lang="it" hreflang="it" data-title="Ultra low frequency" data-language-autonym="Italiano" data-language-local-name="italien" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Ultra-low_frequency" title="Ultra-low frequency – néerlandais" lang="nl" hreflang="nl" data-title="Ultra-low frequency" data-language-autonym="Nederlands" data-language-local-name="néerlandais" 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/Ultral%C3%A5g_frekvens" title="Ultralåg frekvens – norvégien nynorsk" lang="nn" hreflang="nn" data-title="Ultralåg frekvens" data-language-autonym="Norsk nynorsk" data-language-local-name="norvégien nynorsk" 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/Ultralav_frekvens" title="Ultralav frekvens – norvégien bokmål" lang="nb" hreflang="nb" data-title="Ultralav frekvens" data-language-autonym="Norsk bokmål" data-language-local-name="norvégien bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/ULF" title="ULF – polonais" lang="pl" hreflang="pl" data-title="ULF" data-language-autonym="Polski" data-language-local-name="polonais" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Frequ%C3%AAncia_ultrabaixa" title="Frequência ultrabaixa – portugais" lang="pt" hreflang="pt" data-title="Frequência ultrabaixa" data-language-autonym="Português" data-language-local-name="portugais" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Ultral%C3%A5g_frekvens" title="Ultralåg frekvens – suédois" lang="sv" hreflang="sv" data-title="Ultralåg frekvens" data-language-autonym="Svenska" data-language-local-name="suédois" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Ultra_d%C3%BC%C5%9F%C3%BCk_frekans" title="Ultra düşük frekans – turc" lang="tr" hreflang="tr" data-title="Ultra düşük frekans" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A3%D0%BB%D1%8C%D1%82%D1%80%D0%B0%D0%BD%D0%B8%D0%B7%D1%8C%D0%BA%D0%B0_%D1%87%D0%B0%D1%81%D1%82%D0%BE%D1%82%D0%B0" title="Ультранизька частота – ukrainien" lang="uk" hreflang="uk" data-title="Ультранизька частота" data-language-autonym="Українська" data-language-local-name="ukrainien" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Ultra_low_frequency" title="Ultra low frequency – vénitien" lang="vec" hreflang="vec" data-title="Ultra low frequency" data-language-autonym="Vèneto" data-language-local-name="vénitien" 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_c%E1%BB%B1c_th%E1%BA%A5p" title="Tần số cực thấp – vietnamien" lang="vi" hreflang="vi" data-title="Tần số cực thấp" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamien" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%89%B9%E4%BD%8E%E9%A0%BB" title="特低頻 – chinois" lang="zh" hreflang="zh" data-title="特低頻" data-language-autonym="中文" data-language-local-name="chinois" class="interlanguage-link-target"><span>中文</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/Q2488684#sitelinks-wikipedia" title="Modifier les liens interlangues" class="wbc-editpage">Modifier les liens</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="Espaces de noms"> <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/Ultra_basse_fr%C3%A9quence" title="Voir le contenu de la page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discussion:Ultra_basse_fr%C3%A9quence" rel="discussion" title="Discussion au sujet de cette page de contenu [t]" accesskey="t"><span>Discussion</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="Modifier la variante de langue" > <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">français</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="Affichages"> <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/Ultra_basse_fr%C3%A9quence"><span>Lire</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit" title="Modifier cette page [v]" accesskey="v"><span>Modifier</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit" title="Modifier le wikicode de cette page [e]" accesskey="e"><span>Modifier le code</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=history" title="Historique des versions de cette page [h]" accesskey="h"><span>Voir l’historique</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Outils de la page"> <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="Outils" > <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">Outils</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">Outils</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">déplacer vers la barre latérale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">masquer</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Plus d’options" > <div class="vector-menu-heading"> Actions </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/Ultra_basse_fr%C3%A9quence"><span>Lire</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit" title="Modifier cette page [v]" accesskey="v"><span>Modifier</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit" title="Modifier le wikicode de cette page [e]" accesskey="e"><span>Modifier le code</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=history"><span>Voir l’historique</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Général </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Sp%C3%A9cial:Pages_li%C3%A9es/Ultra_basse_fr%C3%A9quence" title="Liste des pages liées qui pointent sur celle-ci [j]" accesskey="j"><span>Pages liées</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Sp%C3%A9cial:Suivi_des_liens/Ultra_basse_fr%C3%A9quence" rel="nofollow" title="Liste des modifications récentes des pages appelées par celle-ci [k]" accesskey="k"><span>Suivi des pages liées</span></a></li><li id="t-upload" class="mw-list-item"><a href="//fr.wikipedia.org/wiki/Aide:Importer_un_fichier" title="Téléverser des fichiers [u]" accesskey="u"><span>Téléverser un fichier</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&oldid=208832261" title="Adresse permanente de cette version de cette page"><span>Lien permanent</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=info" title="Davantage d’informations sur cette page"><span>Informations sur la page</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Sp%C3%A9cial:Citer&page=Ultra_basse_fr%C3%A9quence&id=208832261&wpFormIdentifier=titleform" title="Informations sur la manière de citer cette page"><span>Citer cette page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Sp%C3%A9cial:UrlShortener&url=https%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FUltra_basse_fr%25C3%25A9quence"><span>Obtenir l'URL raccourcie</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Sp%C3%A9cial:QrCode&url=https%3A%2F%2Ffr.wikipedia.org%2Fwiki%2FUltra_basse_fr%25C3%25A9quence"><span>Télécharger le code QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprimer / exporter </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Sp%C3%A9cial:Livre&bookcmd=book_creator&referer=Ultra+basse+fr%C3%A9quence"><span>Créer un livre</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Sp%C3%A9cial:DownloadAsPdf&page=Ultra_basse_fr%C3%A9quence&action=show-download-screen"><span>Télécharger comme PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&printable=yes" title="Version imprimable de cette page [p]" accesskey="p"><span>Version 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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">Apparence</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">déplacer vers la barre latérale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">masquer</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">Un article de Wikipédia, l'encyclopédie libre.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirigé depuis <a href="/w/index.php?title=ULF&redirect=no" class="mw-redirect" title="ULF">ULF</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="fr" dir="ltr"><div class="bandeau-container metadata bandeau-article bandeau-niveau-ebauche"><div class="bandeau-cell bandeau-icone" style="display:table-cell;padding-right:0.5em"><span class="noviewer" typeof="mw:File"><a href="/wiki/Fichier:Circle-icons-bolt.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/Circle-icons-bolt.svg/35px-Circle-icons-bolt.svg.png" decoding="async" width="35" height="35" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/Circle-icons-bolt.svg/53px-Circle-icons-bolt.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/77/Circle-icons-bolt.svg/70px-Circle-icons-bolt.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></div><div class="bandeau-cell" style="display:table-cell;padding-right:0.5em"> <p><strong class="bandeau-titre">Cet article est une <a href="/wiki/Aide:%C3%89bauche" title="Aide:Ébauche">ébauche</a> concernant l’<a href="/wiki/%C3%89lectromagn%C3%A9tisme" title="Électromagnétisme">électromagnétisme</a>.</strong> </p> <div class="nomobile"> Vous pouvez partager vos connaissances en l’améliorant (<b><a href="/wiki/Aide:Comment_modifier_une_page" title="Aide:Comment modifier une page">comment ?</a></b>) selon les recommandations des <a href="/wiki/Projet:Accueil" title="Projet:Accueil">projets correspondants</a>.</div> </div></div> <div class="bandeau-container metadata homonymie hatnote"><div class="bandeau-cell bandeau-icone" style="display:table-cell;padding-right:0.5em"><span class="noviewer" typeof="mw:File"><a href="/wiki/Aide:Homonymie" title="Aide:Homonymie"><img alt="Page d’aide sur l’homonymie" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/20px-Logo_disambig.svg.png" decoding="async" width="20" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/30px-Logo_disambig.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/40px-Logo_disambig.svg.png 2x" data-file-width="512" data-file-height="375" /></a></span></div><div class="bandeau-cell" style="display:table-cell;padding-right:0.5em"> <p>Pour les articles homonymes, voir <a href="/wiki/Fr%C3%A9quence_(homonymie)" class="mw-disambig" title="Fréquence (homonymie)">fréquence (homonymie)</a>. </p> </div></div> <p>On appelle <b>ultra basse fréquence</b> (ULF), <i>Ultra low frequency</i> en anglais, la <a href="/wiki/Bande_de_fr%C3%A9quences" title="Bande de fréquences">bande</a> de <a href="/wiki/Onde_radio" title="Onde radio">radiofréquences</a> qui s'étend de 300 à 3 000 <abbr class="abbr" title="hertz"><a href="/wiki/Hertz" title="Hertz">Hz</a></abbr> <sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite_crochet">[</span>1<span class="cite_crochet">]</span></a></sup> (<a href="/wiki/Longueur_d%27onde" title="Longueur d'onde">longueur d'onde</a> de 100 à 1 000 <abbr class="abbr" title="kilomètre"><a href="/wiki/Kilom%C3%A8tre" title="Kilomètre">km</a></abbr>). </p><p>Quand il ne s'agit pas d'ondes radioélectriques, ces fréquences sont appelées aussi « fréquences vocales » et correspondent à la bande passante utilisée en <a href="/wiki/Radiot%C3%A9l%C3%A9phonie" title="Radiotéléphonie">radiotéléphonie</a> ou <a href="/wiki/T%C3%A9l%C3%A9phonie" title="Téléphonie">téléphonie</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Ondes_ULF_naturelles">Ondes ULF naturelles</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit&section=1" title="Modifier la section : Ondes ULF naturelles" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit&section=1" title="Modifier le code source de la section : Ondes ULF naturelles"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>De nombreuses émissions naturelles dans le spectre ULF sont observables dans la <a href="/wiki/Magn%C3%A9tosph%C3%A8re" title="Magnétosphère">magnétosphère</a> et sur Terre. Ces ondes traduisent d’importants phénomènes dans le proche <a href="/wiki/Physique_des_plasmas" title="Physique des plasmas">plasma</a> terrestre. Ces émissions sont associées en général aux <a href="/wiki/Onde_d%27Alfv%C3%A9n" title="Onde d'Alfvén">ondes d'Alfvén</a>, fonction du champ magnétique ambiant et de la densité de plasma. </p><p>Des stations de surveillance ont noté que des <a href="/wiki/Tremblement_de_terre" class="mw-redirect" title="Tremblement de terre">séismes</a> ont parfois été précédés de pics d’activité en ULF. Un exemple significatif est le <a href="/wiki/Tremblement_de_terre_de_Loma_Prieta" class="mw-redirect" title="Tremblement de terre de Loma Prieta">séisme de Californie de 1989</a>. La recherche se poursuit sur ces corrélations, pour développer par ce moyen un système d’alerte. </p> <div class="mw-heading mw-heading2"><h2 id="Applications_en_télécommunications"><span id="Applications_en_t.C3.A9l.C3.A9communications"></span>Applications en télécommunications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit&section=2" title="Modifier la section : Applications en télécommunications" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit&section=2" title="Modifier le code source de la section : Applications en télécommunications"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Les ULF semblent avoir été utilisées pour des communications militaires grâce à leurs propriétés permettant de traverser la <a href="/wiki/Terre" title="Terre">Terre</a> mais ce sont les bandes <a href="/wiki/Super_basse_fr%C3%A9quence" title="Super basse fréquence">SLF</a> plus basses qui furent utilisées opérationnellement. Des publications du Groupe consultatif pour la recherche et les réalisations aérospatiales (rebaptisé Agence pour la recherche et la technologie dans le cadre de l'Organisation <a href="/wiki/Organisation_du_trait%C3%A9_de_l%27Atlantique_nord" title="Organisation du traité de l'Atlantique nord">OTAN</a> pour la recherche et la technologie - RTO) datant des années 1960 détaillent des systèmes utilisant ces ondes. </p><p>Des systèmes à ces fréquences sont utilisés dans les mines<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite_crochet">[</span>2<span class="cite_crochet">]</span></a></sup>. </p><p>Des <a href="/wiki/Radioamateur" title="Radioamateur">radioamateurs</a> communiquent en ULF à l’aide d’amplificateurs audio connectés à une paire de longs fils enterrés. La réception du courant très faible transmis se fait à l’aide d’une autre paire d’électrodes, un amplificateur à faible bruit et un ordinateur muni de logiciels de filtrage à bande très étroite. Des transmissions à plusieurs kilomètres sont possibles avec un amplificateur de 10 à 100 <abbr class="abbr" title="watt">W</abbr> et des électrodes de 10 à 50 <abbr class="abbr" title="mètre">m</abbr>. </p> <div class="mw-heading mw-heading2"><h2 id="Voir_aussi">Voir aussi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit&section=3" title="Modifier la section : Voir aussi" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit&section=3" title="Modifier le code source de la section : Voir aussi"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Articles_connexes">Articles connexes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit&section=4" title="Modifier la section : Articles connexes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit&section=4" title="Modifier le code source de la section : Articles connexes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Extr%C3%AAmement_basse_fr%C3%A9quence" title="Extrêmement basse fréquence">Extrêmement basse fréquence</a> </p> <div class="mw-heading mw-heading2"><h2 id="Sources">Sources</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit&section=5" title="Modifier la section : Sources" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit&section=5" title="Modifier le code source de la section : Sources"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> Cet article est partiellement ou en totalité issu de l’article de Wikipédia en anglais intitulé <span class="plainlinks">« <a class="external text" href="https://en.wikipedia.org/wiki/Ultra_low_frequency?oldid=189279889">Ultra low frequency</a> » <small>(<a class="external text" href="https://en.wikipedia.org/wiki/Ultra_low_frequency?action=history">voir la liste des auteurs</a>)</small></span>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes_et_références"><span id="Notes_et_r.C3.A9f.C3.A9rences"></span>Notes et références</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&veaction=edit&section=6" title="Modifier la section : Notes et références" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Ultra_basse_fr%C3%A9quence&action=edit&section=6" title="Modifier le code source de la section : Notes et références"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small decimal" style=""><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a> </span><span class="reference-text"><a rel="nofollow" class="external text" href="http://www.itu.int/dms_pubrec/itu-r/rec/v/R-REC-V.431-7-200005-I!!MSW-E.doc">RECOMMENDATION ITU-R V.431-7</a></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a> </span><span class="reference-text"><a rel="nofollow" class="external text" href="http://www.weather.nps.navy.mil/~psguest/EMEO_online/module3/module_3_1.html">HF and Lower Frequency Radiation - Introduction</a></span> </li> </ol></div> </div> <div class="navbox-container" style="clear:both;"> <table class="navbox collapsible noprint autocollapse" style=""> <tbody><tr><th class="navbox-title" colspan="2" style=""><div style="float:left; width:6em; text-align:left"><div class="noprint plainlinks nowrap tnavbar" style="padding:0; font-size:xx-small; color:var(--color-emphasized, #000000);"><a href="/wiki/Mod%C3%A8le:Palette_Spectre_radiofr%C3%A9quence" title="Modèle:Palette Spectre radiofréquence"><abbr class="abbr" title="Voir ce modèle.">v</abbr></a> · <a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Mod%C3%A8le:Palette_Spectre_radiofr%C3%A9quence&action=edit"><abbr class="abbr" title="Modifier ce modèle. Merci de prévisualiser avant de sauvegarder.">m</abbr></a></div></div><div style="font-size:110%"><a href="/wiki/Onde_radio" title="Onde radio">Spectre radiofréquence</a></div></th> </tr> <tr> <td class="navbox-list" style="" colspan="2"><div class="liste-horizontale"> <ul><li><small>3 Hz</small></li> <li><a href="/wiki/Extr%C3%AAmement_basse_fr%C3%A9quence" title="Extrêmement basse fréquence">ELF</a></li> <li><small>30 Hz</small></li> <li><a href="/wiki/Super_basse_fr%C3%A9quence" title="Super basse fréquence">SLF</a></li> <li><small>300 Hz</small></li> <li><a class="mw-selflink selflink">ULF</a></li> <li><small>3 kHz</small></li> <li><a href="/wiki/Tr%C3%A8s_basse_fr%C3%A9quence" title="Très basse fréquence">VLF</a></li> <li><small>30 kHz</small></li> <li><a href="/wiki/Basse_fr%C3%A9quence" title="Basse fréquence">LF</a></li> <li><small>300 kHz</small></li> <li><a href="/wiki/Moyenne_fr%C3%A9quence" title="Moyenne fréquence">MF</a></li> <li><small>3 MHz</small></li> <li><a href="/wiki/Haute_fr%C3%A9quence" title="Haute fréquence">HF</a></li> <li><small>30 MHz</small></li> <li><a href="/wiki/Tr%C3%A8s_haute_fr%C3%A9quence" title="Très haute fréquence">VHF</a></li> <li><small>300 MHz</small></li> <li><a href="/wiki/Ultra_haute_fr%C3%A9quence" title="Ultra haute fréquence">UHF</a></li> <li><small>3 GHz</small></li> <li><a href="/wiki/Supra-haute_fr%C3%A9quence" title="Supra-haute fréquence">SHF</a></li> <li><small>30 GHz</small></li> <li><a href="/wiki/Extr%C3%AAmement_haute_fr%C3%A9quence" title="Extrêmement haute fréquence">EHF</a></li> <li><small>300 GHz</small></li> <li><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THF</a></li> <li><small>3 THz</small></li></ul> </div></td> </tr> <tr> <td class="navbox-banner" style="" colspan="2"><div class="liste-horizontale"><a href="/wiki/Spectre_%C3%A9lectromagn%C3%A9tique" title="Spectre électromagnétique">Spectre électromagnétique</a> : <ul><li><a href="/wiki/Radio%C3%A9lectricit%C3%A9" title="Radioélectricité">Radioélectricité</a></li> <li><a href="/wiki/Onde_radio" title="Onde radio">Spectre radiofréquence</a></li> <li><a href="/wiki/Bandes_de_fr%C3%A9quences_de_la_t%C3%A9l%C3%A9vision_terrestre" title="Bandes de fréquences de la télévision terrestre">Bandes VHF-UHF</a></li> <li><a href="/wiki/Micro-onde" title="Micro-onde">Spectre micro-ondes</a></li> <li><a href="/wiki/Attribution_des_fr%C3%A9quences" title="Attribution des fréquences">Attribution des fréquences</a></li></ul> </div></td></tr></tbody></table> <table class="navbox collapsible noprint autocollapse" style="background:#fdfdfd;"> <tbody><tr><th class="navbox-title" colspan="2" style=""><div style="float:left; width:6em; text-align:left"><div class="noprint plainlinks nowrap tnavbar" style="padding:0; font-size:xx-small; color:var(--color-emphasized, #000000);"><a href="/wiki/Mod%C3%A8le:Palette_Spectre_%C3%A9lectromagn%C3%A9tique" title="Modèle:Palette Spectre électromagnétique"><abbr class="abbr" title="Voir ce modèle.">v</abbr></a> · <a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Mod%C3%A8le:Palette_Spectre_%C3%A9lectromagn%C3%A9tique&action=edit"><abbr class="abbr" title="Modifier ce modèle. Merci de prévisualiser avant de sauvegarder.">m</abbr></a></div></div><div style="font-size:110%"><a href="/wiki/Spectre_%C3%A9lectromagn%C3%A9tique" title="Spectre électromagnétique">Spectre électromagnétique</a></div></th> </tr> <tr> <td class="navbox-banner" style="background:#ddddff; line-height:1.3em; padding:0.3em; font-size:94%;" colspan="2"><div class="liste-horizontale"> <ul><li><b><a href="/wiki/Rayon_gamma" title="Rayon gamma">Rayons gamma</a></b></li> <li><b><a href="/wiki/Rayon_X" title="Rayon X">Rayons X</a></b></li> <li><b><a href="/wiki/Ultraviolet" title="Ultraviolet">Ultraviolet</a></b></li> <li><b><a href="/wiki/Spectre_visible" title="Spectre visible">Visible</a></b></li> <li><b><a href="/wiki/Infrarouge" title="Infrarouge">Infrarouge</a></b></li> <li><b><a href="/wiki/T%C3%A9rahertz" title="Térahertz">Térahertz</a></b></li> <li><b><a href="/wiki/Micro-onde" title="Micro-onde">Micro-ondes</a></b></li> <li><b><a href="/wiki/Onde_radio" title="Onde radio">Ondes radio</a></b></li></ul> </div> <p><big>←</big> <a href="/wiki/Haute_fr%C3%A9quence" title="Haute fréquence">Hautes fréquences</a>          <a href="/wiki/Basse_fr%C3%A9quence" title="Basse fréquence">Basses fréquences</a> <big>→</big> </p> <figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/Fichier:Frequency_vs._wave_length.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/500px-Frequency_vs._wave_length.svg.png" decoding="async" width="500" height="65" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/750px-Frequency_vs._wave_length.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/1000px-Frequency_vs._wave_length.svg.png 2x" data-file-width="800" data-file-height="104" /></a><figcaption></figcaption></figure> <big>←</big> Faibles <a href="/wiki/Longueur_d%27onde" title="Longueur d'onde">longueurs d'onde</a>          Grandes <a href="/wiki/Longueur_d%27onde" title="Longueur d'onde">longueurs d'onde</a> <big>→</big></td> </tr> <tr> <th class="navbox-group" style="width:100px;text-align:right;font-size:94%;"><a href="/wiki/Ultraviolet" title="Ultraviolet">Ultraviolets</a></th> <td class="navbox-list" style="font-size:94%;;"><div class="liste-horizontale"> <ul><li><a href="/wiki/Ultraviolet#UV-A_(400-315_nm)" title="Ultraviolet">UV-A</a></li> <li><a href="/wiki/Ultraviolet#UV-B_(315-280_nm)" title="Ultraviolet">UV-B</a></li> <li><a href="/wiki/Ultraviolet#UV-C_(280-100_nm)" title="Ultraviolet">UV-C</a></li> <li><a href="/wiki/Rayonnement_ultraviolet_extr%C3%AAme" title="Rayonnement ultraviolet extrême">Extrême</a></li></ul> </div> <div class="liste-horizontale"> <ul><li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande U</a></li></ul> </div></td> </tr> <tr> <th class="navbox-group" style="width:100px;text-align:right;font-size:94%;"><a href="/wiki/Spectre_visible" title="Spectre visible">Lumière visible</a></th> <td class="navbox-list navbox-even" style="font-size:94%;; background:#f7f7f7;"><div class="liste-horizontale"> <ul><li><a href="/wiki/Violet" title="Violet">Violet</a></li> <li><a href="/wiki/Bleu" title="Bleu">Bleu</a></li> <li><a href="/wiki/Vert" title="Vert">Vert</a></li> <li><a href="/wiki/Jaune" title="Jaune">Jaune</a></li> <li><a href="/wiki/Orange_(couleur)" title="Orange (couleur)">Orange</a></li> <li><a href="/wiki/Rouge" title="Rouge">Rouge</a></li></ul> </div> <div class="liste-horizontale"> <ul><li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande B</a></li> <li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande V</a></li> <li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande R</a></li></ul> </div></td> </tr> <tr> <th class="navbox-group" style="width:100px;text-align:right;font-size:94%;"><a href="/wiki/Infrarouge" title="Infrarouge">Infrarouges</a></th> <td class="navbox-list" style="font-size:94%;;"><div class="liste-horizontale"> <ul><li><a href="/wiki/Infrarouge" title="Infrarouge">Infrarouge proche</a></li> <li><a href="/wiki/Infrarouge" title="Infrarouge">Infrarouge moyen</a></li> <li><a href="/wiki/Infrarouge_lointain" title="Infrarouge lointain">Infrarouge lointain</a></li></ul> </div> <div class="liste-horizontale"> <ul><li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande I</a></li> <li><a href="/w/index.php?title=Bande_Y&action=edit&redlink=1" class="new" title="Bande Y (page inexistante)">Bande Y</a></li> <li><a href="/wiki/Bande_J" title="Bande J">Bande J</a></li> <li><a href="/wiki/Bande_H" title="Bande H">Bande H</a></li> <li><a href="/wiki/Bande_K_(infrarouge)" title="Bande K (infrarouge)">Bande K</a></li> <li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande L</a></li> <li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande M</a></li> <li><a href="/wiki/Bande_N" title="Bande N">Bande N</a></li> <li><a href="/wiki/Syst%C3%A8me_photom%C3%A9trique#Système_photométrique_UBVRIJHKLMNQ" title="Système photométrique">Bande Q</a></li></ul> </div></td> </tr> <tr> <th class="navbox-group" style="width:100px;text-align:right;font-size:94%;"><a href="/wiki/Micro-onde" title="Micro-onde">Micro-ondes</a></th> <td class="navbox-list navbox-even" style="font-size:94%;; background:#f7f7f7;"><div class="liste-horizontale"> <ul><li><a href="/wiki/Bande_W" title="Bande W">Bande W</a></li> <li><a href="/wiki/Bande_V_(micro-ondes)" title="Bande V (micro-ondes)">Bande V</a></li> <li><a href="/wiki/Bande_U_(micro-ondes)" title="Bande U (micro-ondes)">Bande U</a></li> <li><a href="/wiki/Bande_Q_(micro-ondes)" title="Bande Q (micro-ondes)">Bande Q</a></li> <li><a href="/wiki/Bande_Ka" title="Bande Ka">Bande Ka</a></li> <li><a href="/wiki/Bande_K_(micro-ondes)" title="Bande K (micro-ondes)">Bande K</a></li> <li><a href="/wiki/Bande_Ku" title="Bande Ku">Bande Ku</a></li> <li><a href="/wiki/Bande_X" title="Bande X">Bande X</a></li> <li><a href="/wiki/Bande_C" title="Bande C">Bande C</a></li> <li><a href="/wiki/Bande_S" title="Bande S">Bande S</a></li> <li><a href="/wiki/Bande_L_(radio)" title="Bande L (radio)">Bande L</a></li></ul> </div></td> </tr> <tr> <th class="navbox-group" style="width:100px;text-align:right;font-size:94%;"><a href="/wiki/Onde_radio" title="Onde radio">Ondes radio</a></th> <td class="navbox-list" style="font-size:94%;;"><div class="liste-horizontale"> <ul><li><a href="/wiki/Extr%C3%AAmement_basse_fr%C3%A9quence" title="Extrêmement basse fréquence">ELF</a></li> <li><a href="/wiki/Super_basse_fr%C3%A9quence" title="Super basse fréquence">SLF</a></li> <li><a class="mw-selflink selflink">ULF</a></li> <li><a href="/wiki/Tr%C3%A8s_basse_fr%C3%A9quence" title="Très basse fréquence">VLF</a></li> <li><a href="/wiki/Basse_fr%C3%A9quence" title="Basse fréquence">LF</a></li> <li><a href="/wiki/Moyenne_fr%C3%A9quence" title="Moyenne fréquence">MF</a></li> <li><a href="/wiki/Haute_fr%C3%A9quence" title="Haute fréquence">HF</a></li> <li><a href="/wiki/Tr%C3%A8s_haute_fr%C3%A9quence" title="Très haute fréquence">VHF</a></li> <li><a href="/wiki/Ultra_haute_fr%C3%A9quence" title="Ultra haute fréquence">UHF</a></li> <li><a href="/wiki/Supra-haute_fr%C3%A9quence" title="Supra-haute fréquence">SHF</a></li> <li><a href="/wiki/Extr%C3%AAmement_haute_fr%C3%A9quence" title="Extrêmement haute fréquence">EHF</a></li></ul> </div> <table class="navbox-subgroup" style=""> <tbody><tr> <th class="navbox-group" style="width:100px;"><a href="/wiki/T%C3%A9l%C3%A9vision_analogique_terrestre" title="Télévision analogique terrestre">Télévision terrestre</a></th> <td class="navbox-list" style="text-align:left;;"><div class="liste-horizontale"> <ul><li><a href="/wiki/Bandes_de_fr%C3%A9quences_de_la_t%C3%A9l%C3%A9vision_terrestre#VHF_bande_I" title="Bandes de fréquences de la télévision terrestre">Bande I</a></li> <li><a href="/wiki/Bandes_de_fr%C3%A9quences_de_la_t%C3%A9l%C3%A9vision_terrestre#UHF_bande_IV" title="Bandes de fréquences de la télévision terrestre">Bande IV</a></li> <li><a href="/wiki/Bandes_de_fr%C3%A9quences_de_la_t%C3%A9l%C3%A9vision_terrestre#UHF_bande_V" title="Bandes de fréquences de la télévision terrestre">Bande V</a></li></ul> </div></td> </tr> </tbody></table> <table class="navbox-subgroup" style=""> <tbody><tr> <th class="navbox-group" style="width:100px;"><a href="/wiki/Radiodiffusion" title="Radiodiffusion">Radiodiffusion</a></th> <td class="navbox-list navbox-even" style="text-align:left;;"><div class="liste-horizontale"> <ul><li><a href="/wiki/Basse_fr%C3%A9quence" title="Basse fréquence">Basse fréquence</a>/Grandes ondes</li> <li><a href="/wiki/Moyenne_fr%C3%A9quence" title="Moyenne fréquence">Moyenne fréquence</a>/Ondes moyennes</li> <li><a href="/wiki/Haute_fr%C3%A9quence" title="Haute fréquence">Haute fréquence</a>/Ondes courtes</li></ul> </div></td> </tr> </tbody></table></td> </tr> <tr> <td class="navbox-list navbox-even" style="font-size:94%;; background:#f7f7f7;" colspan="2"> <table class="mw-collapsible mw-collapsed" style="width:100%; border-collapse:collapse; text-align:center;"> <caption><b>Spectre électromagnétique en détail</b>   </caption> <tbody><tr style="font-size:0.915em"> <th colspan="1" style="border:1px solid"><a href="/wiki/Fr%C3%A9quence" title="Fréquence">Fréquence</a><br /><a href="/wiki/Longueur_d%27onde" title="Longueur d'onde">Longueur d’onde</a> </th> <td colspan="2" style="border-width:1px 0; border-style:solid;">9 <abbr class="abbr" title="kilohertz"><a href="/wiki/Kilohertz" class="mw-redirect" title="Kilohertz">kHz</a></abbr><br />33 <abbr class="abbr" title="kilomètre"><a href="/wiki/Kilom%C3%A8tre" title="Kilomètre">km</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid; text-align:center;">1 <abbr class="abbr" title="gigahertz"><a href="/wiki/Gigahertz" class="mw-redirect" title="Gigahertz">GHz</a></abbr><br />30 <abbr class="abbr" title="centimètre"><a href="/wiki/Centim%C3%A8tre" title="Centimètre">cm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">300 <abbr class="abbr" title="gigahertz"><a href="/wiki/Gigahertz" class="mw-redirect" title="Gigahertz">GHz</a></abbr><br />1 <abbr class="abbr" title="millimètre"><a href="/wiki/Millim%C3%A8tre" title="Millimètre">mm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">3 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />100 <abbr class="abbr" title="micromètre"><a href="/wiki/Microm%C3%A8tre" title="Micromètre">µm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">405 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />745 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">480 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />625 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">508 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />590 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">530 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />565 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">577 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />520 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">612 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />490 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">690 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />435 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">750 <abbr class="abbr" title="térahertz"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">THz</a></abbr><br />400 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">30 <abbr class="abbr" title="pétahertz"><a href="/wiki/P%C3%A9tahertz" class="mw-redirect" title="Pétahertz">PHz</a></abbr><br />10 <abbr class="abbr" title="nanomètre"><a href="/wiki/Nanom%C3%A8tre" title="Nanomètre">nm</a></abbr> </td> <td colspan="1" style="border-width:1px 0; border-style:solid;">  </td> <td colspan="2" style="border-width:1px 0; border-style:solid;">30 <abbr class="abbr" title="exahertz"><a href="/wiki/Exahertz" class="mw-redirect" title="Exahertz">EHz</a></abbr><br />5 <abbr class="abbr" title="picomètre"><a href="/wiki/Picom%C3%A8tre" title="Picomètre">pm</a></abbr> </td> <td colspan="1" style="border:1px solid;border-left:none">  </td></tr> <tr style="font-size:0.9em"> <th colspan="1" rowspan="2" style="border:1px solid"><b><a href="/wiki/Bande_de_fr%C3%A9quences" title="Bande de fréquences">Bande</a></b> </th> <td colspan="1" rowspan="2" style="border:1px solid;background:#eeeeee">  </td> <td colspan="3" rowspan="2" style="border:1px solid"><a href="/wiki/Onde_radio" title="Onde radio">ondes radio</a> </td> <td colspan="3" style="border:1px solid"><a href="/wiki/Micro-onde" title="Micro-onde">micro-ondes</a> </td> <td colspan="3" style="border:1px solid"><a href="/wiki/T%C3%A9rahertz" title="Térahertz">térahertz</a> </td> <td colspan="3" rowspan="2" style="border:1px solid;background:#775555"><a href="/wiki/Infrarouge" title="Infrarouge"><span style="color:#00ffff">infrarouge</span></a> </td> <td colspan="3" style="border:1px solid;background:#ff0000"><a href="/wiki/Rouge" title="Rouge"><span style="color:#00ffff">rouge</span></a> </td> <td colspan="3" style="border:1px solid;background:#ff7f00"><a href="/wiki/Orange_(couleur)" title="Orange (couleur)"><span style="color:#00ffff">orange</span></a> </td> <td colspan="3" style="border:1px solid;background:#ffff00"><a href="/wiki/Jaune" title="Jaune"><span style="color:#007f7f">jaune</span></a> </td> <td colspan="3" style="border:1px solid;background:#00ef00"><a href="/wiki/Vert" title="Vert"><span style="color:#003f3f">vert</span></a> </td> <td colspan="3" style="border:1px solid;background:#00ffff"><a href="/wiki/Cyan" title="Cyan"><span style="color:#003f3f">cyan</span></a> </td> <td colspan="3" style="border:1px solid;background:#0000ff"><a href="/wiki/Bleu" title="Bleu"><span style="color:#00ffff">bleu</span></a> </td> <td colspan="3" style="border:1px solid;background:#9f00ff"><a href="/wiki/Violet" title="Violet"><span style="color:#00ffff">violet</span></a> </td> <td colspan="3" style="border:1px solid;background:#220033"><a href="/wiki/Ultraviolet" title="Ultraviolet"><span style="color:#00ffff">ultraviolet</span></a> </td> <td colspan="3" style="border:1px solid"><a href="/wiki/Rayon_X" title="Rayon X"><span style="color:#0000ff">rayons X</span></a> </td> <td colspan="3" style="border:1px solid"><a href="/wiki/Rayon_gamma" title="Rayon gamma"><span style="color:#0000ff">rayons γ</span></a> </td></tr> <tr style="font-size:0.9em"> <td colspan="6" style="border:1px solid"><i>rayonnements pénétrants</i> </td> <td colspan="21" style="border:1px solid;background:#ffffff"><a href="/wiki/Spectre_visible" title="Spectre visible"><span style="color:#0000ff">lumière visible</span></a> </td> <td colspan="9" style="border:1px solid"><i><a href="/wiki/Rayonnement_ionisant" title="Rayonnement ionisant"><span style="color:#0000ff">rayonnements ionisants</span></a></i> </td></tr></tbody></table></td> </tr> <tr> <td class="navbox-banner" style="background:#ddddff; 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