{"id":159025,"date":"2021-07-21T09:10:58","date_gmt":"2021-07-21T07:10:58","guid":{"rendered":"https:\/\/bandelin.com\/?post_type=docs&#038;p=159025"},"modified":"2025-09-30T00:50:17","modified_gmt":"2025-09-29T22:50:17","password":"","slug":"ultrason-une-breve-introduction","status":"publish","type":"docs","link":"https:\/\/bandelin.com\/fr\/docs\/wissen\/ultraschall-eine-kurze-einfuehrung\/","title":{"rendered":"Les ultrasons - une br\u00e8ve introduction"},"content":{"rendered":"<div class=\"product\"><div class=\"product\">\n<p>Les ultrasons sont utilis\u00e9s en science et en ing\u00e9nierie pour des applications tr\u00e8s vari\u00e9es. Les paragraphes suivants d\u00e9crivent bri\u00e8vement les principes physiques des ultrasons.&nbsp;<\/p>\n\n\n\n<p>Lorsque des ultrasons sont appliqu\u00e9s \u00e0 des milieux liquides \u00e0 partir d'une fr\u00e9quence de 20 kHz et d'une intensit\u00e9 sonore de 0,1 W\/cm\u00b2, de minuscules bulles de cavitation se forment en raison de la forte sollicitation altern\u00e9e. Ces tr\u00e8s fines cavit\u00e9s \u00e0 faible pression interne se forment en raison de l'inertie du fluide et des vibrations m\u00e9caniques induites. Sous l'effet de la pression externe du fluide, les bulles instables implosent apr\u00e8s une courte croissance sous des pics de pression et de temp\u00e9rature \u00e9lev\u00e9s. Il en r\u00e9sulte des forces de cisaillement \u00e9lev\u00e9es au niveau de la couche limite. Cet effet se produit en particulier sur les bulles d'air ou les particules de salet\u00e9, appel\u00e9es germes de cavitation. La cavitation dans l'eau d\u00e9clenche le bruit acoustiquement perceptible des appareils \u00e0 ultrasons haute performance.<\/p>\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"lyte-wrapper fourthree\" title=\"Nettoyage avec un bain \u00e0 ultrasons SONOREX de BANDELIN\" style=\"width:420px;max-width:100%;margin:5px;\"><div class=\"lyMe\" id=\"WYL_h0d6_Ur5poE\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\"><div><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/bandelin.com\/wp-content\/plugins\/wp-youtube-lyte\/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2Fh0d6_Ur5poE%2Fhqdefault.jpg\" \/><meta itemprop=\"embedURL\" content=\"https:\/\/www.youtube.com\/embed\/h0d6_Ur5poE\" \/><meta itemprop=\"duration\" content=\"PT2M7S\" \/><meta itemprop=\"uploadDate\" content=\"2015-02-04T16:33:08Z\" \/><\/div><div id=\"lyte_h0d6_Ur5poE\" data-src=\"https:\/\/bandelin.com\/wp-content\/plugins\/wp-youtube-lyte\/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2Fh0d6_Ur5poE%2Fhqdefault.jpg\" class=\"pL\"><div class=\"tC\"><div class=\"tT\" itemprop=\"name\">Nettoyage avec un bain \u00e0 ultrasons SONOREX de BANDELIN<\/div><\/div><button tabindex=\"0\" class=\"play\"><\/button><div class=\"ctrl\"><div class=\"Lctrl\"><\/div><div class=\"Rctrl\"><\/div><\/div><\/div><noscript><a href=\"https:\/\/youtu.be\/h0d6_Ur5poE\" rel=\"nofollow\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/bandelin.com\/wp-content\/plugins\/wp-youtube-lyte\/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2Fh0d6_Ur5poE%2F0.jpg\" alt=\"Nettoyage avec un bain \u00e0 ultrasons SONOREX de BANDELIN\" width=\"420\" height=\"295\" \/><br \/>Lire cette vid\u00e9o sur YouTube<\/a><\/noscript><meta itemprop=\"description\" content=\"Weitere Informationen zu den passenden Ultraschallb\u00e4dern und Pr\u00e4paraten finden Sie unter www.bandelin.com\"><\/div><\/div><div class=\"lL\" style=\"max-width:100%;width:420px;margin:5px;\"><br\/><span class=\"lyte_disclaimer\">En regardant les vid\u00e9os, vous acceptez la d\u00e9claration de confidentialit\u00e9 de YouTube.<\/span><\/div><figcaption><\/figcaption><\/figure><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Ultraschall wird in Wissenschaft und Technik f\u00fcr die vielf\u00e4ltigsten Anwendungen eingesetzt. Im Folgenden werden kurz die physikalischen Grundlagen des Ultraschalls beschrieben.&nbsp; Bei der Einwirkung von Ultraschall ab einer Frequenz von 20 kHz und einer Schallintensit\u00e4t von 0,1 W\/cm\u00b2 auf fl\u00fcssige Medien entstehen aufgrund der starken Wechselbeanspruchung kleinste Kavitationsblasen. Diese feinsten Hohlr\u00e4ume mit geringem Innendruck entstehen [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"doc_category":[1926],"doc_tag":[],"class_list":["post-159025","docs","type-docs","status-publish","hentry","doc_category-wissen"],"acf":[],"year_month":"2026-10","word_count":139,"total_views":"60","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"J Bandelin","author_nicename":"jobandelin","author_url":"https:\/\/bandelin.com\/fr\/author\/jobandelin\/"},"doc_category_info":[{"term_name":"Grundlagenwissen Kavitation","term_url":"https:\/\/bandelin.com\/fr\/docs-category\/wissen\/"}],"doc_tag_info":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ultraschall \u2013 kurze Einf\u00fchrung &amp; Grundlagen | BANDELIN<\/title>\n<meta name=\"description\" content=\"Informationen Sie sich \u00fcber Ultraschall - eine kurze Einf\u00fchrung | Hochwertige Ultraschallb\u00e4der f\u00fcr Medizin und Industrie von Bandelin Electronic seit 1955.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bandelin.com\/fr\/docs\/savoir\/ultrason-une-breve-introduction\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ultraschall \u2013 kurze Einf\u00fchrung &amp; Grundlagen | BANDELIN\" \/>\n<meta property=\"og:description\" content=\"Informationen Sie sich \u00fcber Ultraschall - eine kurze Einf\u00fchrung | Hochwertige Ultraschallb\u00e4der f\u00fcr Medizin und Industrie von Bandelin Electronic seit 1955.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/bandelin.com\/fr\/docs\/savoir\/ultrason-une-breve-introduction\/\" \/>\n<meta property=\"og:site_name\" content=\"BANDELIN electronic GmbH &amp; Co. 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