{"id":62670,"date":"2024-02-27T12:20:44","date_gmt":"2024-02-27T10:20:44","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=62670"},"modified":"2024-02-27T12:20:44","modified_gmt":"2024-02-27T10:20:44","slug":"these-sabat-r-propriete-de-couplage-dans-les-metasurfaces-acoustiques-basees-sur-des-resonateurs-de-helmholtz-pour-le-controle-du-son-a-basses-frequences","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/these-2023\/these-sabat-r-propriete-de-couplage-dans-les-metasurfaces-acoustiques-basees-sur-des-resonateurs-de-helmholtz-pour-le-controle-du-son-a-basses-frequences.html","title":{"rendered":"THESE : SABAT R. &#8211; Propri\u00e9t\u00e9 de couplage dans les m\u00e9tasurfaces acoustiques bas\u00e9es sur des r\u00e9sonateurs de Helmholtz pour le contr\u00f4le du son \u00e0 basses fr\u00e9quences"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_7ahpiazky2o8\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-62670'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lt47rx2p-0bd7a209e59fea1337bcee51f93ba832\">\n#top .av-special-heading.av-lt47rx2p-0bd7a209e59fea1337bcee51f93ba832{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-lt47rx2p-0bd7a209e59fea1337bcee51f93ba832 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-lt47rx2p-0bd7a209e59fea1337bcee51f93ba832 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-lt47rx2p-0bd7a209e59fea1337bcee51f93ba832 av-special-heading-h2  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : SABAT R. &#8211; Propri\u00e9t\u00e9 de couplage dans les m\u00e9tasurfaces acoustiques bas\u00e9es sur des r\u00e9sonateurs de Helmholtz pour le contr\u00f4le du son \u00e0 basses fr\u00e9quences <\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-2f4600354c0449b610997916bbd9b6bc'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-68e036126b913e5028f77311dc66b825\">\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825{\ncolor:#bfbfbf;\nborder-color:#bfbfbf;\n}\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825 .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-68e036126b913e5028f77311dc66b825 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<p><strong>SABAT R.<br \/>\n<\/strong><\/p>\n<p>Soutenance : 11 Octobre 2023<strong><br \/>\n<\/strong>IEMN Amphitheatre - Central Laboratory - Villeneuve d'Ascq<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-628129dba2299b2ecd65ebfc92eac29d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5><strong><span style=\"color: #800000;\">Jury :<\/span><\/strong><\/h5>\n<h5>Summary:<\/h5>\n<p>Les derni\u00e8res d\u00e9cennies ont vu l\u2019augmentation ind\u00e9sirable de nuisances sonores, surtout aux basses fr\u00e9quences, d\u00fb au fait d&rsquo;augmentation importantes des sources de bruit li\u00e9 au d\u00e9veloppement des activit\u00e9s humaines. Celles-ci exigent des solutions d\u2019isolation innovantes car l\u2019existant s\u2019appuie sur des dispositifs \u00e9pais qui posent des probl\u00e8mes d\u2019int\u00e9gration. La d\u00e9couverte r\u00e9cente des m\u00e9tasurfaces acoustiques repr\u00e9sente une r\u00e9ponse ad\u00e9quate, notamment les structures localement r\u00e9sonantes bas\u00e9es sur des r\u00e9sonateurs de Helmholtz (HR). Ce type de r\u00e9sonateur a gagn\u00e9 en popularit\u00e9 dans la manipulation du son \u00e0 basse fr\u00e9quence en raison de la simplicit\u00e9 de son concept et de sa fabrication. L&rsquo;objectif de cette th\u00e8se est de concevoir num\u00e9riquement et de valider exp\u00e9rimentalement une m\u00e9tasurface acoustique compos\u00e9e d\u2019unit\u00e9s de r\u00e9sonateurs de Helmholtz pr\u00e9sentant une \u00e9paisseur inf\u00e9rieure \u00e0 la longueur d&rsquo;onde, fonctionnant comme isolateur phonique pour les sons \u00e0 basses fr\u00e9quences. Pour am\u00e9liorer l&rsquo;efficacit\u00e9 de l&rsquo;isolation, le d\u00e9fi a \u00e9t\u00e9 d&rsquo;\u00e9largir la bande \u00e9troite de la r\u00e9ponse fr\u00e9quentielle. Ainsi, l&rsquo;\u00e9tude s&rsquo;est concentr\u00e9e sur l&rsquo;analyse du comportement des r\u00e9sonateurs de Helmholtz dans les champs proches et lointains, en mettant l&rsquo;accent sur le couplage des unit\u00e9s HR, ce qui offre de nouvelles possibilit\u00e9s d&rsquo;absorption aux basses fr\u00e9quences. En utilisant la m\u00e9thode num\u00e9rique des \u00e9l\u00e9ments finis avec le logiciel<\/p>\n<h5>Abstract:<\/h5>\n<p>Recent decades have seen an undesirable increase in noise nuisance, especially at low frequencies, due to the significant increase in noise sources linked to the development of human activities. These require innovative insulation solutions, as existing systems are based on thick devices that pose integration problems. The recent discovery of acoustic metasurfaces represents an appropriate response, in particular locally resonant structures based on Helmholtz resonators (HR). This type of resonator has gained popularity in low-frequency sound manipulation due to the simplicity of its design and fabrication. The aim of this thesis is to numerically design and experimentally validate an acoustic metasurface composed of Helmholtz resonator units with a thickness less than the wavelength, functioning as a sound isolator for low-frequency sound. To improve the effectiveness of the insulation, the challenge was to widen the narrow band of the frequency response. The study therefore focused on analysing the behaviour of Helmholtz resonators in the near and far fields, with particular emphasis on the coupling of HR units, which offers new possibilities for absorption at low frequencies. Using the numerical finite element method with the<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[318],"tags":[],"class_list":["post-62670","post","type-post","status-publish","format-standard","hentry","category-these-2023"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/62670","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=62670"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/62670\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=62670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=62670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=62670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}