{"id":76006,"date":"2025-12-04T14:51:09","date_gmt":"2025-12-04T12:51:09","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=76006"},"modified":"2025-12-19T15:33:39","modified_gmt":"2025-12-19T13:33:39","slug":"acoustic-test-basin","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/acoustic-test-basin.html","title":{"rendered":"Acoustic test tank: An essential metrology tool for research and industry!"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mir4fogy-416406f0f66dcd48c4c18e737ed185cb\">\n.flex_column.av-mir4fogy-416406f0f66dcd48c4c18e737ed185cb{\nborder-width:15px;\nborder-color:#77b392;\nborder-style:solid;\nborder-radius:15px 15px 15px 15px;\nbackground-color:#77b392;\n}\n<\/style>\n<div  class='flex_column av-mir4fogy-416406f0f66dcd48c4c18e737ed185cb av_one_full  avia-builder-el-0  el_before_av_two_fifth  avia-builder-el-first  first flex_column_div'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mir4cpj7-3957199dd9186121f74062d77f42777e\">\n#top .av_textblock_section.av-mir4cpj7-3957199dd9186121f74062d77f42777e .avia_textblock{\nfont-size:15px;\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-mir4cpj7-3957199dd9186121f74062d77f42777e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2 style=\"font-weight: 400; text-align: center;\"><strong><span style=\"color: #ffffff;\">Acoustic test tank:<br \/>\nAn essential metrology tool for research<br \/>\nand industry!<\/span><\/strong><\/h2>\n<p><strong><span style=\"color: #ffffff;\">With the Acoustic Test tank, the IEMN has a platform that is unique in France in an academic environment for conducting experimental studies on full-scale underwater acoustic equipment in a controlled environment.<img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-76089\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/titre_bassin_acoutique_def_en3.png\" alt=\"\" width=\"500\" height=\"85\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/titre_bassin_acoutique_def_en3.png 1000w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/titre_bassin_acoutique_def_en3-300x51.png 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/titre_bassin_acoutique_def_en3-768x131.png 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/titre_bassin_acoutique_def_en3-18x3.png 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/titre_bassin_acoutique_def_en3-705x121.png 705w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/span><\/strong><\/p>\n<p><strong><span style=\"color: #ffffff;\">This tank thus enables fundamental and applied research to be conducted in response to current challenges in defence (sonar systems, ship discretion and stealth), oceanography (seabed imaging), and the environment (control of anthropogenic noise in the ocean) within the framework of numerous industrial partnerships.<\/span><\/strong><\/p>\n<\/div><\/section><\/div>\n<div  class='flex_column av-13lysga-5a074bfda2a6c3276cdf5fc2a070c695 av_two_fifth  avia-builder-el-2  el_after_av_one_full  el_before_av_three_fifth  first flex_column_div  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-miramps9-96ad13e9d6691e2edfc5fe757b662b73\">\n.avia-video.av-miramps9-96ad13e9d6691e2edfc5fe757b662b73{\npadding-bottom:178%;\n}\n<\/style>\n<div  class='avia-video av-miramps9-96ad13e9d6691e2edfc5fe757b662b73 avia-video-custom av-no-preview-image avia-video-load-always avia-video-html5'  itemprop=\"video\" itemtype=\"https:\/\/schema.org\/VideoObject\"  data-original_url='https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/bassin_acoustique_def_newsletter-1.mp4'><video class='avia_video'    preload=\"auto\"  controls id='player_76006_111866154_1922923804'><source src='https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/12\/bassin_acoustique_def_newsletter-1.mp4' type='video\/mp4' \/><\/video><\/div><\/div>\n<div  class='flex_column av-kkkkui-9251528f4b758d3ca25472d683d0c5b0 av_three_fifth  avia-builder-el-4  el_after_av_two_fifth  avia-builder-el-last  flex_column_div  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mir4cexx-ba8e98f86ac8cc224031137a68e512d2\">\n#top .av_textblock_section.av-mir4cexx-ba8e98f86ac8cc224031137a68e512d2 .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-mir4cexx-ba8e98f86ac8cc224031137a68e512d2'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"font-weight: 400;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-cf906129a7fadf478b99caf0d974684b\">\n.av_font_icon.av-mqde7m-1-9-cf906129a7fadf478b99caf0d974684b{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-cf906129a7fadf478b99caf0d974684b .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-cf906129a7fadf478b99caf0d974684b 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='\ue89a' data-av_iconfont='entypo-fontello' ><\/span><\/span><strong>The IEMN Acoustic Test Tank enables a variety of experimental studies related to the marine field to be carried out as part of research work, student projects, and industrial services.<br \/>\n<\/strong>Its volume of approximately 300 m3 (length 8 m, width 6 m, depth 7 m) and its location in an open academic environment make it unique in France. It was originally built in a hangar in 1985 for underwater acoustics applications in the 2\u2013200 kHz frequency range, thanks to funding from the Region and the DRET. It was integrated into the ISEN building during its extension in 1998 and then rebuilt in 2022 in a new JUNIA building.<\/p>\n<p style=\"font-weight: 400;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-5-1abde174ab0891341074c10d2bfede06\">\n.av_font_icon.av-mqde7m-1-9-5-1abde174ab0891341074c10d2bfede06{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-5-1abde174ab0891341074c10d2bfede06 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-5-1abde174ab0891341074c10d2bfede06 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='\ue89a' data-av_iconfont='entypo-fontello' ><\/span><\/span>Acoustic measurements in water are essential for studying devices, structures, and materials intended for underwater use. They provide a <strong>good assessment of performance before moving on to measurements in \u201creal\u201d<\/strong> conditions (in lakes or at sea), which are much more logistically and financially burdensome. However, they require precise identification of the influence of the finite dimensions of the tank on the measurement in order to enable reliable extrapolation. As such, the acoustic test tank is an <strong>important metrology tool for research and industry.<\/strong><\/p>\n<p style=\"font-weight: 400;\"><strong><span style=\"color: #77b392;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-4-081d0b8b1ec9b2dd28aa4833ee9ce19d\">\n.av_font_icon.av-mqde7m-1-9-4-081d0b8b1ec9b2dd28aa4833ee9ce19d{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-4-081d0b8b1ec9b2dd28aa4833ee9ce19d .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-4-081d0b8b1ec9b2dd28aa4833ee9ce19d 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='\ue89a' data-av_iconfont='entypo-fontello' ><\/span><\/span>The research conducted in the Acoustic Test Tank mainly concerns three areas of application:<\/span><\/strong><\/p>\n<p><strong><span style=\"color: #77b392;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-3-1ef9520132980395147cbad98706decc\">\n.av_font_icon.av-mqde7m-1-9-3-1ef9520132980395147cbad98706decc{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-3-1ef9520132980395147cbad98706decc .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-3-1ef9520132980395147cbad98706decc 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='\ue88d' data-av_iconfont='entypo-fontello' ><\/span><\/span>Defence<\/span> : sonar, acoustic discretion and stealth, <\/strong><\/p>\n<p><strong><span style=\"color: #77b392;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-2-f4b71394fae0528d864f1c020f2d25d8\">\n.av_font_icon.av-mqde7m-1-9-2-f4b71394fae0528d864f1c020f2d25d8{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-2-f4b71394fae0528d864f1c020f2d25d8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-2-f4b71394fae0528d864f1c020f2d25d8 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='\ue88d' data-av_iconfont='entypo-fontello' ><\/span><\/span>Oceanography<\/span> : seabed imaging,<\/strong><\/p>\n<p><strong><span style=\"color: #77b392;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-1-f2c0d1bacff7d4313f97124fff64ab72\">\n.av_font_icon.av-mqde7m-1-9-1-f2c0d1bacff7d4313f97124fff64ab72{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-1-f2c0d1bacff7d4313f97124fff64ab72 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-1-f2c0d1bacff7d4313f97124fff64ab72 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='\ue88d' data-av_iconfont='entypo-fontello' ><\/span><\/span>and the Environnement<\/span> : <\/strong><strong>control of anthropogenic noise in the ocean in connection with UN Sustainable Development Goal (SDG) 14.<\/strong><\/p>\n<p style=\"font-weight: 400;\">They are often carried out within the framework of <strong>industrial partnerships<\/strong> (Naval Group, Thales, Exail, Soacsy, Greenov, etc.) and supported by the ANR ASTRID program. The main challenge at present is that of low frequencies (frequencies below 1 kHz, wavelengths from a few meters to a few tens of meters), which require <strong>new concepts<\/strong> to produce effective sub-wavelength-thick screens or coatings and compact broadband sources. The issues addressed concern both the <strong>experimental study of physical<\/strong> problems (acoustic panels based on metamaterials, vibration control of plates by nonlinear energy wells, low-frequency and broadband transducers for seabed imaging) and the development of <strong>new characterization methods<\/strong> (3-point and 5-point methods for determining the acoustic fields transmitted and reflected by metapanels).<\/p>\n<h5 style=\"font-weight: 400;\"><strong><span style=\"color: #77b392;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-1-1-33df651dffc9e40dc15fc39c95b0f75b\">\n.av_font_icon.av-mqde7m-1-9-1-1-33df651dffc9e40dc15fc39c95b0f75b{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-1-1-33df651dffc9e40dc15fc39c95b0f75b .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-1-1-33df651dffc9e40dc15fc39c95b0f75b 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='\ue842' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><span style=\"color: #77b392;\">Several measurement benches in the acoustic test tank are used regularly as part of services provided to companies:<\/span> <\/strong><\/h5>\n<p style=\"font-weight: 400;\"><strong><span style=\"color: #77b392;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-1-2-f465e922e76c61fed9e3df2d899d1f7b\">\n.av_font_icon.av-mqde7m-1-9-1-2-f465e922e76c61fed9e3df2d899d1f7b{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-1-2-f465e922e76c61fed9e3df2d899d1f7b .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-1-2-f465e922e76c61fed9e3df2d899d1f7b 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='\ue88d' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/strong> Pressure levels measurements via hydrophones\/reference transmitters to evaluate acoustic source (TVR transmitting voltage response, SPL sound pressure level, directivity) and hydrophones specifications (FFVS free-field voltage sensitivity, directivity), measurement of the reflection and transmission coefficients of acoustic panels (insertion methods, 3-point and 5-point methods).<\/p>\n<h5 style=\"font-weight: 400;\"><strong><span style=\"color: #77b392;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-9-1-1-1-1-59297616fa869a75d41fda77f4b00fef\">\n.av_font_icon.av-mqde7m-1-9-1-1-1-1-59297616fa869a75d41fda77f4b00fef{\ncolor:#77b392;\nborder-color:#77b392;\n}\n.av_font_icon.av-mqde7m-1-9-1-1-1-1-59297616fa869a75d41fda77f4b00fef .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-9-1-1-1-1-59297616fa869a75d41fda77f4b00fef 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='\ue826' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/strong>These measurement methods are described in detail in<strong><span style=\"color: #77b392;\"> <a style=\"color: #77b392;\" href=\"https:\/\/exact6.sciencesconf.org\/data\/exact6_conf_monique_pouille.pdf\" target=\"_blank\" rel=\"noopener\">[Pouille 2024]<\/a>.<\/span><\/strong><\/h5>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-76006","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/76006","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=76006"}],"version-history":[{"count":14,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/76006\/revisions"}],"predecessor-version":[{"id":76650,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/76006\/revisions\/76650"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=76006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=76006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=76006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}