{"id":28959,"date":"2021-08-26T16:26:35","date_gmt":"2021-08-26T14:26:35","guid":{"rendered":"https:\/\/itemm.fr\/itemm\/?p=28959"},"modified":"2021-08-31T15:52:05","modified_gmt":"2021-08-31T13:52:05","slug":"inversion-de-perce-dinstruments-scannes","status":"publish","type":"post","link":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/","title":{"rendered":"Inversion de perce d\u2019instruments scann\u00e9s"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"28959\" class=\"elementor elementor-28959\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5f14bc66 elementor-section-height-min-height elementor-section-boxed elementor-section-height-default elementor-section-items-middle\" data-id=\"5f14bc66\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;,&quot;shape_divider_bottom&quot;:&quot;waves&quot;,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t<div class=\"elementor-shape elementor-shape-bottom\" aria-hidden=\"true\" data-negative=\"false\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1000 100\" preserveAspectRatio=\"none\">\n\t<path class=\"elementor-shape-fill\" d=\"M421.9,6.5c22.6-2.5,51.5,0.4,75.5,5.3c23.6,4.9,70.9,23.5,100.5,35.7c75.8,32.2,133.7,44.5,192.6,49.7\n\tc23.6,2.1,48.7,3.5,103.4-2.5c54.7-6,106.2-25.6,106.2-25.6V0H0v30.3c0,0,72,32.6,158.4,30.5c39.2-0.7,92.8-6.7,134-22.4\n\tc21.2-8.1,52.2-18.2,79.7-24.2C399.3,7.9,411.6,7.5,421.9,6.5z\"\/>\n<\/svg>\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-15630019\" data-id=\"15630019\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-173f694a elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"173f694a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Inversion de perce d\u2019instruments scann\u00e9s<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-26aaeb43 elementor-align-center elementor-widget elementor-widget-post-info\" data-id=\"26aaeb43\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"post-info.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-ede85bd elementor-inline-item\" itemprop=\"author\">\n\t\t\t\t\t\t<a href=\"https:\/\/itemm.fr\/itemm\/author\/cedric\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-author\">\n\t\t\t\t\t\t\t\t\t\tcedric.charrier\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-ef11192 elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/itemm.fr\/itemm\/2021\/08\/26\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>ao\u00fbt 26, 2021<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-e52f4f7 elementor-inline-item\" itemprop=\"about\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-tags\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-terms\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-post-info__terms-list\">\n\t\t\t\t<a href=\"https:\/\/itemm.fr\/itemm\/category\/innovation\/conservation-du-patrimoine\/\" class=\"elementor-post-info__terms-list-item\">Conservation du patrimoine<\/a>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6457fd94 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6457fd94\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-52dd313d\" data-id=\"52dd313d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1f3c53b1 elementor-widget elementor-widget-theme-post-featured-image elementor-widget-image\" data-id=\"1f3c53b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"theme-post-featured-image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-1024x538.png\" class=\"attachment-large size-large wp-image-28964\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-1024x538.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-600x315.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-300x158.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-768x404.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png 1472w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3ddab80 elementor-widget elementor-widget-spacer\" data-id=\"3ddab80\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-41d6dfd5 elementor-widget elementor-widget-theme-post-excerpt\" data-id=\"41d6dfd5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"theme-post-excerpt.default\">\n\t\t\t\t\tPour simuler le comportement acoustique d'une trompette naturelle (Num\u00e9ro d\u2019inventaire E.0925), le projet SySIMPa  s'appuie sur OPENWIND, un logiciel opensource  d\u00e9velopp\u00e9 par l'INRIA. Ce logiciel fait appel \u00e0 la m\u00e9thode des \u00e9l\u00e9ments finis pour calculer la r\u00e9ponse de l'instrument dans le domaine fr\u00e9quentiel (imp\u00e9dance) ou temporel (simulation sonore).\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e0a6382 elementor-widget elementor-widget-spacer\" data-id=\"5e0a6382\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-63ba7909 elementor-widget elementor-widget-text-editor\" data-id=\"63ba7909\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dafe67c elementor-widget elementor-widget-text-editor\" data-id=\"dafe67c\" data-element_type=\"widget\" data-settings=\"{\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><div class=\"elementor-text-editor elementor-clearfix\"><p>Pour des raisons de co\u00fbt de calcul, la g\u00e9om\u00e9trie estim\u00e9e suite au scanner par tomodensitom\u00e8tre doit \u00eatre simplifi\u00e9e. En effet, la tomographie mesure le rayon de l&#8217;instrument avec un pas de l&#8217;ordre du mm, ce qui r\u00e9sulte, pour un instrument d&#8217;environ 2 m\u00e8tres de long, en une g\u00e9om\u00e9trie d\u00e9finie par plus de mille points de mesure. Ceci est non seulement beaucoup trop lourd en terme de calcul, si l&#8217;on souhaite simuler par exemple l&#8217;imp\u00e9dance correspondante, mais ces points de mesure n&#8217;ont pas de sens d&#8217;un point de vue facture instrumentale, dont les techniques de fabrication ne peuvent pas \u00eatre aussi pr\u00e9cises et variables suivant le long de la perce de l\u2019instrument. De plus, les faibles variations sur de longs segments de l&#8217;instrument peuvent \u00eatre consid\u00e9r\u00e9es comme du bruit de mesure, d\u00fb notamment aux nombreux artefacts issus de la tomographie rayons X.<\/p>Nous proposons ici une simplification de la perce, qui va, en quelque sorte, lisser le r\u00e9sultat issu de l\u2019exploitation des donn\u00e9es du tomodensitom\u00e8tre. Nous montrons ensuite que les r\u00e9sultats obtenus sont proches de ceux avant simplification et exploitables par un fabricant pour r\u00e9aliser une copie de l\u2019instrument.<\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-0b854e7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0b854e7\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-4fd76d2\" data-id=\"4fd76d2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4846ec2 elementor-widget elementor-widget-image\" data-id=\"4846ec2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_1-1-1024x538.png\" class=\"attachment-large size-large wp-image-28966\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_1-1-1024x538.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_1-1-600x315.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_1-1-300x158.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_1-1-768x404.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_1-1.png 1472w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Simplification de la g\u00e9om\u00e9trie estim\u00e9e par tomographie. La courbe bleue (la g\u00e9om\u00e9trie originale) est d\u00e9crite par plus d'un millier de points. La courbe orange (la simplification), ne comporte qu'une dizaine de segments.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-2d63620\" data-id=\"2d63620\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-85d339d elementor-widget elementor-widget-image\" data-id=\"85d339d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-1024x538.png\" class=\"attachment-large size-large wp-image-28964\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-1024x538.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-600x315.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-300x158.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1-768x404.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png 1472w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Zoom sur la figure 1. La partie centrale est simplifi\u00e9e en un cylindre, et toutes les variations sont consid\u00e9r\u00e9es comme du bruit de mesure. En effet, la variation globale du rayon mesur\u00e9e sur ce segment est de quelques dizi\u00e8mes de millim\u00e8tre, sur une longueur de 1 m\u00e8tre. La conicit\u00e9 correspondante serait donc de l'ordre de 10-4, ce qui n'a pas de sens du point de vue du fabricant, compte tenu des tol\u00e9rances et m\u00e9thodes de fabrication.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-54ed0af elementor-widget elementor-widget-text-editor\" data-id=\"54ed0af\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La g\u00e9om\u00e9trie d&#8217;une trompette d&#8217;environ 2 m\u00e8tres de long est ainsi simplifi\u00e9e en une dizaine de segments simples. La simplification se fait en gardant \u00e0 l&#8217;esprit les techniques de facture instrumentale (tournage, pon\u00e7age, huilage) et les tol\u00e9rances de fabrication cons\u00e9cutives, et r\u00e9sulte en une g\u00e9om\u00e9trie r\u00e9aliste et utilisable dans un code d&#8217;\u00e9l\u00e9ments finis.<\/p><p>Le calcul d&#8217;imp\u00e9dance est compar\u00e9 \u00e0 des mesures exp\u00e9rimentales sur l&#8217;instrument. L&#8217;imp\u00e9dance de la trompette Besson E.0925 a \u00e9t\u00e9 mesur\u00e9e par l&#8217;\u00e9quipe de la Cit\u00e9 de la Musique, avec le capteur d&#8217;imp\u00e9dance d\u00e9velopp\u00e9 par le CTTM.<\/p><p>La mesure se fait sur une plage de fr\u00e9quence entre 20Hz et 2kHz. Dix mesures successives ont \u00e9t\u00e9 faites et \u00ab\u00a0moyenn\u00e9es\u00a0\u00bb pour obtenir l&#8217;imp\u00e9dance de r\u00e9f\u00e9rence de l&#8217;instrument.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-ba81dba elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ba81dba\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-9d2e3b4\" data-id=\"9d2e3b4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1355e6d elementor-widget elementor-widget-image\" data-id=\"1355e6d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"846\" height=\"1024\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-846x1024.png\" class=\"attachment-large size-large wp-image-28967\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-846x1024.png 846w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-600x726.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-248x300.png 248w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-768x929.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-1269x1536.png 1269w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-1693x2048.png 1693w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_3-scaled.png 1653w\" sizes=\"(max-width: 846px) 100vw, 846px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Photo montrant le dispositif exp\u00e9rimental de mesure d'imp\u00e9dance d'une trompette naturelle E.0925<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-1a93543\" data-id=\"1a93543\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8869d51 elementor-widget elementor-widget-image\" data-id=\"8869d51\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_4-1024x538.png\" class=\"attachment-large size-large wp-image-28971\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_4-1024x538.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_4-600x315.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_4-300x158.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_4-768x404.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_4.png 1533w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Moyenne des dix mesures d'imp\u00e9dance pour la trompette 0925.\n<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-d4c34c6 elementor-widget elementor-widget-text-editor\" data-id=\"d4c34c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Ces mesures exp\u00e9rimentales servent alors de r\u00e9f\u00e9rence pour optimiser la g\u00e9om\u00e9trie obtenue par tomographie. En effet, en d\u00e9finissant l&#8217;imp\u00e9dance mesur\u00e9e comme imp\u00e9dance-cible, on peut optimiser la g\u00e9om\u00e9trie estim\u00e9e par tomographie pour que l&#8217;imp\u00e9dance de celle-ci colle au mieux \u00e0 la mesure par un processus d&#8217;inversion.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-18940ce elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"18940ce\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ae5aa7e\" data-id=\"ae5aa7e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0007af7 elementor-widget elementor-widget-image\" data-id=\"0007af7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_5-1024x538.png\" class=\"attachment-large size-large wp-image-28972\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_5-1024x538.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_5-600x315.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_5-300x158.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_5-768x404.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_5.png 1533w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">L'imp\u00e9dance de la trompette E.0925, mesur\u00e9e exp\u00e9rimentalement (bleu), calcul\u00e9e \u00e0 partir de la g\u00e9om\u00e9trie simplifi\u00e9e telle que montr\u00e9e en fig.1 (orange) et calcul\u00e9e \u00e0 partir de la g\u00e9om\u00e9trie obtenue apr\u00e8s optimisation (vert).<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-5c67d70\" data-id=\"5c67d70\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9d6fac6 elementor-widget elementor-widget-image\" data-id=\"9d6fac6\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_6-1024x538.png\" class=\"attachment-large size-large wp-image-28973\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_6-1024x538.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_6-600x315.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_6-300x158.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_6-768x404.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_6.png 1533w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Zoom sur les pics 2, 3 et 4 de l'imp\u00e9dance montr\u00e9e en Fig.5. On voit comment le processus d'optimisation am\u00e9liore la concordance entre imp\u00e9dance simul\u00e9e et mesur\u00e9e exp\u00e9rimentalement.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-ef4ab2e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ef4ab2e\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-9200edd\" data-id=\"9200edd\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-25e8f68 elementor-widget elementor-widget-image\" data-id=\"25e8f68\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"538\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_7-1024x538.png\" class=\"attachment-large size-large wp-image-28974\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_7-1024x538.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_7-600x315.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_7-300x158.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_7-768x404.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_7.png 1533w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">G\u00e9om\u00e9trie initiale (estim\u00e9e par tomographie) pour la trompette Besson 0925 (bleu) et g\u00e9om\u00e9trie optimis\u00e9e (orange). La comparaison entre imp\u00e9dance simul\u00e9e et mesur\u00e9e a permis de mettre en \u00e9vidence une sous-estimation de la longueur de l'instrument par la tomographie, de l'ordre du cm.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-99face7\" data-id=\"99face7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-49ef63c elementor-widget elementor-widget-text-editor\" data-id=\"49ef63c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Ces m\u00e9thodes permettront d\u2019acc\u00e9l\u00e9rer le processus de reconstruction de perce d\u2019instruments de musique \u00e0 vent, en simplifiant les calculs tout en garantissant des r\u00e9sultats acceptables, surtout du point de vue d\u2019un fabricant d\u2019instruments de musique, en particulier, compte tenu de ses tol\u00e9rances de fabrication.<\/p><p><br \/><\/p><p>Article \u00e9crit par : Tobias VAN BAARSEL<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-42a7b1e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"42a7b1e\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-3de5e0f0\" data-id=\"3de5e0f0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5b49bef7 elementor-widget elementor-widget-heading\" data-id=\"5b49bef7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Partager cet article<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-641836ef\" data-id=\"641836ef\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9ebf483 elementor-share-buttons--view-icon elementor-share-buttons--skin-flat elementor-share-buttons--color-custom elementor-share-buttons--shape-square elementor-grid-0 elementor-widget elementor-widget-share-buttons\" data-id=\"9ebf483\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"share-buttons.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-grid\" role=\"list\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_facebook\" role=\"button\" tabindex=\"0\" aria-label=\"Partager sur facebook\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fab fa-facebook\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_linkedin\" role=\"button\" tabindex=\"0\" aria-label=\"Partager sur linkedin\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fab fa-linkedin\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_twitter\" role=\"button\" tabindex=\"0\" aria-label=\"Partager sur twitter\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fab fa-twitter\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_email\" role=\"button\" tabindex=\"0\" aria-label=\"Partager sur email\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fas fa-envelope\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-575176cf elementor-widget elementor-widget-spacer\" data-id=\"575176cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35056c87 elementor-widget elementor-widget-heading\" data-id=\"35056c87\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Plus \u00e0 d\u00e9couvrir<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-46cfa210 elementor-grid-2 elementor-posts--align-center elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-posts--thumbnail-top elementor-card-shadow-yes elementor-posts__hover-gradient elementor-widget elementor-widget-posts\" data-id=\"46cfa210\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cards_columns&quot;:&quot;2&quot;,&quot;cards_row_gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;30&quot;,&quot;sizes&quot;:[]},&quot;cards_columns_tablet&quot;:&quot;2&quot;,&quot;cards_columns_mobile&quot;:&quot;1&quot;,&quot;cards_row_gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;cards_row_gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"posts.cards\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-posts-container elementor-posts elementor-posts--skin-cards elementor-grid\" role=\"list\">\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-61863 post type-post status-publish format-standard has-post-thumbnail hentry category-actualites category-recrutement tag-formation-continue tag-recrutement category-2197 category-2085 description-off\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/itemm.fr\/itemm\/rejoignez-litemm-responsable-formation-professionelle-continue\/\" tabindex=\"-1\" ><div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"169\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-300x169.png\" class=\"attachment-medium size-medium wp-image-46271\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-300x169.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-600x337.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-1024x576.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-768x432.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-1536x864.png 1536w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found.png 1622w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__badge\">Actualit\u00e9s<\/div>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/itemm.fr\/itemm\/rejoignez-litemm-responsable-formation-professionelle-continue\/\" >\n\t\t\t\tRejoignez l&#8217;ITEMM : Responsable Formation professionelle continue H\/F-CDI\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>L&#8217;ITEMM recherche son\/sa future Responsable Formation Professionnelle Continue<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\t2 avril 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-61833 post type-post status-publish format-standard has-post-thumbnail hentry category-actualites category-recrutement tag-emploi category-2197 category-2085 description-off\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/itemm.fr\/itemm\/litemm-responsable-pole-innovation-materiaux-instruments-de-musique\/\" tabindex=\"-1\" ><div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"169\" src=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-300x169.png\" class=\"attachment-medium size-medium wp-image-46271\" alt=\"\" srcset=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-300x169.png 300w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-600x337.png 600w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-1024x576.png 1024w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-768x432.png 768w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found-1536x864.png 1536w, https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2022\/02\/pablita-perfect-candidates-cv-found.png 1622w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__badge\">Actualit\u00e9s<\/div>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/itemm.fr\/itemm\/litemm-responsable-pole-innovation-materiaux-instruments-de-musique\/\" >\n\t\t\t\tRejoignez l\u2019ITEMM : Responsable du P\u00f4le Innovation (H\/F) #SoundOfScience\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>\u00c0 la crois\u00e9e de la recherche scientifique et de la facture instrumentale, vous pilotez les projets qui dessinent la musique de demain. Votre mission ? Allier expertise technique (mat\u00e9riaux, bois, acoustique) et d\u00e9veloppement strat\u00e9gique pour faire rayonner l&#8217;innovation au sein de notre institut.<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\t19 mars 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Pour simuler le comportement acoustique d&#8217;une trompette naturelle (Num\u00e9ro d\u2019inventaire E.0925), le projet SySIMPa  s&#8217;appuie sur OPENWIND, un logiciel opensource  d\u00e9velopp\u00e9 par l&#8217;INRIA. Ce logiciel fait appel \u00e0 la m\u00e9thode des \u00e9l\u00e9ments finis pour calculer la r\u00e9ponse de l&#8217;instrument dans le domaine fr\u00e9quentiel (imp\u00e9dance) ou temporel (simulation sonore).<\/p>\n","protected":false},"author":3004,"featured_media":28964,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2176],"tags":[371],"class_list":["post-28959","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conservation-du-patrimoine","tag-trompette","category-2197","category-2085","description-off"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Inversion de perce d\u2019instruments scann\u00e9s | Itemm -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inversion de perce d\u2019instruments scann\u00e9s | Itemm -\" \/>\n<meta property=\"og:description\" content=\"Pour simuler le comportement acoustique d&#039;une trompette naturelle (Num\u00e9ro d\u2019inventaire E.0925), le projet SySIMPa s&#039;appuie sur OPENWIND, un logiciel opensource d\u00e9velopp\u00e9 par l&#039;INRIA. Ce logiciel fait appel \u00e0 la m\u00e9thode des \u00e9l\u00e9ments finis pour calculer la r\u00e9ponse de l&#039;instrument dans le domaine fr\u00e9quentiel (imp\u00e9dance) ou temporel (simulation sonore).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/\" \/>\n<meta property=\"og:site_name\" content=\"Itemm -\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/itemm.lemans\" \/>\n<meta property=\"article:published_time\" content=\"2021-08-26T14:26:35+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-08-31T13:52:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1472\" \/>\n\t<meta property=\"og:image:height\" content=\"774\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"cedric.charrier\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/\"},\"author\":{\"name\":\"cedric.charrier\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#\\\/schema\\\/person\\\/37d1ada7958a6232148f9ef96178ccd3\"},\"headline\":\"Inversion de perce d\u2019instruments scann\u00e9s\",\"datePublished\":\"2021-08-26T14:26:35+00:00\",\"dateModified\":\"2021-08-31T13:52:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/\"},\"wordCount\":789,\"publisher\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/fig_2-1.png\",\"keywords\":[\"trompette\"],\"articleSection\":[\"Conservation du patrimoine\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/\",\"url\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/\",\"name\":\"Inversion de perce d\u2019instruments scann\u00e9s | Itemm -\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/fig_2-1.png\",\"datePublished\":\"2021-08-26T14:26:35+00:00\",\"dateModified\":\"2021-08-31T13:52:05+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/#primaryimage\",\"url\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/fig_2-1.png\",\"contentUrl\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/fig_2-1.png\",\"width\":1472,\"height\":774,\"caption\":\"Zoom sur la figure 1. La partie centrale est simplifi\u00e9e en un cylindre, et toutes les variations sont consid\u00e9r\u00e9es comme du bruit de mesure. En effet, la variation globale du rayon mesur\u00e9e sur ce segment est de quelques dizi\u00e8mes de millim\u00e8tre, sur une longueur de 1 m\u00e8tre. La conicit\u00e9 correspondante serait donc de l'ordre de 10-4, ce qui n'a pas de sens du point de vue du fabricant, compte tenu des tol\u00e9rances et m\u00e9thodes de fabrication.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/inversion-de-perce-dinstruments-scannes\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Inversion de perce d\u2019instruments scann\u00e9s\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#website\",\"url\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/\",\"name\":\"Itemm\",\"description\":\"Institut technologique europ\u00e9en des m\u00e9tiers de la musique au Mans (72)\",\"publisher\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#organization\",\"name\":\"ITEMM\",\"alternateName\":\"ITEMM\",\"url\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/uploads\\\/2021\\\/12\\\/logo-itemm-piano-on.png\",\"contentUrl\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/uploads\\\/2021\\\/12\\\/logo-itemm-piano-on.png\",\"width\":446,\"height\":294,\"caption\":\"ITEMM\"},\"image\":{\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/itemm.lemans\",\"https:\\\/\\\/www.instagram.com\\\/itemmlemans\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/itemm\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/#\\\/schema\\\/person\\\/37d1ada7958a6232148f9ef96178ccd3\",\"name\":\"cedric.charrier\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/litespeed\\\/avatar\\\/6b2a3f567f020e8b4afbfd33154a4be6.jpg?ver=1775045923\",\"url\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/litespeed\\\/avatar\\\/6b2a3f567f020e8b4afbfd33154a4be6.jpg?ver=1775045923\",\"contentUrl\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/wp-content\\\/litespeed\\\/avatar\\\/6b2a3f567f020e8b4afbfd33154a4be6.jpg?ver=1775045923\",\"caption\":\"cedric.charrier\"},\"url\":\"https:\\\/\\\/itemm.fr\\\/itemm\\\/author\\\/cedric\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Inversion de perce d\u2019instruments scann\u00e9s | Itemm -","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/","og_locale":"fr_FR","og_type":"article","og_title":"Inversion de perce d\u2019instruments scann\u00e9s | Itemm -","og_description":"Pour simuler le comportement acoustique d'une trompette naturelle (Num\u00e9ro d\u2019inventaire E.0925), le projet SySIMPa s'appuie sur OPENWIND, un logiciel opensource d\u00e9velopp\u00e9 par l'INRIA. Ce logiciel fait appel \u00e0 la m\u00e9thode des \u00e9l\u00e9ments finis pour calculer la r\u00e9ponse de l'instrument dans le domaine fr\u00e9quentiel (imp\u00e9dance) ou temporel (simulation sonore).","og_url":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/","og_site_name":"Itemm -","article_publisher":"https:\/\/www.facebook.com\/itemm.lemans","article_published_time":"2021-08-26T14:26:35+00:00","article_modified_time":"2021-08-31T13:52:05+00:00","og_image":[{"width":1472,"height":774,"url":"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png","type":"image\/png"}],"author":"cedric.charrier","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/#article","isPartOf":{"@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/"},"author":{"name":"cedric.charrier","@id":"https:\/\/itemm.fr\/itemm\/#\/schema\/person\/37d1ada7958a6232148f9ef96178ccd3"},"headline":"Inversion de perce d\u2019instruments scann\u00e9s","datePublished":"2021-08-26T14:26:35+00:00","dateModified":"2021-08-31T13:52:05+00:00","mainEntityOfPage":{"@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/"},"wordCount":789,"publisher":{"@id":"https:\/\/itemm.fr\/itemm\/#organization"},"image":{"@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/#primaryimage"},"thumbnailUrl":"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png","keywords":["trompette"],"articleSection":["Conservation du patrimoine"],"inLanguage":"fr-FR"},{"@type":"WebPage","@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/","url":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/","name":"Inversion de perce d\u2019instruments scann\u00e9s | Itemm -","isPartOf":{"@id":"https:\/\/itemm.fr\/itemm\/#website"},"primaryImageOfPage":{"@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/#primaryimage"},"image":{"@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/#primaryimage"},"thumbnailUrl":"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png","datePublished":"2021-08-26T14:26:35+00:00","dateModified":"2021-08-31T13:52:05+00:00","breadcrumb":{"@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/#primaryimage","url":"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png","contentUrl":"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/08\/fig_2-1.png","width":1472,"height":774,"caption":"Zoom sur la figure 1. La partie centrale est simplifi\u00e9e en un cylindre, et toutes les variations sont consid\u00e9r\u00e9es comme du bruit de mesure. En effet, la variation globale du rayon mesur\u00e9e sur ce segment est de quelques dizi\u00e8mes de millim\u00e8tre, sur une longueur de 1 m\u00e8tre. La conicit\u00e9 correspondante serait donc de l'ordre de 10-4, ce qui n'a pas de sens du point de vue du fabricant, compte tenu des tol\u00e9rances et m\u00e9thodes de fabrication."},{"@type":"BreadcrumbList","@id":"https:\/\/itemm.fr\/itemm\/inversion-de-perce-dinstruments-scannes\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/itemm.fr\/itemm\/"},{"@type":"ListItem","position":2,"name":"Inversion de perce d\u2019instruments scann\u00e9s"}]},{"@type":"WebSite","@id":"https:\/\/itemm.fr\/itemm\/#website","url":"https:\/\/itemm.fr\/itemm\/","name":"Itemm","description":"Institut technologique europ\u00e9en des m\u00e9tiers de la musique au Mans (72)","publisher":{"@id":"https:\/\/itemm.fr\/itemm\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/itemm.fr\/itemm\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Organization","@id":"https:\/\/itemm.fr\/itemm\/#organization","name":"ITEMM","alternateName":"ITEMM","url":"https:\/\/itemm.fr\/itemm\/","logo":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/itemm.fr\/itemm\/#\/schema\/logo\/image\/","url":"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/12\/logo-itemm-piano-on.png","contentUrl":"https:\/\/itemm.fr\/itemm\/wp-content\/uploads\/2021\/12\/logo-itemm-piano-on.png","width":446,"height":294,"caption":"ITEMM"},"image":{"@id":"https:\/\/itemm.fr\/itemm\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/itemm.lemans","https:\/\/www.instagram.com\/itemmlemans\/","https:\/\/www.linkedin.com\/in\/itemm\/"]},{"@type":"Person","@id":"https:\/\/itemm.fr\/itemm\/#\/schema\/person\/37d1ada7958a6232148f9ef96178ccd3","name":"cedric.charrier","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/itemm.fr\/itemm\/wp-content\/litespeed\/avatar\/6b2a3f567f020e8b4afbfd33154a4be6.jpg?ver=1775045923","url":"https:\/\/itemm.fr\/itemm\/wp-content\/litespeed\/avatar\/6b2a3f567f020e8b4afbfd33154a4be6.jpg?ver=1775045923","contentUrl":"https:\/\/itemm.fr\/itemm\/wp-content\/litespeed\/avatar\/6b2a3f567f020e8b4afbfd33154a4be6.jpg?ver=1775045923","caption":"cedric.charrier"},"url":"https:\/\/itemm.fr\/itemm\/author\/cedric\/"}]}},"_links":{"self":[{"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/posts\/28959","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/users\/3004"}],"replies":[{"embeddable":true,"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/comments?post=28959"}],"version-history":[{"count":0,"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/posts\/28959\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/media\/28964"}],"wp:attachment":[{"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/media?parent=28959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/categories?post=28959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itemm.fr\/itemm\/wp-json\/wp\/v2\/tags?post=28959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}