{"id":5007,"date":"2020-12-01T12:50:37","date_gmt":"2020-12-01T10:50:37","guid":{"rendered":"https:\/\/www.loudspeakers.audio\/?post_type=ufaq&#038;p=5007"},"modified":"2021-06-03T21:56:42","modified_gmt":"2021-06-03T19:56:42","slug":"test-signal-explained","status":"publish","type":"ufaq","link":"https:\/\/www.loudspeakers.audio\/fr\/faqs\/test-signal-explained\/","title":{"rendered":"Comprendre le signal de test"},"content":{"rendered":"<style>.ewd-ufaq-post-margin-symbol { color: #4055a9 !important; }.ewd-ufaq-post-margin-symbol { border-color: #53037d !important; }.ewd-ufaq-faq-display-style-block.ewd-ufaq-post-active, .ewd-ufaq-faq-display-style-block.ewd-ufaq-post-active a,.ewd-ufaq-faq-display-style-block:hover, .ewd-ufaq-faq-display-style-block:hover a, .ewd-ufaq-faq-display-style-block:hover h5 { background-color: #617ffe !important; }.ewd-ufaq-faq-display-style-border_block.ewd-ufaq-post-active, .ewd-ufaq-faq-display-style-border_block:hover, .ewd-ufaq-faq-display-style-border_block:hover h5 { background-color: #617ffe !important; }.ewd-ufaq-faq-display-style-border_block .ewd-ufaq-faq-body { border-color: #617ffe !important; }.ewd-ufaq-faq-display-style-border_block .comment-reply-title, .ewd-ufaq-faq-display-style-border_block:hover .comment-reply-title { background-color: transparent !important; }.ewd-ufaq-faq-display-style-block:hover .ewd-ufaq-post-margin-symbol, .ewd-ufaq-category-post-margin-symbol, .ewd-ufaq-faq-display-style-block:hover h5 { color: #4055a9 !important; }.ewd-ufaq-faq-display-style-border_block:hover .ewd-ufaq-post-margin-symbol, .ewd-ufaq-category-post-margin-symbol, .ewd-ufaq-faq-display-style-border_block:hover h5 { color: #4055a9 !important; }.ewd-ufaq-faq-header-title a { color: #7b2c2c !important; }div.ewd-ufaq-faq-title h5 { color: #4055a9 !important; }div.ewd-ufaq-faq-post p { color: #000000 !important; }div.ewd-ufaq-faq-category-title h3 { color: #2b1010 !important; }div.ewd-ufaq-faq-categories, div.ewd-ufaq-faq-tags { color: #9b4c4c !important; }div.ewd-ufaq-faq-categories, div.ewd-ufaq-faq-tags { margin: 30 !important; }<\/style><div  class=\"ewd-ufaq-faq-list ewd-ufaq-page-type-infinite_scroll ewd-ufaq-category-tabs-\" id='ewd-ufaq-faq-list'>\n\n\t<input type='hidden' name='show_on_load' value='' id='ewd-ufaq-show-on-load' \/>\n<input type='hidden' name='include_category' value='' id='ewd-ufaq-include-category' \/>\n<input type='hidden' name='exclude_category' value='' id='ewd-ufaq-exclude-category' \/>\n<input type='hidden' name='orderby' value='set_order' id='ewd-ufaq-orderby' \/>\n<input type='hidden' name='order' value='asc' id='ewd-ufaq-order' \/>\n<input type='hidden' name='post_count' value='-1' id='ewd-ufaq-post-count' \/>\n<input type='hidden' name='current_url' value='\/fr\/wp-json\/wp\/v2\/ufaq\/5007' id='ewd-ufaq-current-url' \/>\n\t\n\t\n\t<div class='ewd-ufaq-faqs'>\n\n\t\t<div  class=\"ewd-ufaq-faq-div ewd-ufaq-faq-column-count-two ewd-ufaq-faq-responsive-columns-1 ewd-ufaq-faq-display-style-minimalist ewd-ufaq-can-be-toggled\" id='ewd-ufaq-post-5007-ibaBGKDhrn' data-post_id='5007'>\n\n\t\t\n\t<div class='ewd-ufaq-faq-title ewd-ufaq-faq-toggle'>\n\t\n\t<a class='ewd-ufaq-post-margin'  href='#' role=\"button\">\n\n\t\t<div class='ewd-ufaq-post-margin-symbol ewd-ufaq-square'>\n\t\t\t<span >B<\/span>\n\t\t<\/div>\n\n\t\t<div class='ewd-ufaq-faq-title-text'>\n\n\t\t\t<h5>\n\t\t\t\tComprendre le signal de test\t\t\t<\/h5>\n\n\t\t<\/div>\n\n\t\t<div class='ewd-ufaq-clear'><\/div>\n\n\t<\/a>\n\t\n<\/div>\n\t\n\t<div class='ewd-ufaq-faq-body' >\n\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t<div class='ewd-ufaq-post-margin ewd-ufaq-faq-post'>\n\t<p>La s\u00e9quence de test comprend diff\u00e9rents signaux pour obtenir l'ensemble des courbes pr\u00e9sent\u00e9es :<\/p>\n<ul>\n<li>une s\u00e9quence de d\u00e9marrage avec signal de synchro et fr\u00e9quence d'identification<\/li>\n<li>signal Log Sine sweep (cf farina) pour r\u00e9ponse impulsionnelle, spectrogrammes, ondelettes, distortion,...<\/li>\n<li>des bongs courts pour analyse temporelle<\/li>\n<li>bruit rose pour mesure MMM par canal puis les deux canaux ensemble (mono). Ce bruit rose est conforme \u00e0 la recommandation <a href=\"https:\/\/ieeexplore.ieee.org\/document\/7395532\" target=\"_blank\" rel=\"noopener\">SMPTE standard ST-2095-1<\/a>, voir aussi : <a href=\"https:\/\/www.ohl.to\/archives\/395\" target=\"_blank\" rel=\"noopener\">https:\/\/www.ohl.to\/archives\/395<\/a><\/li>\n<li>si le niveau est r\u00e9gl\u00e9 de fa\u00e7on \u00e0 ce que la voix soit celle d'une personne parlant dans la pi\u00e8ce, le niveau des sweep sera \u00e0 environ 75dBC, le bruit rose par canal entre 75 et 80dBC et celui du bruit rose simultan\u00e9 G+D entre 80 et 85dBC.<\/li>\n<li>\u00e0 la fin, il y a un autre signal de synchro utilis\u00e9 pour compenser un \u00e9ventuel d\u00e9calage entres les horloges du lecteur et de l'enregistreur<\/li>\n<\/ul>\n<\/div>\n\t\t\n\t\t\t<div class='ewd-ufaq-permalink'>\n\t\n\t<a href=\"https:\/\/www.loudspeakers.audio\/fr\/faqs\/test-signal-explained\/single-faq\/test-signal-explained\/\">\n\t\t\n\t\tPermalink\t\t\t\n\t<\/a>\n\n<\/div>\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t<div class='ewd-ufaq-faq-custom-fields'>\n\n\t\n<\/div>\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t<\/div>\n\n<\/div>\n\t<\/div>\n\n\t\n<\/div>","protected":false},"excerpt":{"rendered":"<p>B Test signal explained The test track is a sequence of various signals that are choosen to permit all analysis seen on the graphs : start sequence with synchronisation signal and identification frequency log sine sweeps (Farina signal) for impulse responses, spectrograms, wavelets, distortion,&#8230; short bursts for timing analysis pink &hellip;<\/p>","protected":false},"author":1,"featured_media":0,"template":"","ufaq-category":[187],"ufaq-tag":[],"class_list":["post-5007","ufaq","type-ufaq","status-publish","hentry","ufaq-category-1-about-this-website"],"_links":{"self":[{"href":"https:\/\/www.loudspeakers.audio\/fr\/wp-json\/wp\/v2\/ufaq\/5007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.loudspeakers.audio\/fr\/wp-json\/wp\/v2\/ufaq"}],"about":[{"href":"https:\/\/www.loudspeakers.audio\/fr\/wp-json\/wp\/v2\/types\/ufaq"}],"author":[{"embeddable":true,"href":"https:\/\/www.loudspeakers.audio\/fr\/wp-json\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/www.loudspeakers.audio\/fr\/wp-json\/wp\/v2\/media?parent=5007"}],"wp:term":[{"taxonomy":"ufaq-category","embeddable":true,"href":"https:\/\/www.loudspeakers.audio\/fr\/wp-json\/wp\/v2\/ufaq-category?post=5007"},{"taxonomy":"ufaq-tag","embeddable":true,"href":"https:\/\/www.loudspeakers.audio\/fr\/wp-json\/wp\/v2\/ufaq-tag?post=5007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}