{"id":1397,"date":"2023-07-18T12:09:29","date_gmt":"2023-07-18T16:09:29","guid":{"rendered":"https:\/\/centreauditifabitibi.com\/?p=1397"},"modified":"2023-09-19T14:05:49","modified_gmt":"2023-09-19T18:05:49","slug":"compression-sonore-et-audition","status":"publish","type":"post","link":"https:\/\/centreauditifabitibi.com\/en\/compression-sonore-et-audition\/","title":{"rendered":"Impact de la musique compress\u00e9e sur l&#8217;ou\u00efe"},"content":{"rendered":"<p>On le dit et redit sans cesse\u00a0: la musique forte, comme les sons forts en g\u00e9n\u00e9ral, peut affecter l\u2019audition de mani\u00e8re irr\u00e9versible. Plusieurs campagnes de pr\u00e9vention de la perte auditive vont en ce sens. Plus r\u00e9cemment, ce que l\u2019on a d\u00e9couvert par des \u00e9tudes et dont on se m\u00e9fiait moins, c\u2019est que la musique compress\u00e9e s\u2019av\u00e8re tout aussi dommageable que les d\u00e9cibels \u00e9lev\u00e9s.<\/p>\n<h2>Qu\u2019est-ce que de la musique compress\u00e9e\u2009?<\/h2>\n<p>Il existe 2\u00a0types de compression. La plus connue est celle qui <strong>permet de supprimer une partie des informations d\u2019un fichier afin d\u2019en r\u00e9duire la taille<\/strong> (exemple\u00a0: MP3). Ce type de compression pratique a plut\u00f4t tendance \u00e0 r\u00e9duire la qualit\u00e9 d\u2019\u00e9coute de la pi\u00e8ce musicale.<\/p>\n<p>Le second type de compression, dont il est question dans cet article, est celui r\u00e9sultant du <strong>traitement du signal qui se fait au plan \u00e9lectronique apr\u00e8s la transformation du signal acoustique en signal \u00e9lectrique<\/strong>.<\/p>\n<blockquote><p>\u00c0 lire aussi : <a href=\"https:\/\/centreauditifabitibi.com\/lon-ma-diagnostique-une-perte-auditive-et-puis-apres\/\" target=\"_blank\" rel=\"noopener\">L\u2019on m\u2019a diagnostiqu\u00e9 une perte auditive. Et puis apr\u00e8s ?<\/a><\/p><\/blockquote>\n<p>Il permet de r\u00e9duire la variation d\u2019amplitude d\u2019un signal \u00e9lectrique tout en pr\u00e9servant l\u2019int\u00e9gralit\u00e9 des informations musicales. Cette compression agit sur la dynamique du morceau en augmentant le niveau des sons de faible intensit\u00e9 ou en diminuant ceux d\u2019intensit\u00e9 sup\u00e9rieure. Autrement dit, il est question de r\u00e9duire les \u00e9carts entre les sons forts et les sons faibles.<\/p>\n<p>\u00c0 premi\u00e8re vue, cela peut sembler \u00eatre une bonne chose, puisque le fait d\u2019aplatir la courbe de variations \u00e9vite les pics sonores qui nous agressent ou causent de la distorsion dans les syst\u00e8mes de son. Cette compression est d\u2019ailleurs utilis\u00e9e dans les appareils auditifs pour \u00e9viter de suramplifier des sons qui pourraient \u00eatre inconfortables.<\/p>\n<p>En musique, elle permet aux musiciens de nous faire entendre les subtilit\u00e9s de chaque instrument composant la pi\u00e8ce, du plus doux au plus fort, et ce, sans avoir \u00e0 augmenter le volume; bien pratique dans les environnements bruyants!<\/p>\n<h2>La compression sonore : d\u00e9sormais omnipr\u00e9sente<\/h2>\n<p>Donc, jusqu\u2019ici, la compression semble \u00eatre un outil favorable pour notre ou\u00efe.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-1401 alignright\" src=\"https:\/\/centreauditifabitibi.com\/wp-content\/uploads\/2023\/07\/compression-sonore.jpg\" alt=\"\" width=\"206\" height=\"201\" \/><\/p>\n<p>L\u00e0 o\u00f9 \u00e7a se g\u00e2te, c\u2019est que depuis son arriv\u00e9e dans les ann\u00e9es 60, la compression est devenue omnipr\u00e9sente : dans la musique, au cin\u00e9ma, dans les syst\u00e8mes de cin\u00e9ma maison, dans les publicit\u00e9s, etc. Elle est partout, tout le temps. On parle m\u00eame de surcompression du fait de l&#8217;absence de micro-pauses dans les pi\u00e8ces musicales ou sonores.<\/p>\n<p>L\u2019une des cons\u00e9quences de l&#8217;omnipr\u00e9sence de cette surcompression est une fatigue du r\u00e9flexe stap\u00e9dien qui ne retrouve plus aucun r\u00e9pit.<\/p>\n<p><strong>Qu\u2019est-ce que le r\u00e9flexe stap\u00e9dien\u2009?<\/strong><\/p>\n<p>Le r\u00e9flexe stap\u00e9dien est une r\u00e9action rapide de raidissement de la mobilit\u00e9 de l\u2019\u00e9trier, d\u00fb \u00e0 la contraction du muscle de l\u2019\u00e9trier en r\u00e9ponse \u00e0 un stimulus sonore intense. <a href=\"#_ftn1\" name=\"_ftnref1\"><strong>[1]<\/strong><\/a><\/p>\n<p>Le r\u00e9flexe stap\u00e9dien est le grand protecteur de notre cochl\u00e9e et de nos cellules cili\u00e9es. S\u2019il se fatigue et ne r\u00e9pond plus bien, notre syst\u00e8me auditif est expos\u00e9 \u00e0 de grands dangers. Il peut en r\u00e9sulter une perte auditive ainsi que de l\u2019acouph\u00e8ne.<\/p>\n<div class=\"video-shortcode\"><iframe title=\"le r\u00e9flexe stap\u00e9dien\" width=\"1138\" height=\"640\" src=\"https:\/\/www.youtube.com\/embed\/PDZd5yv-fSo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/div>\n<p>Un autre ph\u00e9nom\u00e8ne li\u00e9 \u00e0 la compression sonore est aussi celui de la paresse auditive rendant l\u2019oreille moins susceptible d\u2019entendre les sons de faible intensit\u00e9.<\/p>\n<h2>Est-il possible d&#8217;\u00e9viter la compression?<\/h2>\n<p>Puisque le consommateur de musique ou de cin\u00e9ma n\u2019a pas le pouvoir de contr\u00f4ler la compression qui lui est impos\u00e9e. Difficile d&#8217;\u00e9chapper \u00e0 la musique compress\u00e9e!<\/p>\n<p>Il est donc judicieux, maintenant que l\u2019on en connait les risques, de non seulement faire attention aux niveaux en d\u00e9cibels auxquels on s\u2019expose, mais \u00e9galement de porter attention \u00e0 la dur\u00e9e d\u2019exposition.<\/p>\n<p>Une alternative serait de choisir de la musique dite \u00ab\u2009haute fid\u00e9lit\u00e9\u2009\u00bb (exemple\u00a0: SACD, DSD ou des musiques Hi-Res), mais cela ne garantit toutefois pas qu\u2019il n\u2019y ait aucune compression. L\u2019utilisation d\u2019un casque d\u2019\u00e9coute \u00e0 r\u00e9duction active du bruit peut aussi favoriser l\u2019\u00e9coute \u00e0 bas niveaux.<\/p>\n<p>Finalement, la bonne nouvelle est que des \u00e9tudes se poursuivent dans le domaine afin d\u2019\u00e9tablir des recommandations et \u00e9ventuellement \u00e9tablir une norme afin de prot\u00e9ger le public.<\/p>\n<hr \/>\n<p><a href=\"#_ftnref1\" name=\"_ftn1\">[1]<\/a> Guide de poche des affections de l\u2019oreille, M\u00e9decine-Sciences, Flammarion<\/p>\n","protected":false},"excerpt":{"rendered":"<p>On le dit et redit sans cesse\u00a0: la musique forte, comme les  [&#8230;]<\/p>\n","protected":false},"author":5,"featured_media":1405,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-1397","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Impact de la musique compress\u00e9e sur l&#039;ou\u00efe - Centre Auditif Abitibi<\/title>\n<meta name=\"description\" content=\"Saviez-vous que la compression sonore peut avoir un impact sur l&#039;audition? 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