{"id":27177,"date":"2022-06-23T11:47:25","date_gmt":"2022-06-23T10:47:25","guid":{"rendered":"https:\/\/www.imperalum.com\/niveau-de-pression-et-de-puissance-acoustique\/"},"modified":"2022-06-23T11:49:19","modified_gmt":"2022-06-23T10:49:19","slug":"niveau-de-pression-et-de-puissance-acoustique","status":"publish","type":"page","link":"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/niveau-de-pression-et-de-puissance-acoustique\/","title":{"rendered":"Niveau de Pression et de Puissance Acoustique"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"27177\" class=\"elementor elementor-27177 elementor-22827\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-277876ed elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"277876ed\" data-element_type=\"section\" data-e-type=\"section\" 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data-id=\"d76278d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conceitos gerais de ac\u00fastica <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d2f739 elementor-nav-menu__align-justify elementor-nav-menu--dropdown-tablet elementor-nav-menu__text-align-aside elementor-nav-menu--toggle elementor-nav-menu--burger elementor-widget elementor-widget-global elementor-global-25283 elementor-widget-nav-menu\" data-id=\"2d2f739\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;layout&quot;:&quot;vertical&quot;,&quot;submenu_icon&quot;:{&quot;value&quot;:&quot;fas fa-caret-down&quot;,&quot;library&quot;:&quot;fa-solid&quot;},&quot;toggle&quot;:&quot;burger&quot;}\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t<div 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href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/vitesse-de-propagation-du-son\/\" class=\"elementor-item\">Vitesse de Propagation du Son<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27333\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/longueur-donde\/\" class=\"elementor-item\">Longueur d\u2019Onde<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27334\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/niveau-de-pression-et-de-puissance-acoustique\/\" class=\"elementor-item\">Niveau de Pression et de Puissance Acoustique<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27335\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/niveau-acoustique\/\" class=\"elementor-item\">Niveau acoustique<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27336\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/temps-de-reverberation\/\" class=\"elementor-item\">Temps de R\u00e9verb\u00e9ration<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27337\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/bandes-de-frequence\/\" class=\"elementor-item\">Bandes de Fr\u00e9quence<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27338\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/bruits-aeriens-et-dimpact\/\" class=\"elementor-item\">Bruits A\u00e9riens et d\u2019impact<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27535\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/normes\/\" class=\"elementor-item\">Normes<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27536\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/indice-disolement-aux-bruits-aeriens\/\" class=\"elementor-item\">Indice d\u2019Isolement aux bruits a\u00e9riens<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27537\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/indice-disolement-aux-bruits-dimpact\/\" class=\"elementor-item\">Indice d\u2019Isolement aux bruits d\u2019impact<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27538\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/affaiblissement-acoustique-de-revetements-de-sol-ou-systemes-de-plancher-flottant\/\" class=\"elementor-item\">Affaiblissement Acoustique de Rev\u00eatements de Sol ou Syst\u00e8mes de Plancher Flottant<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27539\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/transmission-laterale\/\" class=\"elementor-item\">Transmission Lat\u00e9rale<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27540\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/considerations-generales\/\" class=\"elementor-item\">Consid\u00e9rations G\u00e9n\u00e9rales<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27541\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/solutions-pour-la-correction-acoustique-despaces\/\" class=\"elementor-item\">Solutions pour la correction acoustique d\u2019espaces<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27542\"><a 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href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/vitesse-de-propagation-du-son\/\" class=\"elementor-item\" tabindex=\"-1\">Vitesse de Propagation du Son<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27333\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/longueur-donde\/\" class=\"elementor-item\" tabindex=\"-1\">Longueur d\u2019Onde<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27334\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/niveau-de-pression-et-de-puissance-acoustique\/\" class=\"elementor-item\" tabindex=\"-1\">Niveau de Pression et de Puissance Acoustique<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27335\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/niveau-acoustique\/\" class=\"elementor-item\" tabindex=\"-1\">Niveau acoustique<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27336\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/temps-de-reverberation\/\" class=\"elementor-item\" tabindex=\"-1\">Temps de R\u00e9verb\u00e9ration<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27337\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/bandes-de-frequence\/\" class=\"elementor-item\" tabindex=\"-1\">Bandes de Fr\u00e9quence<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27338\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/bruits-aeriens-et-dimpact\/\" class=\"elementor-item\" tabindex=\"-1\">Bruits A\u00e9riens et d\u2019impact<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page 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href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/affaiblissement-acoustique-de-revetements-de-sol-ou-systemes-de-plancher-flottant\/\" class=\"elementor-item\" tabindex=\"-1\">Affaiblissement Acoustique de Rev\u00eatements de Sol ou Syst\u00e8mes de Plancher Flottant<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27539\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/transmission-laterale\/\" class=\"elementor-item\" tabindex=\"-1\">Transmission Lat\u00e9rale<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27540\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/considerations-generales\/\" class=\"elementor-item\" tabindex=\"-1\">Consid\u00e9rations G\u00e9n\u00e9rales<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27541\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/solutions-pour-la-correction-acoustique-despaces\/\" class=\"elementor-item\" tabindex=\"-1\">Solutions pour la correction acoustique d\u2019espaces<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27542\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/materiaux-poreux\/\" class=\"elementor-item\" tabindex=\"-1\">Mat\u00e9riaux Poreux<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27339\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/systemes-resonants\/\" class=\"elementor-item\" tabindex=\"-1\">Syst\u00e8mes R\u00e9sonants<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28293\"><a href=\"https:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/solucoes-construtivas-imperalum\/\" class=\"elementor-item\" tabindex=\"-1\">Solu\u00e7\u00f5es Construtivas Imperalum<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\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<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-c9f0490\" data-id=\"c9f0490\" 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-b38c5b4 elementor-widget elementor-widget-text-editor\" data-id=\"b38c5b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div id=\"N\u00edvel de Press\u00e3o e de Pot\u00eancia Sonora\"><div id=\"post-3701\" class=\"single-post\"><div class=\"row\"><div class=\"col-md-12\"><div class=\"content\"><div class=\"post_content\"><div class=\"col-md-12\"><p>Les valeurs de grandeurs relatives \u00e0 l\u2019acoustique, notamment la pression et la puissance acoustique, s\u2019expriment par rapport \u00e0 leurs niveaux, consid\u00e9r\u00e9s par rapport aux valeurs de r\u00e9f\u00e9rence. Le niveau de pression acoustique, qui s\u2019exprime en d\u00e9cibels, est donn\u00e9 gr\u00e2ce \u00e0 la formule suivante:<\/p><p><a href=\"https:\/\/imperalum.com\/wp-content\/uploads\/2014\/08\/niveis-pressao_1.gif\"><img decoding=\"async\" class=\"wp-image-1798 size-full aligncenter\" src=\"https:\/\/imperalum.com\/cms\/wp-content\/uploads\/2014\/08\/niveis-pressao_1.gif\" alt=\"niveis pressao_1\" width=\"162\" height=\"70\" \/><\/a><\/p><p>Pour cette \u00e9quation, le carr\u00e9 de la valeur efficace de la pression acoustique, pour un intervalle de temps t, d\u00e9fini par (t 2 \u2013 t 1 ), est donn\u00e9 par:<\/p><p><a href=\"https:\/\/imperalum.com\/cms\/wp-content\/uploads\/2014\/08\/niveis-pressao_2.gif\"><img decoding=\"async\" class=\"size-full wp-image-1799 aligncenter\" src=\"https:\/\/imperalum.com\/cms\/wp-content\/uploads\/2014\/08\/niveis-pressao_2.gif\" alt=\"niveis pressao_2\" width=\"229\" height=\"80\" \/><\/a><\/p><p>Le niveau de pression acoustique est normalement d\u00e9termin\u00e9 et pr\u00e9sent\u00e9 par bandes de fr\u00e9quences d\u2019une largeur d\u2019une octave ou d\u2019un tiers d\u2019octave, identifi\u00e9es respectivement par leur fr\u00e9quence centrale nominale. En ce qui concerne le niveau de puissance acoustique d\u2019une source particuli\u00e8re ou d\u2019un \u00e9quipement, celui-ci s\u2019exprime en\u00a0<strong>dB(A)<\/strong>\u00a0et est donn\u00e9 gr\u00e2ce \u00e0 la formule suivante:<a href=\"https:\/\/imperalum.com\/cms\/wp-content\/uploads\/2014\/08\/niveis-pressao_3.gif\"><img decoding=\"async\" class=\"size-full wp-image-1800 aligncenter\" src=\"https:\/\/imperalum.com\/cms\/wp-content\/uploads\/2014\/08\/niveis-pressao_3.gif\" alt=\"niveis pressao_3\" width=\"160\" height=\"55\" \/><\/a><\/p><p>O\u00f9 W repr\u00e9sente la valeur de la puissance acoustique de la source ou de l\u2019\u00e9quipement.<br \/>Les valeurs de r\u00e9f\u00e9rences cit\u00e9es sont, respectivement:<br \/>pour la pression acoustique \u2013\u00a0\u00a0<strong>P ref. = 2 x 10 -5<\/strong>\u00a0pascals; et pour la puissance acoustique \u2013\u00a0<strong>W ref. = 10-12\u00a0<\/strong>\u00a0watts.<\/p><p><img decoding=\"async\" src=\"http:\/\/dev.imperalum.com\/fr\/?solucoes=nivel-de-pressao-e-de-potencia-sonora\" alt=\"\" \/><\/p><\/div><div class=\"clearfix\">\u00a0<\/div><hr \/><div class=\"downloadfiles\"><div class=\"row\"><div class=\"col-md-12\">\u00a0<\/div><\/div><\/div><\/div><div class=\"clearfix\">\u00a0<\/div><\/div><\/div><\/div><\/div><\/div>\t\t\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>Conceitos gerais de ac\u00fastica Les valeurs de grandeurs relatives \u00e0 l\u2019acoustique, notamment la pression et la puissance acoustique, s\u2019expriment par rapport \u00e0 leurs niveaux, consid\u00e9r\u00e9s par rapport aux valeurs de r\u00e9f\u00e9rence. Le niveau de pression acoustique, qui s\u2019exprime en d\u00e9cibels, est donn\u00e9 gr\u00e2ce \u00e0 la formule suivante: Pour cette \u00e9quation, le carr\u00e9 de la valeur [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":27559,"menu_order":228,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-27177","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Niveau de Pression et de Puissance Acoustique - Imperalum<\/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:\/\/www.imperalum.com\/fr\/solutions\/solutions-disolation-acoustique\/niveau-de-pression-et-de-puissance-acoustique\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Niveau de Pression et de Puissance Acoustique - Imperalum\" \/>\n<meta property=\"og:description\" content=\"Conceitos gerais de ac\u00fastica Les valeurs de grandeurs relatives \u00e0 l\u2019acoustique, notamment la pression et la puissance acoustique, s\u2019expriment par rapport \u00e0 leurs niveaux, consid\u00e9r\u00e9s par rapport aux valeurs de r\u00e9f\u00e9rence. 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