{"id":27172,"date":"2022-06-23T11:47:11","date_gmt":"2022-06-23T10:47:11","guid":{"rendered":"https:\/\/www.imperalum.com\/nivel-de-pressao-e-de-potencia-sonora\/"},"modified":"2022-10-24T15:20:33","modified_gmt":"2022-10-24T14:20:33","slug":"nivel-de-pressao-e-de-potencia-sonora","status":"publish","type":"page","link":"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/nivel-de-pressao-e-de-potencia-sonora\/","title":{"rendered":"Pressure and Sound Power Level"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"27172\" class=\"elementor elementor-27172 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\" data-settings=\"{&quot;background_background&quot;:&quot;classic&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-top-column elementor-element elementor-element-30fc7334\" data-id=\"30fc7334\" 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\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-83b9275\" data-id=\"83b9275\" 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-3b18d164 elementor-align-right elementor-widget elementor-widget-breadcrumbs\" data-id=\"3b18d164\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/www.imperalum.com\/en\/\">Home<\/a><\/span><\/span><\/p>\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b8daabb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b8daabb\" data-element_type=\"section\" data-e-type=\"section\">\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-33 elementor-top-column elementor-element elementor-element-a50f4cb\" data-id=\"a50f4cb\" 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-d76278d elementor-widget elementor-widget-heading\" 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\">General Acoustics Concepts <\/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 class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<nav aria-label=\"Menu\" class=\"elementor-nav-menu--main elementor-nav-menu__container elementor-nav-menu--layout-vertical e--pointer-background e--animation-fade\">\n\t\t\t\t<ul id=\"menu-1-2d2f739\" class=\"elementor-nav-menu sm-vertical\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27320\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/manual-de-acustica\/\" class=\"elementor-item\">Acoustics Manual<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27321\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/o-som-no-ar\/\" class=\"elementor-item\">The Sound in the Air<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27322\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/velocidade-de-propagacao-do-som\/\" class=\"elementor-item\">Speed of Sound Propagation<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27323\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/comprimento-de-onda\/\" class=\"elementor-item\">Wavelength<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27324\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/nivel-de-pressao-e-de-potencia-sonora\/\" class=\"elementor-item\">Pressure and Sound Power Level<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27325\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/nivel-sonoro\/\" class=\"elementor-item\">Sound Level<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27326\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/tempo-de-reverberacao\/\" class=\"elementor-item\">Reverberation Time<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27327\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/bandas-de-frequencia\/\" class=\"elementor-item\">Frequency Bands<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27328\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/sons-aereos-e-de-percussao\/\" class=\"elementor-item\">Air and Percussion Sounds<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27527\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/normas\/\" class=\"elementor-item\">Standards<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27528\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/indice-de-isol-a-sons-aereos\/\" class=\"elementor-item\">Airborne Sound Insulation Index<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27529\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/indice-de-isol-a-sons-de-percussao\/\" class=\"elementor-item\">Percussion Sound Insulation Index<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27530\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/reducao-sonora-de-revestimentos-de-piso-ou-sistemas-de-pavimento-flutuante\/\" class=\"elementor-item\">Sound Reduction from Floor Coverings or Floating Floor Systems<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27531\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/transmissao-marginal\/\" class=\"elementor-item\">Marginal Transmission<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27532\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/consideracoes-gerais\/\" class=\"elementor-item\">General Considerations<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27533\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/solucoes-para-correccao-acustica-de-espacos\/\" class=\"elementor-item\">Solutions for Acoustic Correction of Spaces<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27534\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/materiais-porosos\/\" class=\"elementor-item\">Porous Materials<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27329\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/sistemas-ressonantes\/\" class=\"elementor-item\">Resonant Systems<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28292\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/solucoes-construtivas-imperalum\/\" class=\"elementor-item\">Imperalum&#8217;s Building Solutions<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t<div class=\"elementor-menu-toggle\" role=\"button\" tabindex=\"0\" aria-label=\"Menu Toggle\" aria-expanded=\"false\">\n\t\t\t<i aria-hidden=\"true\" role=\"presentation\" class=\"elementor-menu-toggle__icon--open eicon-menu-bar\"><\/i><i aria-hidden=\"true\" role=\"presentation\" class=\"elementor-menu-toggle__icon--close eicon-close\"><\/i>\t\t<\/div>\n\t\t\t\t\t<nav class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-2d2f739\" class=\"elementor-nav-menu sm-vertical\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27320\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/manual-de-acustica\/\" class=\"elementor-item\" tabindex=\"-1\">Acoustics Manual<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27321\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/o-som-no-ar\/\" class=\"elementor-item\" tabindex=\"-1\">The Sound in the Air<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27322\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/velocidade-de-propagacao-do-som\/\" class=\"elementor-item\" tabindex=\"-1\">Speed of Sound Propagation<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27323\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/comprimento-de-onda\/\" class=\"elementor-item\" tabindex=\"-1\">Wavelength<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27324\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/nivel-de-pressao-e-de-potencia-sonora\/\" class=\"elementor-item\" tabindex=\"-1\">Pressure and Sound Power Level<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27325\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/nivel-sonoro\/\" class=\"elementor-item\" tabindex=\"-1\">Sound Level<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27326\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/tempo-de-reverberacao\/\" class=\"elementor-item\" tabindex=\"-1\">Reverberation Time<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27327\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/bandas-de-frequencia\/\" class=\"elementor-item\" tabindex=\"-1\">Frequency Bands<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27328\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/sons-aereos-e-de-percussao\/\" class=\"elementor-item\" tabindex=\"-1\">Air and Percussion Sounds<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27527\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/normas\/\" class=\"elementor-item\" tabindex=\"-1\">Standards<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27528\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/indice-de-isol-a-sons-aereos\/\" class=\"elementor-item\" tabindex=\"-1\">Airborne Sound Insulation Index<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27529\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/indice-de-isol-a-sons-de-percussao\/\" class=\"elementor-item\" tabindex=\"-1\">Percussion Sound Insulation Index<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27530\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/reducao-sonora-de-revestimentos-de-piso-ou-sistemas-de-pavimento-flutuante\/\" class=\"elementor-item\" tabindex=\"-1\">Sound Reduction from Floor Coverings or Floating Floor Systems<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27531\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/transmissao-marginal\/\" class=\"elementor-item\" tabindex=\"-1\">Marginal Transmission<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27532\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/consideracoes-gerais\/\" class=\"elementor-item\" tabindex=\"-1\">General Considerations<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27533\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/solucoes-para-correccao-acustica-de-espacos\/\" class=\"elementor-item\" tabindex=\"-1\">Solutions for Acoustic Correction of Spaces<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27534\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/materiais-porosos\/\" class=\"elementor-item\" tabindex=\"-1\">Porous Materials<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-27329\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/sistemas-ressonantes\/\" class=\"elementor-item\" tabindex=\"-1\">Resonant Systems<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-28292\"><a href=\"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/solucoes-construtivas-imperalum\/\" class=\"elementor-item\" tabindex=\"-1\">Imperalum&#8217;s Building Solutions<\/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\">\n<div id=\"post-3701\" class=\"single-post\">\n<div class=\"row\">\n<div class=\"col-md-12\">\n<div class=\"content\">\n<div class=\"post_content\">\n<div class=\"col-md-12\">\n<p>The values of quantities in the acoustical domain, namely sound pressure and power, are expressed in terms of their levels, considered in relation to reference values. The sound pressure level, expressed in decibels, is given by the following expression:<\/p>\n<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>\n<p>In this equation, the square of the effective value of the sound pressure, for a specific time interval t, defined by (<strong>t <sub>2<\/sub> \u2013 t <sub>1<\/sub><\/strong> ), is given by:<\/p>\n<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>\n<p>The sound pressure level is usually determined and presented by frequency bands with a width of one octave or one-third octave, identified respectively by their nominal center frequency. As far as the sound power level of a specific source or equipment is concerned, it is expressed in <strong>dB(A)<\/strong> and is given by the following expression:<\/p>\n<p><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>\n<p>Where W represents the value of the sound power of the source or equipment.&nbsp; The reference values of the previous expressions are, respectively: for sound pressure &#8211; <strong>P <sub>ref.<\/sub> = 2 x 10<sup> -5<\/sup><\/strong> pascals; and for sound power &#8211; <strong>W <sub>ref.<\/sub> = 10<sup>-12<\/sup><\/strong>&nbsp; watts.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.imperalum.com\/?solucoes=nivel-de-pressao-e-de-potencia-sonora\" alt=\"\"><\/p><\/div>\n<div class=\"clearfix\"><\/div>\n<hr>\n<div class=\"downloadfiles\">\n<div class=\"row\">\n<div class=\"col-md-12\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"clearfix\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/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>General Acoustics Concepts The values of quantities in the acoustical domain, namely sound pressure and power, are expressed in terms of their levels, considered in relation to reference values. The sound pressure level, expressed in decibels, is given by the following expression: In this equation, the square of the effective value of the sound pressure, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":27567,"menu_order":228,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-27172","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>Pressure and Sound Power Level - 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\/en\/solutions\/acoustic-insulation\/nivel-de-pressao-e-de-potencia-sonora\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pressure and Sound Power Level - Imperalum\" \/>\n<meta property=\"og:description\" content=\"General Acoustics Concepts The values of quantities in the acoustical domain, namely sound pressure and power, are expressed in terms of their levels, considered in relation to reference values. 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