{"id":27311,"date":"2022-06-23T14:30:59","date_gmt":"2022-06-23T13:30:59","guid":{"rendered":"https:\/\/www.imperalum.com\/materiais-porosos\/"},"modified":"2022-10-24T16:45:04","modified_gmt":"2022-10-24T15:45:04","slug":"materiais-porosos","status":"publish","type":"page","link":"https:\/\/www.imperalum.com\/en\/solutions\/acoustic-insulation\/materiais-porosos\/","title":{"rendered":"Porous Materials"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"27311\" class=\"elementor elementor-27311 elementor-22872\" 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-2a61855 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=\"2a61855\" 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-1-2a61855\" 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-2-2a61855\" 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-5443c01 elementor-widget elementor-widget-text-editor\" data-id=\"5443c01\" 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<hr>\n<p>Porous materials are those in which the solid part that constitutes them occupies only part of their volume, the remaining part being formed by small gaps, open to the exterior and which may (or may not) communicate with each other. Sound absorption is fundamentally processed by energy dissipation due to air friction during propagation along the pores that define it, and also by viscosity and internal friction in the vibration of the material structure itself.<\/p>\n<p>The maximum efficiency in the operation of these systems is obtained by placing the material in the position where the vibration velocity of the air particles is greatest (see the following Figure), thus allowing the kinetic energy of the corresponding vibration to be reduced.<\/p>\n<p><a href=\"https:\/\/imperalum.com\/cms\/wp-content\/uploads\/2014\/08\/materiais-porosos.gif\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-1746 size-full\" src=\"https:\/\/imperalum.com\/cms\/wp-content\/uploads\/2014\/08\/materiais-porosos.gif\" alt=\"porous materials\" width=\"370\" height=\"199\"><\/a><\/p>\n<p>The speed of vibration of the particles is greater at a distance of \u00bc of the wavelength, and hence the energy dissipating capacity of the material.<\/p>\n<p>The energy dissipation processes that occur in this type of material derive much from the porosity they exhibit, and for this reason they are normally effective in acoustic corrections to be made in the high frequency domain (frequencies above 500 &#8211; 630 Hz).<\/p>\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 Porous materials are those in which the solid part that constitutes them occupies only part of their volume, the remaining part being formed by small gaps, open to the exterior and which may (or may not) communicate with each other. Sound absorption is fundamentally processed by energy dissipation due to air friction [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":27567,"menu_order":191,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-27311","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>Porous Materials - 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\/materiais-porosos\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Porous Materials - Imperalum\" \/>\n<meta property=\"og:description\" content=\"General Acoustics Concepts Porous materials are those in which the solid part that constitutes them occupies only part of their volume, the remaining part being formed by small gaps, open to the exterior and which may (or may not) communicate with each other. 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