1.0Imperalumhttps://www.imperalum.com/en/Nuno Pedrohttps://www.imperalum.com/en/author/gigaprimeadmin/rich600338<blockquote class="wp-embedded-content" data-secret="RrNeP6cAYE"><a href="https://www.imperalum.com/en/solutions/acoustic-insulation/consideracoes-gerais/">General Considerations</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.imperalum.com/en/solutions/acoustic-insulation/consideracoes-gerais/embed/#?secret=RrNeP6cAYE" width="600" height="338" title="“General Considerations” — Imperalum" data-secret="RrNeP6cAYE" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.imperalum.com/cms/wp-includes/js/wp-embed.min.js </script> General Acoustics Concepts When the established sound field is diffuse (a field with the same sound energy density at each point in space), the dissipation of sound energy in an enclosed space takes place for incidence conditions on the boundary elements in all directions. This energy dissipation is translated by the sound absorption coefficient α […]https://imperalum.com/cms/wp-content/uploads/2014/08/considera%C3%A7%C3%B5es_11.gif