1.0Imperalumhttps://www.imperalum.com/en/Nuno Pedrohttps://www.imperalum.com/en/author/gigaprimeadmin/rich600338<blockquote class="wp-embedded-content" data-secret="2SywJO8PfT"><a href="https://www.imperalum.com/en/solutions/acoustic-insulation/transmissao-marginal/">Marginal Transmission</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.imperalum.com/en/solutions/acoustic-insulation/transmissao-marginal/embed/#?secret=2SywJO8PfT" width="600" height="338" title="“Marginal Transmission” — Imperalum" data-secret="2SywJO8PfT" 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 The values obtained with the procedures presented, when referring to real performance verification tests, take into account all the sound energy transmission processes that may occur between the spaces in presence (direct and marginal). Marginal transmission is only accounted for, in the indices described, when on-site testing is performed. This transmission usually […]https://imperalum.com/cms/wp-content/uploads/2014/08/Transmiss%C3%A3o-Marginal.gif