{"version":"1.0","provider_name":"Blog | Resources","provider_url":"https:\/\/blogs.qsc.com\/live-sound","author_name":"Christophe Anet","author_url":"https:\/\/blogs.qsc.com\/live-sound\/author\/canet\/","title":"History, Development and Applications of Column Loudspeakers - Blog | Resources","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"kRjxeQYBDC\"><a href=\"https:\/\/blogs.qsc.com\/live-sound\/history-development-and-applications-of-column-loudspeakers\/\">History, Development and Applications of Column Loudspeakers<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/blogs.qsc.com\/live-sound\/history-development-and-applications-of-column-loudspeakers\/embed\/#?secret=kRjxeQYBDC\" width=\"600\" height=\"338\" title=\"&#8220;History, Development and Applications of Column Loudspeakers&#8221; &#8212; Blog | Resources\" data-secret=\"kRjxeQYBDC\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!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);\n\/\/# sourceURL=https:\/\/blogs.qsc.com\/live-sound\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"In the field of electroacoustics and sound radiation, there are two fundamental types of sound sources that each provide specific radiation patterns and sound characteristics, both of which may be desirable depending on the application. These are the point source and the line source (or column source). This article will review the basic acoustical principles &hellip; Read More","thumbnail_url":"https:\/\/blogs.qsc.com\/app\/uploads\/sites\/3\/2025\/05\/Fig-1_Spherical-Radiation.png"}