1.0IGCSE Computer Sciencehttps://learnlearn.uk/igcsecslearnlearnadminhttps://learnlearn.uk/igcsecs/author/learnlearnadmin/rich600338<blockquote class="wp-embedded-content" data-secret="MWCobLFDSX"><a href="https://learnlearn.uk/igcsecs/microphone/">Microphone</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://learnlearn.uk/igcsecs/microphone/embed/#?secret=MWCobLFDSX" width="600" height="338" title="“Microphone” — IGCSE Computer Science" data-secret="MWCobLFDSX" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,d){"use strict";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),l=0;l<n.length;l++)n[l].style.display="none";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=d.createElement("a"),a=d.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> Starter https://play.kahoot.it/#/k/fc7843cb-b752-45be-9a17-9d3a107fcefb What is sound? Sound is vibrations that travel though a medium (usually air) from one point to another, caused by rapid changes pressure within that medium. When we shout, our vocal cords vibrate rapidly, causing the pressure in the air surrounding them to increase and decrease, producing a pressure(aka sound) wave. This wave… Read More »http://learnlearn.uk/binary/wp-content/uploads/sites/11/2017/01/high-amplitude-300x149.png