public/chartcss/_sonification.css

#sonic{width:20px;height:20px;text-align:center;background-color:#b3b2b2;color:#fff;font-size:11px;border-radius:50%;margin-top:0px;display:inline-block;margin-right:10px;background-image:url("https://interactive.guim.co.uk/embed/aus/graphics/sonification/audio.svg");background-size:90%;background-position:center;z-index:99;cursor:pointer;border-color:none;border-style:none;border:none;cursor:pointer}