system-uicons/src/images/icons/audio_wave.svg

<svg height="21" viewBox="0 0 21 21" width="21" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"><path d="m6.5 8.5v4"/><path d="m8.5 6.5v9"/><path d="m10.5 9.5v2"/><path d="m12.5 7.5v6.814"/><path d="m14.5 4.5v12"/></g></svg>