feather/icons/volume.svg

<svg
  xmlns="http://www.w3.org/2000/svg"
  width="24"
  height="24"
  viewBox="0 0 24 24"
  fill="none"
  stroke="currentColor"
  stroke-width="2"
  stroke-linecap="round"
  stroke-linejoin="round"
>
  <polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5" />
</svg>