Alert sound buttons all have the same icon
The icons aren't useful here:
In the designs, each icon was unique, and was supposed to communicate something useful about the sound before you click it (#264 is relevant).
If we are unable to update the sounds (again, #264), we need to decide whether the icons are useful for the current alert selection. If they're not useful, it might be best to rethink the alert selection UI. If they can be useful, we can provide new icons to replace the existing one.