PNG ICO ICNS MORE
Network & communications
Pixel
16x16 Free Application Icons
music, off, sound
Black
16x16
Computer & hardware
256.8 Pixels
speaker
PNG MORE
Family & home
IconBeast Lite
on, speaker
30x30
speaker, Electric
Mixed
IconSweets 2
Key, volume, speaker
40x40
speaker, volume, sound
UI
Fugue Icons
speaker, volume, low
volume, speaker
Lynx Black
high, speaker, volume