Sound_Waves_1
image/svg+xml
Openclipart
Sound_Waves_2
2013-10-15T13:19:11
This is a sound wave or somee other travelling frequency whether it be light or sound.
https://openclipart.org/detail/184973/sound_waves_2-by-devyncjohnson-184973
DevynCJohnson
noise
signal
sound
vibration
wave
wifi
wireless