Question

Which form does sound travel in

Answer 1

Echoing would be your answer.

To echo sound vibrations bounce of walls and send back the same thing you said.

Hope this helps

Answer 2

Sound vibrations travel in a wave pattern, and we call these vibrations sound waves. Sound waves move by vibrating objects and these objects vibrate other surrounding objects, carrying the sound along. ... Sound can move through the air, water, or solids, as long as there are particles to bounce off of.

Basically, your sound is in sound waves, which volume is measured by Hertz. They vibrate to carry sound.