Distance between points where the wave begins to repeat itself

when a wave is bent by traveling from one medium to another

The substance that a wave is passing through

A wave that propagates sound, requires a medium

a form of electromagnetic radiation that doesn't require a medium to pass through

Spread out areas or areas of decreased pressure on a sound wave are known as a ---

The speed of sound depends on these two things:

Sonar and echolocation use ----- to detect objects under water.

Sound waves that are beyond the range of human ear are known as ----

Sound waves travel the fastest through ---

The Tacoma Narrows Bridge, musical instruments, and crystal stemware are examples of -----