Physical Science Final Review Unit 2

Front

A reflected sound wave is known as a/an ___________.

Back

echo

Front

______ is sound with frequencies too low for human hearing.

Back

Subsonic

Front

The use of underwater sound waves to detect objects is known as __________.

Back

Sonar

Front

________ contains the cochlea which vibrates and sends auditory nerve impulses to the brain.

Back

inner ear

Front

Part of the ear that has three bones that amplify a sound wave is the __________.

Back

middle ear

Front

The unit of frequency is __________.

Back

Hertz (Hz)

Front

The range of frequencies that humans can hear is approximately __________ to __________ Hz.

Back

20 to 20,000 Hz

Front

The phenomenon where sound waves bend around obstacles is known as __________.

Back

diffraction

Front

The measure of how loud a sound is perceived is called __________.

Back

loudness

Front

The __________ is the part of the ear that converts sound vibrations into nerve impulses.

Back

cochlea