A

amplitude

the pressure put out by sound or also known as volume

C

cochlea

A liquid filled part of the ear which helps with hearing and balance

crest

The highest part of a wave

D

decibels

The unit of measuring the loudness of a sound

device

Tool or equipment

Doppler

A scientist who discovered why the pitch changes as a sound passes an observer

E

echo

The reflection of sound off of a solid such as a canyon wall

echolocation

The use of echoes to navigate

electrocardiogram

The use of sound waves to get readings about the health of a heart

energy

Activity or power

extracorporeal shock waves

The use of sound waves to shatter kidney stones inside the kidney

F

frequency

The distance between two sound waves also known as pitch

H

humidity

Amount of water vapor in the air

M

matter

Anything that has mass and takes up space

molecules

smallest form of matter consisting of one or more atoms

N

navigate

To move around

P

pitch

The high or low of a sound

properties

The qualities of matter - size, color, temperature, etc.

S

sonar

The use of sound waves to identify underground or underwater objects

T

trough

The lowest part of a wave

U

ultrasonic cleaners

The use of inaudible sound waves to break up plaque on the teeth

ultrasound

That part of sound in which the frequency is too high for the human ear

V

vacuum

An space filled with nothing, not even air

vibrates

To move rhythmically in a pattern