Sound and light

vibrations that travel through air or another medium and can be heard when they reach the ears.

Pressure waves that move back and forth vibrations of particles of the medium through which the sound moves.

Regions of high air pressures

Region of low air pressures

A distance that a disturbance travels along a medium in one complete wave cycles

the measurement of one wave crest to the next adjacent wave crest.  These are energy that is carried away from the source.

repeating patterns of compression and rarefactions measured as the distance from one compression to the next adjacent compression or the distance from one rarefaction to the next adjacent rarefaction.

• repeating patterns of high and low pressure
• (compression and rarefaction)

The arrival of a compression

the arrival of a rarefaction

at a peak on the graph is high

at a low peak on the graph

the pressure that the air would have

They are Longitudinal waves with compression and rarefactions

Frequency of a wave refers to how often the particles of the medium vibrate when a wave passes through the medium

a number of complete back and forth vibrations of a particle of the medium per unit of time

between 20 Hz and 20000 Hz

any sound with a frequency below audible range of hearing (less than 20Hz)

any sound above audible range of hearing (20000Hz)

the sensation of a frequency of sound

a high frequency sound wave

a low frequency sound wave

certain sound waves that when played on an instrument, plays simultaneously and will be pleasant.