Things that vibrate send out sound waves. Characteristics of sound include, pitch, loudness, and quality.

The pitch of a sound is how high or low a sound is.
Pitch is basically your ears’ response to the frequency of a sound.

Frequency

Frequency is determined by how fast the sound producing objects vibrates.

Frequency is the number of waves that move past a point in one second. In the diagram, if the sound waves move from the speaker, through the air, and into the ear in one second, what is the frequency of the sound?

Frequency = 6 waves per second

Pitch

Pitch is how high or low a sound is.

Pitch depends on the frequency of a sound.

Loudness

The loudness of a wave depends on its energy. The greater the energy the louder the sound. The greater the energy the greater the amplitude (height) of the sound wave.

In the diagram:

Wave A and B have the same frequency, but A is louder.
Waves A and B have the same pitch.

Waves C and D have the same frequency, but C is louder.
Waves C and D have the same pitch.

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