Question

Sound waves with frequencies higher than 20,000 Hz are referred to as subsonic waves.

User: The pitch of a sound is most closely related to the
a. frequency of vibrations.
b. distance from the sound source.
c. medium through which the sound travels.
d. intensity of the sound.

Answer 1

Sounds at frequencies higher than 20,000 Hz
are called "ultrasound" waves. "Subsonic"
are those at frequencies lower than 20 Hz.

The pitch of a sound is intimately related to
the frequency of the sound vibrations.