2points
the characteristic of a sound wave that we hear as pitch is the:
o
a. spectrum
o
b. velocity.
o
c. amplitude.
o
d. frequency
sr

The Correct Answer is D

Explanation:

Strength is contained in decibels and is observed as sound amplification. Thus, the sound is proportional to the amplitude of the sound wave. The repetition of a sound wave is recognized as pitch. People can recognize pitches within the acoustic spectrum of 22 to 20,000 Hz, but we can't recognize ultrasound or infrasound.