What is true of the amplitude of a sound wave?
A) It is inversely proportional to the sound wave's wavelength.
B) It corresponds to the psychological dimension of loudness.
C) It corresponds to the psychological dimension of pitch.
D) It is measured in units called hertz.

Question

Quizplus · Accepted Answer

The amplitude of a sound wave corresponds to the psychological dimension of loudness, which is the perceived magnitude or intensity of a sound. This is in contrast to the wavelength, which is a physical property of the wave and is inversely proportional to its frequency (not amplitude) according to the wave equation. Pitch is also a psychological dimension of sound, but it corresponds to the frequency of the wave (not amplitude). Hertz (Hz) is a unit of frequency (cycles per second), not amplitude.

What Is True of the Amplitude of a Sound Wave