Frequency and loudness help in perceiving distance:
A) only if the sound source is located far away.
B) only if the sound source is approaching.
C) only if the sound source is receding.
D) if the sound source is approaching or receding.

Question

Quizplus · Accepted Answer

Frequency and loudness can help in perceiving distance because of the Doppler effect, which causes changes in frequency and amplitude of sound waves depending on whether the source is moving towards or away from the observer.

Frequency and Loudness Help in Perceiving Distance