Question

When a sound source approaches you, the pitch you hear is

A. higher than when the source is stationary.
B. first higher and then lower than the pitch of the source when stationary.
C. the same as when the source is stationary.
D. lower than when the source is stationary.

Answer 1

Answer: The correct answer is Option A.

Step-by-step explanation:

Pitch of the wave is defined as the measure of frequency of the wave.

Higher the frequency, higher will be the pitch and vice-versa.

Frequency is defined as the number of oscillations happening in 1 second. As, the sound approaches near you, the frequency of the wave increases and therefore, increases the pitch of the sound wave.

Hence, the correct answer is Option A.

Answer 2

When a sound source is moving and approaching you, the pitch that
you hear is higher than when the source is stationary.