According to the Doppler effect,the of a sound emitted by a moving sound source is behind the sound source than in front of it.
A)loudness;higher
B)frequency;lower
C)loudness;lower

Question

Quizplus · Accepted Answer

According to the Doppler effect, when a sound source is moving, the frequency of the sound waves changes based on the relative motion of the source and the observer. If the source is moving towards the observer, the frequency increases (i.e., higher pitch). Conversely, if the source is moving away from the observer, the frequency decreases (i.e., lower pitch). Therefore, the correct answer is B, frequency, lower. Loudness is not affected by the Doppler effect.

According to the Doppler Effect,the of a Sound Emitted by a Moving