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

Question

Quizplus · Accepted Answer

The given statement matches the effect of the Doppler effect. According to the Doppler effect, the frequency of sound is higher in front of the source and lower behind it. Therefore, option A is the best choice. Dolby is a type of sound compression technology and it does not have any relation to the frequency change of a moving sound source.

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