Question

Two loudspeakers are in phase and both producing 458-Hz sound waves 3 meters from each other....

Two loudspeakers are in phase and both producing 458-Hz sound waves 3 meters from each other. A person initially stands 1.6 meters in front

     of one of the speakers. The person then walks directly away from this speaker.

How far will the person have walked when they

hear the combined sounds from the two speakers

reach a minimum in loudness for the third time?

  1. The power output of each speaker is 2.40 mW.

What is the sound intensity level the person

will hear when they are at the location

found in part (a)?

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