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A sound source emits an acoustic power of 0.5 W uniformly in all Spatial directions. What...

A sound source emits an acoustic power of 0.5 W uniformly in all
Spatial directions. What is the sound pressure level of this sound wave in 50 m
Distance generated when she
a) hanging freely in the room,
b) on a reverberant floor,
c) on a reverberant floor immediately in front of a reflective wall
stands?

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