A loudspeaker is emitting sound into the air at power of 15 mW. What is the magnitude of the sound pressure level at distance of 10 m from the loudspeaker? Assume the loudspeaker is emitting sound to a half of the space (into a solid angle of (2π srad).

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Given P 15 mW r d 10 m We know that sound pressure level is given as Lp 20 log p p 0 p S... View the full answer