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10 Nov 2019
A microphone in the ocean is sensitive to sounds emitted byporpoises. To produce a usable signal, sound waves striking themicrophone must have an intensity of 10 dB. If porpoises emit soundwaves with a power of 0.010 W, how far can a porpoise be from themicrophone and still be heard? Disregard absorption of sound wavesby the water.
A microphone in the ocean is sensitive to sounds emitted byporpoises. To produce a usable signal, sound waves striking themicrophone must have an intensity of 10 dB. If porpoises emit soundwaves with a power of 0.010 W, how far can a porpoise be from themicrophone and still be heard? Disregard absorption of sound wavesby the water.
Keith LeannonLv2
17 Feb 2019
