What is the power intercepted by the microphone

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Reference no: EM13342936

1) A source emits sound waves isotropically. The intensity of the waves at a distance of 2.50 m from the source is 1.91×10-4 W/m2. What is the power of the sound at the source?

2) A certain sound source is increased in sound level by 30.0 dB. By what multiple is its intensity increased?

3) A point source emits 30.0 W of sound isotropically. A small microphone intercepts the sound at a distance of 200 m from the source. What is the sound level at the microphone?

4) If the microphone in problem 3 has an area of 0.750 cm2. What is the power intercepted by the microphone?

Reference no: EM13342936

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