An outside loudspeaker (considered a small source) emits sound waves with a powe

Question

An outside loudspeaker (considered a small source) emits sound waves with a power output of 85 W. (a) Find the intensity 12.5 m from the source. Your response differs from the correct answer by more than 10%. Double check your calculations. W/m2 (b) Find the intensity level in decibels at that distance. Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. dB (c) At what distance would you experience the sound at the threshold of pain, 120 dB? m

Explanation / Answer

a) 0.0433 w/m^2 b)106.3649 db c)2.6007

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