A 50 dB sound wave strikes an eardrum whose area is 4.1 * 10-5 m2.(adsbygoogle = window.adsbygoogle || []).push({});

(a) How much energy is absorbed by the eardrum per second?

W

(b) At this rate, how long would it take your eardrum to receive a total energy of 1.0 J?

years

I have tried to solve using I=2pi^2f^2A^2pv

and got f=280 ; v=343;p=1.29;I=1*10^-12 and A =1.28e-18 its wrong though

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# Homework Help: Sound waves and eardrum problem

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