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

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Sound waves and eardrum problem

**Physics Forums | Science Articles, Homework Help, Discussion**