Physics Problem Help? How much energy is delivered to your eardrum each second when someone whispers (20dB) a?
Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the eardrum is about 8.4 mm in humans.
How much energy is delivered to your eardrum each second when someone whispers (20dB) a secret in your ear?
So I tried this a couple times but kept getting the wrong answer.
I found I through I = I_0 * 10^(L_I / 10) = 1E-10
Then I put that into P = IA = I * 4 * pi * r^2 = 2.22E-14 W but that’s not the correct answer.
What am I doing wrong?
Honestly……. this stuff looks like witch craft in my eyes.
adamthomas03 | Nov 04, 2009
Add comment November 5th, 2009
Edgar Watson