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## Homework Statement

During normal conversation, the amplitude of a pressure wave is 0.023 Pa.

(a) If the area of the eardrum is 0.56 cm2, what is the force on the eardrum?

N

(b) The mechanical advantage of the three bones in the middle ear is 1.5. If the force in part a is transmitted undiminished to the bones, what force do the bones exert on the oval window, the membrane to which the third bone is attached?

N

(c) The area of the oval window is 0.026 cm2. What is the pressure increase transmitted to the liquid in the cochlea?

Pa

## Homework Equations

I'd assume I'd be using dB=20log(P/P) But I'm not sure how to apply that to any of these equations.

## The Attempt at a Solution

Can't even figure out where to start. I'm sure with some starting advice, or at least how to solve the first part I could figure it out.