1.Consider a sound wave of frequency f generated in air by a loudspeaker. When t

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1.Consider a sound wave of frequency f generated in air by a loudspeaker. When this sound wave reaches a nearby lake, the sound wave propagates into the water, where it has the same frequency f. What is the ratio of the wavelength of the wave in the water to the wavelength in air?

2.a You are at a rock concert, and the sound intensity reaches levels as high as 100 dB. The sound pressure produces an oscillating force on your eardrum. Estimate the area of the ear drum.

My answer for part a was 50.0mm^2 and it was correct

b,Calculate the amplitude of this oscillating force. (Use your estimate.)

3.A person has severe hearing loss that reduces the intensity in his inner ear by 25.0 dB. To compensate, a hearing aid can amplify the sound pressure amplitude by a certain factor to bring the intensity level back to the value for a healthy ear. What amplification factor is needed for this person?

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