Question

A sound wave of 2MHz frequency travels 14m before bouncing off a surface and returning to the source. Given the ambient temperature is 30°C

Determine

a) The time it takes for the wave to travel from the source, reflect off the surface, and return to the source (round trip time),

b) The wavelength of the sound wave,

c) The percentage remaining of the sound wave given an attenuation coefficient of 0.015 d? / m*MHz,

d) The amplification, or de-amplification, of the sound wave when it has traveled 14m,

e) Ratio of the initial pressure amplitude to the pressure amplitude once it travels 14m.

Answer 1