Chapter 10, Problem 15STP

To determine

To Explain:People who work on the ground near jet runways wear big ear muffs filled with a sound insulator.

Explanation of Solution

Introduction:

Human ear is processed to hear sound up to a certain limit. The loudness of sound is measured in decibels. If the sound is more than the prescribed limit of ear then it might cause hearing loss.

The jet while taking off in runways cause huge noise in the grounds. The loudness or intensity of sound while taking off is around 150 dB which is more than the limit of 120dB for human ear. It is already known that prolonged use of sound more than 85 dB causes damage to human ear. Hence people who work near grounds need precautions for ear, as such insulators called ear muffs are worn by the workers. These insulators reduce the amount of sound and protects the ear from hearing loss.