John works as a ground staff at a military airport. While monitoring the test flight of a jet plane, he accidentally stands too close the engine and the loud noise renders him deaf. This permanent dam

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John works as a ground staff at a military airport. While monitoring the test flight of a jet plane, he accidentally stands too close the engine and the loud noise renders him deaf. This permanent damage to his hearing is possible when the sound level is

TestHub · Accepted Answer

Noise is undesired high level of sound. We have got used to associating loud sounds with pleasure and entertainment not realising that noise causes psychological and physiological disorders in humans. The bigger the city, the bigger the function, the greater the noise!! A brief exposure to extremely high sound level, 150 dB or more generated by take off of a jet plane or rocket, may damage ear drums thus permanently impairing hearing ability.

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