While enjoyable,rock concerts can be damaging to one's hearing.If you are sitting in the front row of a rock concert 5 m from the speaker system,and the sound intensity is 120 dB,how far back would you have to be such that the sound intensity drops below the recommended safe level of 90 dB?

Question

Quizplus · Accepted Answer

The sound intensity level decreases by 6 dB each time the distance from the source is doubled. To decrease from 120 dB to 90 dB, a reduction of 30 dB is needed, which requires doubling the distance 5 times (2^5 = 32). Starting at 5 m, the distance becomes 5 m * 32 = 160 m.

While Enjoyable,rock Concerts Can Be Damaging to One's Hearing