In the laboratory workshop, the noise intensity level reached 80 dB. In order to reduce noise it was decided to cover the walls of this room with a sound -absorbing material that reduces the sound intensity by 1000 times, What level of noise intensity will be in this room after that?

Question

In the laboratory workshop, the noise intensity level reached 80 dB. In order to reduce noise it was decided to cover the walls of this room with a sound -absorbing material that reduces the sound intensity by 1000 times, What level of noise intensity will be in this room after that?

Answer 1

The noise intensity level in decibels is a logarithmic measure, which means that each increase of 10 dB represents a tenfold increase in sound intensity. Therefore, to reduce the sound intensity by 1000 times, we need to decrease the noise level by 30 dB (since^(-3) = 10^(-30/10) = 10^(-3) = 30 dB).So, if the original noise level was 80 dB, after reducing the sound intensity by 30 dB, the new noise level will be 80 dB - 30 dB = 50 dB.

Вопрос

In the laboratory workshop, the noise intensity level reached 80 dB. In order to reduce noise it was decided to cover the walls of this room with a sound -absorbing material that reduces the sound intensity by 1000 times, What level of noise intensity will be in this room after that?

Решения

Ответ