If the intensity level by 15 identical engines in a garage is 100 db, what is the intensity level generated by each one of these engines?

To develop this problem we will apply the concepts related to Sound Intensity. This can be defined as the power carried by sound waves per unit area in a direction perpendicular to that area. Mathematically it can be written as,

= Level Difference

n = Number of equal loud sound sources

n = 15

Therefore replacing we have,

Therefore over 100dB the total difference intensity level would be

Here,

The intensity level generated by one engine is

1/0.14nm = 10^10/1.4 a lot