Question

If the intensity level of one trombone is 70 dB, calculate a reasonable estimate for the intensity level of 76 trombones all playing simultaneously in the same place.

Answer 1

89 or 90 dB looks reasonable

Step-by-step explanation:

¶ = (10 dB) log (I/Io)

from the relation above

For each doubling of intensity, we increase 3 dB (10×log 2 = 3)

Given that one (1) trombone = 70dB

2 ====> 73 dB

4 ====> 76 dB

8 ====> 79 dB

16 ====> 82 dB

32 ====> 85 dB

64 ====> 88 dB

128 ====> 91 dB

Good luck