Question

If a large housefly 2.4 m away from you makes a noise of 47.0 dB, what is the noise level (in dB) of 5400 flies at that distance, assuming interference has a negligible effect?

Answer 1

the noise level of 5400 flies is equal to 84.32 dB

Step-by-step explanation:

Noise made by house flies = 47 dB from the distance of 2.4 m

to calculate the noise of 5400 flies at a distance of 2.4 m.

the intensity of noise

`10 log_(10)((I)/(I_0)) = 47 dB`

now, I' = 5400 I₀

=
`10 log_(10)((5400 I)/(I_0))`

=
`10 [log_(10)[5400] +log_(10)((I)/(I_0)))`

= 10 ( 3.732 + 4.7 )

= 84.32 dB

hence, the noise level of 5400 flies is equal to 84.32 dB