Question

What is the sound intensity level of a sound with an intensity of 4.0×10−6 W/m2 ?

Express your answer in decibels.

Answer 1

Answer: 66.02dB

Explanation: We use the equation β=(10dB)㏒(
`(I)/(I_0)`)

`I_(0)`= the threshold of hearing which is 1.0×
`10^(-12)`W/
`m^(2)`

Plug in our knowns β=(10dB)㏒(
`(4.0*10^(-6) )/(1.0*10^(-12) )`)=66.02dB