Question

The sound intensity at the ear of passenger in a car with a damaged muffler is 8.0 × 10-3 W/m2. What is the intensity level of this sound in decibels? Use the threshold of hearing (1.0 × 10-12 W/m2) as the refere

Answer 1

Answer:

99 dB

Explanation:

We have given that sound intensity with a damaged muffler =8× $10^{-3}$

we have to find the intensity level of the this sound in decibels

for calculating in decibels we have to use the formula

β=$10log\frac{I}{I_0}$

  =$10log\frac{.008}{10^{-12}}$

   =10 log8+10 log$10^{9}$

   =10 log8+90 log10

   =10×0.9030+90

   =99 dB