Question

14) A barking dog delivers about 1 mW of power, which is assumed to be uniformly distributed in all directions. What is the intensity level at a distance 5.00 m from the dog?

Answer 1

Intensity of sound is given as

`I = 3.18 * 10^(-6) W/m^2`

Step-by-step explanation:

As we know that the intensity of the sound is defined as power received per unit area

So here we know that dog delivers total power

P = 1 mW

now it delivers it into spherical area of radius r = 5 m

now we have

`I = (P)/(4\pi r^2)`

so we have

`I = (1* 10^(-3))/(4\pi(5^2))`

`I = 3.18 * 10^(-6) W/m^2`