Question

A person shouting at the top of his lungs emits aboue 1.0 w of energy as sound waves. What is the sound intensity 1.0 m from such a person

Answer 1

`I=0.0795\ W/m^2`

Step-by-step explanation:

When a person shouts it emits 1 W of energy as sound waves, P = 1 W

Let I is the sound intensity 1 meters from such a person. We know that the power per unit area is called the sound intensity of the person. Its formula is given by :

`I=(P)/(A)`

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

`I=(1\ W)/(4\pi (1\ m)^2)`

`I=0.0795\ W/m^2`

So, the sound intensity of such a person is
`0.0795\ W/m^2`. Hence, this is the required solution.