Question

Find out the intensity of sound at point 1 and point 2. The power of sound is 15 × 10^-4 watts and Area at location 1 and 2 are 5 and 10 metre square respectively.

Answer 1

Answer:

Explanation:

Intensity is defined to be the power per unit area carried by a wave. Power is the rate at which energy is transferred by the wave. In equation form, intensity I is  

I

=

P

A

, where P is the power through an area A. The SI unit for I is W/m2. The intensity of a sound wave is related to its amplitude squared by the following relationship:

I

=

(

Δ

p

)

2

2

ρ

v

w