Given that,
Power = 60 W
Distance = 1.0 m
Distance between speakers = 1.5 m
We need to calculate the intensity
Using formula of intensity
[tex]I_{1}=\dfrac{P}{A}[/tex]
[tex]I_{1}=\dfrac{P}{4\pi r^2}[/tex]
Put the value into the formula
[tex]I_{1}=\dfrac{60}{4\pi\times(1.0)^2}[/tex]
[tex]I_{1}=4.77\ W/m^2[/tex]
We need to calculate the intensity
Using formula of intensity
[tex]I_{2}=\dfrac{P}{A}[/tex]
[tex]I_{2}=\dfrac{P}{4\pi r^2}[/tex]
Put the value into the formula
[tex]I_{1}=\dfrac{60}{4\pi\times(1.5)^2}[/tex]
[tex]I_{1}=2.12\ W/m^2[/tex]
We need to calculate the intensity of the sound waves produced by four speakers
Using formula for intensity
[tex]I'=(I_{1}+I_{2})\times2[/tex]
Put the value into the formula
[tex]I'=(4.77+2.12)\times2[/tex]
[tex]I'=13.78\ W/m^2[/tex]
Hence, The intensity of the sound waves produced by four speakers is 13.78 W/m².
