if you are sitting 8.20 m from a 70.0 W speaker, what is the sound level...

Question

Question

if you are sitting 8.20 m from a 70.0 W speaker, what is the sound level in dB?

Answer 1

Answer #1

intensity is given by

I = P / ( 4 pi r^2)

I = 70 / ( 4* 3.14* 8.2^2)

I = 0.0829 W/m^2

now,

B = 10 log ( I/ 10^-12)

B = 109.184 dB

Answer 2

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