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A speaker emits sound waves in all directions, and at a distance of 28 m from it the intensity level is 73 db. What is the total power put out by the speaker, in watts?

A speaker emits sound waves in all directions, and at a distance of 28 m from it the intensity level is 73 db. What is the total power put out by the speaker, in watts?
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A speaker emits sound waves in all directions, and at a distance of 28 m from it the intensity level is 73 db. What is the total power put out by the speaker, in watts?

asked
User Night
by
7.6k points

1 Answer

6 votes

Answer:

P=0.197 Watt

Step-by-step explanation:

Given That

B=73dB

Io= 1 * 10^-12


I=Io * 10^{(B)/(10) } \\I=2 * 10^(-5) Wm^(-2) \\A=4 * pi * r^(2)\\ A=9852.03 m^(2)\\ Power= I * A\\P= 0.197 Watt

answered
User Pilpo
by
8.3k points
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