If the power intensity of sound is 0.08 W/m2 at 1 meter distance from the loudspeaker when the amplifier delivers 25 watts, determine the loudspeaker efficiency.

If the power intensity of sound is 0.08 W/m2 at 1 meter distance from

1.	If the power intensity of sound is 0.08 W/m2 at 1 meter distance from the loudspeaker when the amplifier delivers 25 watts, determine the loudspeaker efficiency.
A.	8%
B.	4%
C.	9%
D.	12%
Answer» C. 9%

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If the power intensity of sound is 0.08 W/m2 at 1 meter distance from the loudspeaker when the amplifier delivers 25 watts, determine the loudspeaker efficiency.

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