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The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?

/ Electrical Engineering Mcqs, Multi-Stage Transistor Amplifiers / By
The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?

A. 2 W
B. 6 W
C. 68 W
D. None of the above