the power output of an audio system is 18 w. For persone to notice an increase in the output (loudness or sound intensity) of the system what must be the out put power be increased to?
A. 14.2 w
B. 22.68w
c. 11.6 w
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Given info : The power output of an audio system is 18 w. For persone to notice an increase in the output (loudness or sound intensity) of the system.
To find : the output power must be increased to
Solution : to notice loudness, sound level should be increased by 1 dB.
But we know, to increase the sound level by 1 dB, the power must be increased by 26%.
I.e., final output power = 18 Watt + 26% of 18 watt
= 18 + 26 × 18/100
= 18 watt +4.68 watt
= 22.68 watt
therefore the output power must be increased to 22.68 watt
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