The sound level in a quiet room is 49 dB. Approximately how many times louder is it when a TV is turned on and the sound level is 79 dB? Hint: For every 10 dB the perceived sound level increases by a factor of 2.
A) 4
B) 8
C) 1.6
D) 6
1
Expert's answer
2014-10-21T00:59:48-0400
Answer:Change of soundlevel equals: 79dB-49dB=39dB For every 10 dB the perceivedsound level increases by a factor of 2, therefore for 30 dB perceived sound level increases by a factor . Answer: 8
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