SOLUTION: 4. A pneumatic drill makes a noise measured at 114 dB. Ordinary traffic is measures at 68 dB. How many times louder is the pneumatic drill than the ordinary traffic?

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Question 314581: 4. A pneumatic drill makes a noise measured at 114 dB. Ordinary traffic is measures at 68 dB. How many times louder is the pneumatic drill than the ordinary traffic?
Answer by stanbon(75887) About Me  (Show Source):
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4. A pneumatic drill makes a noise measured at 114 dB.
Ordinary traffic is measures at 68 dB.
How many times louder is the pneumatic drill than the ordinary traffic?
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Drill loudness:
114 = 10log(x)
log(x) = 11.4
x = 10^11.4
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Traffic loudness:
68 = 10log(y)
log(y) = 6.8
y = 10^6.8
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How many times louder is the pneumatic drill than the ordinary traffic?
10^11.4/10^6.8 = 10^(11.4-6.8) = 10^4.6 = 39810
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Drill loudness = 39810*traffic loudness
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Cheers,
Stan H.
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