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?

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) (Show Source): You can put this solution on YOUR website!
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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