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A Noisy Workplace Has a Noise Level of 90 DB

Question 38

Multiple Choice

A noisy workplace has a noise level of 90 dB.You want to reduce this to a more comfortable 75 dB.By what factor must the power of the noise source be reduced? (That is,what is the ratio of the new power to the old?)


A) 0.83
B) 0.67
C) 0.32
D) 0.032
E) 0.010

Correct Answer:

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