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electronics and communication engineering measurements and instrumentation
1. If reference sound pressure P0 is 2 x 10-5 N/m2, a sound pressure of 90 dB is equal to
(A): 0.632 N/m2
(B): 0.707 N/m2
(C): 0.835 N/m2
(D): 0.925 N/m2
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By: guest on 02 Jun 2017 01.00 am
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