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Communication Systems - Engineering

Q1:

Signal to noise ratio of microphone is defined as the ratio of output when the sound pressure is __________ to the output in the absence of any sound signal.

A 0.5 Pa

B 0.2 Pa

C 0.1 Pa

D 0.01 Pa

ANS:C - 0.1 Pa

0.1 Pa (= 0.5 x 10-4 W/m2) is taken as standard sound pressure for defining S/N ratio of microphones.