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Sound source emits signal with 100 Pa amplitude. Some distance away the signal was reduced by 60 dB and received by a microphone having sensitivity

Sound source emits signal with 100 Pa amplitude. Some distance away the signal was reduced by 60 dB and received by a microphone having sensitivity 20 mV/Pa. Microphone output was amplified by 20 dB. Find voltage output of the microphone amplifier.

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