Fig. 11.1 shows a microphone connected directly to an amplifier having a gain of 63dB.
amplifier
gain 63dB
wire pair receiver
microphone
Fig. 11.1
The microphone and amplifier are connected to a receiver by means of a wire pair having
an attenuation of 12dB per kilometre length. The output signal from the microphone is
Question
Physics
CAIE2016
A microphone is connected directly to an amplifer having a gain of 63 dB, as shown in Fig. 5.1.
amplifier
gain 63 dB
wire pair receiver
microphone
Fig. 5.1
The microphone and amplifi er are connected to a receiver by means of a wire pair having an
attenuation of 12 dB per kilometre length. The power of the output signal from the microphone is