Telecommunications Question:
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Frequency at which VOICE is sampled is?
a) 4 KHz
b) 8 KHz
c) 16 KHz
d) 64 KHz

Answer:

The voice signals have a bandwidth of 4Khz (300hz-3400hz signal bandwidth + 450*2hz guard bands= 4000hz) according to Nyquist criteria, the sampling rate must be at least double of this total bandwidth. thus sampling rate= 2*4Khz = 8Khz. this is the required sampling rate to avoid loss of voice signals in transmission.

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