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(B) Speech signals are human voice signals which typically have a frequency range from $20 \ Hz$ to $20 \ kHz$. However,for commercial telephonic comm

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$300 \ Hz - 3100 \ Hz$

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(B) Speech signals are human voice signals which typically have a frequency range from $20 \ Hz$ to $20 \ kHz$. However,for commercial telephonic communication,it is not necessary to transmit the entire audible range. To ensure clarity and efficiency in transmission,the frequency range is restricted. The standard frequency range adequate for speech signals in commercial telephony is $300 \ Hz$ to $3100 \ Hz$.

For commercial telephonic communication,the frequency range adequate for speech signals is

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