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An audio signal consists of two distinct sounds: one a human speech signal in the frequency band of 200 Hz to 2700 Hz, while the other is a high frequency music signal in the frequency band of 10200 Hz to 15200 Hz. The ratio of the AM signal band width required to send both the signals together to the AM signal band width required to send just the human speech is:

Options

  1. A3
  2. B5
  3. C6
  4. D2

Correct answer

A. 3

Step-by-step solution

Band width for Music signal = 15200 − 10200 = 5000 H z Band width for speech signal = 2700 − 200 = 2500 H z Band with for Both = 2500+5000=7500 Hz Band with for Human speech =2500 Hz Required Ratio = 7500 2500 = 3 1

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