13 Define noise ? Effects of noise in communication systems ?

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 NOISE :-

  • It is an unwanted form of energy which user not required 
  • it interfere with the message signal and changes the message signal properties.

Effects of noise in communication systems :-

  • It increases the transmitting power
  • noise will be present in the receiver radio/loud speaker
  • it may cause increase / decrease the signal bandwidth
  • Noise effects the sensitivity of the receiver
  • because of noise the message may not be proper for receiver to understand

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