Types of Noise in Communication

Mar 24 • Notes • 62738 Views • 73 Comments on Types of Noise in Communication

In electrical terms, noise is defined as the unwanted form of energy which tends to interface with the proper reception and the reproduction of transmitted signals. Electronic Devices unwanted random addition to the signal are considered as Noise. Their are various types of Noise presents. The Acoustic Noise is observed when the signals are converted into sound which is generally know as snow in TV or video Images. In signalling processing or computing noise can be considered random unwanted data without meaning that is, data that is not being used to transmit signal, but is simply produced as an unwanted by-product of other activities. “signal to noise ratio” is sometimes used to refer to the ratio of useful to irrelevant information in an exchange. Here in this post, Description of Noise of with Classification are explained in detail. If you are interested you can find out more details on various topics from Note Section.

Click on Whatapp logo to join oureducation GATE group with many students

“In common use, the word noise means any unwanted sound”. Unwanted signal are called noise.

Noise

Noise

Classification of Noise:

There are several way to classify Noise, but conveniently Noise is classified as
1) External Noise
2) Internal Noise

External Noise:

External noise is defined as the type of Noise which is general externally due to communication system. External Noise are analysed qualitatively. Now, External Noise may be classified as

a) Atmospheric Noise : Atmospheric Noise is also known as static noise which is the natural source of disturbance caused by lightning, discharge in thunderstorm and the natural disturbances occurring in the nature.

b) Industrial Noise : Sources of Industrial noise are auto-mobiles, aircraft, ignition of electric motors and switching gear. The main cause of Industrial noise is High voltage wires. These noises is generally produced by the discharge present in the operations.

c) Extraterrestrial Noise : Extraterrestrial Noise exist on the basis of their originating source. They are subdivided into
i) Solar Noise
ii) Cosmic Noise

Internal Noise:

Internal Noise are the type of Noise which are generated internally or within the Communication System or in the receiver. They may be treated qualitatively and can also be reduced or minimized by the proper designing of the system. Internal Noises are classified as

1) Shot Noise : These Noise are generally arises in the active devices due to the random behaviour of Charge particles or carries. In case of electron tube, shot Noise is produces due to the  random emission of electron form cathodes.

2) Partition Noise : When a circuit is to divide in between two or more paths then the noise generated is known as Partition noise. The reason for the generation is random fluctuation in the division.

3) Low- Frequency Noise : They are also known as FLICKER NOISE. These type of noise are generally observed at a frequency range below few kHz.  Power spectral density of these noise increases with the decrease in frequency. That why the name is given Low- Frequency Noise.

4) High- Frequency Noise : These noises are also known TRANSIT- TIME Noise. They are observed in the semi-conductor devices when the transit time of a charge carrier while crossing a junction is compared with the time period of that signal.

5) Thermal Noise : Thermal Noise are random and often referred as White Noise or Johnson Noise. Thermal noise are generally observed in the resistor or the sensitive resistive components of a complex impedance due to the random and rapid movement of molecules or atoms or electrons.

Link for pdf: Communication Engineering Notes on Noise

Related Links:

Your thoughts/feedback are always appreciated for the further improvement.

Tell us Your Queries, Suggestions and Feedback

Your email address will not be published.

73 Responses to Types of Noise in Communication

  1. Rajesh Chand says:

    Signals and systems models.

  2. Zeenath says:
  3. Zeenath says:
  4. Anonymous says:
  5. asmaalaila says:
  6. JAMES says:

    UNIVERSITY

  7. JAMES says:

    UNIVERSITY

  8. james says:

    UNIVERSITY

  9. Anonymous says:
  10. zahid says:

    electronic basic ssystems

  11. Anonymous says:
  12. magdalena says:

    Enter your any educational query or doubtu

  13. yogesh gehlot says:
  14. yogesh gehlot says:
  15. Anonymous says:
  16. Vindya says:

    I want to know about noise due to emi?

  17. Vindya says:

    I want to know about noise due to emi?

  18. onyango isaac philip says:

    types of noise

  19. onyango isaac philip says:
  20. yawar ahmad bhat says:

    laplase transform

  21. yawar ahmad bhat says:

    laplase transform

  22. yawar ahmad bhat says:

    laplase transform

  23. yawar ahmad bhat says:

    laplase transform

  24. yawar ahmad bhat says:

    laplase transform

  25. yawar ahmad bhat says:

    laplase transform

  26. yawar ahmad bhat says:
  27. yawar ahmad bhat says:
  28. yawar ahmad bhat says:
  29. yawar ahmad bhat says:
  30. yawar ahmad bhat says:
  31. yawar ahmad bhat says:
  32. yawar ahmad bhat says:
  33. yawar ahmad bhat says:
  34. yawar ahmad bhat says:
  35. yawar ahmad bhat says:
  36. yawar ahmad bhat says:
  37. yawar ahmad bhat says:
  38. yawar ahmad bhat says:
  39. yawar ahmad bhat says:
  40. yawar ahmad bhat says:
  41. yawar ahmad bhat says:
  42. yawar ahmad bhat says:
  43. yawar ahmad bhat says:
  44. yawar ahmad bhat says:
  45. chepkirui mercy says:

    types of noises (communication)

  46. Mohsina says:
  47. ode bros says:

    noise and it’s types in communication in English

  48. ode bros says:

    noise and it’s types in communication in English

  49. Samuel says:

    i want to develop a tic_tac_toe game in C language on linux
    i wrote the code it doesnt have errors but its not running

  50. neha k thote says:

    engineering

  51. neha k thote says:

    engineering

  52. neha k thote says:

    engineering

  53. neha k thote says:

    engineering

  54. neha k thote says:

    engineering

  55. neha k thote says:

    engineering

  56. neha k thote says:

    engineering

  57. neha k thote says:

    engineering

  58. neha k thote says:

    engineering

  59. neha k thote says:

    engineering

  60. neha k thote says:

    engineering

  61. neha k thote says:

    engineering

  62. Reuben Mumba says:

    the best system of communication is achieved with the least paper work. say how far you agree with this statement and explain the advantages of oral and written communication in business

  63. prakash says:

    Types of source of noise in communication system??

  64. Martin Nthere says:

    A prominent novelist critic of the management scene once stated, “I do not think we can go on very much longer with the luxurious practice of hiring ten men to make one man’s decision. With all its advantages, professional management tends to encourage bureaucratic corpulence.” Comment. This is a question For Communication Skills, What are they asking for here?

  65. christabel ndashi says:

    who is a prominent novelist critic of the management scene and what did he state?

  66. Euna says:

    Critics on a novelist of the management once said, ” I do not think we go on very much longer with luxurious practice of hiring ten men to make one man’s decision .With all its advantages ‘ professional management tends to encourage bureaucratic corpulence ” Comment

  67. Anorld says:

    A prominent novelist critic of the management scene once stated, “I do not think we can go on very much longer with the luxurious practice of hiring ten men to make one man’s decision. With all its advantages, professional management tends to encourage bureaucratic corpulence.” Comment.

  68. Sunday Adewole OYEKAN says:

    How can we mitigate noise(both internal and external) in communication systems, using multidimensional bit sequences?

  69. tabassum says:

    different types of noise in communication circuits.

  70. Linet says:

    what is the formula fo calculating signal to noise ratio at the output of the amplifier

  71. RESHMI CHANDRAN says:

    In speech signal processing we are using diifferent types of wavelet for different noises. Can I have the details of diffent types of noises and their respective wavelets??

  72. victor chigozie says:

    mathematical expressions of different types of noise in communication system

« »