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Two diagrams compare message transmission over a channel with different noise levels: the top shows a clear message with little noise, while the bottom shows a distorted message with considerable noise, illustrating information theory concepts.
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noise

telecommunications
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Two diagrams compare message transmission over a channel with different noise levels: the top shows a clear message with little noise, while the bottom shows a distorted message with considerable noise, illustrating information theory concepts.
communication: noise In electronics and information theory, noise refers to those random, unpredictable, and undesirable signals, or changes in signals, that mask the desired information content.

In telecommunications, noise refers to random, unpredictable signals that interfere with and mask the intended information signal. This unwanted interference can manifest as static in radio transmissions or "snow" on television screens. Noise can originate from natural sources, such as lightning, or from human-made sources, like electrical power lines and machinery. It can also arise from the inherent random movement of electrons within electronic components. Noise, along with distortion and attenuation, degrades the quality of transmitted signals and can lead to errors in reception. Various techniques, including signal processing and increasing transmitter power to improve the signal-to-noise ratio, are employed to mitigate its effects.123

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4 Britannica Sources
  1. telecommunications media - Transmission media and the problem of signal degradation
  2. noise
  3. noise
  4. radio technology - Radio noise, fading, and interference

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