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Yesterday a friend asked me what is a signal and noise. When I described him he wasn't satisfied and he told me to give him an everyday example. What kind of example would you use to describe them as simple as possible?

Commissar Vasili Karlovic
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    To down-voter - Why the down-vote? Based on one's curiosity and interest I conclude nothing is silly . And till the time you are asking it means you are seeking for more insight into that subject, it is considered good. In real life, how many people understand the difference asked in this question? Engineers included. – cgiovanardi Sep 24 '16 at 14:19
  • One we all experience is noise on cell phone conversations. The signal is the voice of the person you are talking to, the noise is everything else – Ross Millikan Aug 11 '18 at 04:09

2 Answers2

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Some "real world" examples:

  1. Hide and Seek.
  2. Where's Waldo?
  3. Needle in a haystack
  4. Discovering exoplanets
  5. Camouflage
  6. ICBM launch detection
  7. Predator/Prey interactions
ChemStem
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The signal is the truth. The noise is what distracts us from the truth.

https://www.predig.com/whitepaper/reducing-signal-noise-practice https://en.wikipedia.org/wiki/Signal-to-noise_ratio

cgiovanardi
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