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Explaining Telecommunication

  1. Apr 15, 2016 #1
    How telecommunications work? I mean, there are so much waves around us nowadays, how my cellphone recognizes a single signal and rings only when it detects it? If my cellphone is a receipter, why can't I listen to my neighbor converstation, why isn't there a lot of interference and how waves, from my basement, successfully make their way to a very high antenna? I know I ask a lot, but I'm very curious and I know nothing.
  2. jcsd
  3. Apr 15, 2016 #2


    Staff: Mentor

  4. Apr 16, 2016 #3


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    Part of it is that your cell phone contains an electronic receiver that is capable of filtering out everything but a small band of frequencies that your own phone uses, so most of that interference is simply filtered out.
  5. Apr 16, 2016 #4
    It's clearer now, thanks!
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