Explaining Telecommunication

  • #1
33
2
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.
 

Answers and Replies

  • #3
Drakkith
Staff Emeritus
Science Advisor
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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

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.
 
  • #4
33
2
It's clearer now, thanks!
 

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