anonymous
  • anonymous
How frequency is converted to numeric number,for example i clicked on '1' of my keypad and it is shown in screen of my mobile or computer? I seem, this happens not only for number but also for others keys of keyboard.What is the fact behind it?
Engineering
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Programs and circuits.
anonymous
  • anonymous
You might be referring to Dual-tone Multifrequency signalling used in telephony... hope this helps... :) http://www.engineersgarage.com/tutorials/dtmf-dual-tone-multiple-frequency
anonymous
  • anonymous
thanks for your help @Orion and @Johnbc is DTMF is used in modern technology like android,iphone and others ?

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anonymous
  • anonymous
yes it is... apps in android, iphone and others depending on your skills in programming can do it....

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