Difference between revisions of "DTMF"

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(freq table)
m (Intro)
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{| class="wikitable"
 
{| class="wikitable"
|+ DTMF keypad frequencies (with sound clips)
+
|+ DTMF keypad frequencies
 
|-
 
|-
 
!align=center|
 
!align=center|
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https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling
 
https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling
 
 
  
 
== Goertzel ==
 
== Goertzel ==

Revision as of 20:06, 19 September 2014

Intro

640px-66a3aDTMFpad.jpg
DTMF keypad frequencies
1209 Hz 1336 Hz 1477 Hz 1633 Hz
697 Hz 1 2 3 A
770 Hz 4 5 6 B
852 Hz 7 8 9 C
941 Hz * 0 # D

https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling

Goertzel

https://en.wikipedia.org/wiki/Goertzel_algorithm


Stuffs