Physics of a Touch Tone Telephone       

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If you have trouble accessing the files from the website, try over the network folder:
 

PHUN:

touch tone phone songs and more songs
Information about touch tone phone operation: Dual-Tone-Multi-Frequency
a detailed explanation of the touch tone phone frequencies

Hear the sounds here: http://www.telephonetribute.com/tribute/dials-touch_tone.html

last modified 3/10/09