DTMF Made Visible
Another bit of noodling I did over the past few days, I’m playing with the frequency mapping of the DTMF (or TouchTone™) sounds used in telephony. These tones are becoming less and less prevalent as mobile phones replace land lines, so this is something of a latter-day portrait of a mature technology. The colors are okay, but I’ll probably play with them some more. Pictured here are the ringback tone, dial tone, and busy signal. I’ll do the numberpad presently.
Pingback: Patterns in the DTMF Number Pad | Mindhue Studio