Plasma Speaker – News – SparkFun Electronics

this is a plasma speaker created by Brian Hainey and Chris Lewis, engineering students at Eastern Washington University. The speaker above is not your typical sound output device, but rather features a TL494 PWM chip which provides a 45 kHz “carrier” signal onto which audio can be modulated. This transmits audio data that is detected by a microphone in MATLAB (you remember MATLAB right? Of course you do…), and then processed with Simulink to generate text data.

via Plasma Speaker – News – SparkFun Electronics.