Physical Audio Oscillators

M. Gallant Nov 20, 2010

The audio circuit used for pickup and display consists of a standard dynamic audio microphone coupled to a high-gain low-noise 60 dB audio preamplifier with output displayed on an oscilloscope.

Standard 440 Hz tuning fork:

"Ringing" a Wine Glass: (f = 1.12 kHz with glass empty; 670 Hz with glass half-full)

Human Voice Sample: