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: