Casio electronic synthesizer with amp and speaker.
3C50.12 • B+45+55

Casio CTK-471 Digital Synthesizer. This Synthesizer has many preset instruments. The instrument that is closest approximation to a sine wave is the 'Whistle'. OPTIONAL: An oscilloscope to project video images of the synthesizer waveforms.
Related Demos
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Giant tuning fork, barely audible, displayed with stroboscope. B+45+10
Ultrasound transducers (40 kHz) as both sources and receivers. B+45+15
Bell ringing in a jar evacuated with pump. B+45+20
Savart's wheel: Toothed wheel and cardboard or air jet. B+45+25
Siren: large, electric motor driven. B+45+30
Compressed air jet blows through spinning disk with holes. B+45+32
Twirling Tube B+45+35
Sprockets on shaft rotate against a card to make sound. B+45+40
Caruga horn: Varigated tube to blow through B+45+42
Hoot Tube B+45+45
Galton's whistle: Compressed air whistle. B+45+50
Helmholtz resonators drive radiometer vanes, using tuning forks. B+45+41
Feedback from microphone/speaker system. B+45+51
Helmholtz Resonators with tuning forks and a candle B+45+60
Applet: Vibrational Behavior of an Empty Beer Bottle B+45+65
Applet: Vibrational Modes of a Tuning Fork