PURPOSE: To show the loudspeaker motion produced by waves of various shapes.
DESCRIPTION: Using periodic waves of a few Hertz, the shape, amplitude and symmetry of the pulses can be observed by watching the movement of the speaker cone. The oscillator must have a reasonably large amplitude.
SUGGESTIONS: Video projection available for large halls.
REFERENCES: (PIRA unavailable.)
EQUIPMENT: Wavetek oscillator and large speaker.
SETUP TIME: None.
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