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LISSAJOUS PATTERNS
are formed when you combine periodic waves moving back and forth with
periodic waves moving up and down. This exhibit does this electronically
allowing the visitor to control the frequency of the X and Y motions
independently. The resulting pattern can be observed on an oscilloscope
and viewed on moving speakers. If the frequencies are high enough, the
speakers produce sound. The combination of tones can be correlated with
the scope pictures.
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