POLYPHONIC SOUND GENERATING METHOD
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United States of America Patent
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Issued Date -
Jun 18, 2009
app pub date -
Nov 14, 2005
filing date -
Dec 1, 2004
priority date (Note) -
Abandoned
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Abstract
Method of driving an acoustic piezoelectric transducer (6) characterized in that a signal (8), resulting from the time multiplexing of at least two rectangular periodic signals (12a, 12b) of different frequencies and having pulses of fixed duration and whose duty cycle is less than 0.5, is applied to the terminals of the transducer (6). This signal may result from the time sum of at least two undulating logic signals of different durations.
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