Whole-surface driven speaker
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United States of America Patent
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-
Mar 26, 1991
Grant Date -
N/A
app pub date -
Feb 10, 1989
filing date -
Feb 15, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A whole-surface driven speaker includes first and second support plates having sound-passing perforations and groups of magnets mounted on the plates. The plates are substantially parallel to each other. A diaphragm is disposed in between the plates. A plurality of conductor strips are mounted on the surface of the diaphragm. The strips are connected to receive pulse-code modulated signals. The strips respectively correspond to a plurality of binary bits of the signals of different bit significance. Each strip has a predetermined width and a predetermined number of windings and carries a predetermined current magnitude such that electromechanical forces on the diaphragm caused by the bit signals flowing through the strips are proportional to the respective bit significance of the strips.
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