Porous gas reservoir electrostatic transducer
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United States of America Patent
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-
Oct 28, 1997
Grant Date -
N/A
app pub date -
Sep 7, 1995
filing date -
Jul 14, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrostatic transducer in which a plurality of perforated sheets are arranged adjacent one another in a stack. A gas-filled gap separates each adjacent pair of sheets. Conductive surfaces on each sheet impose an electric field within the respective gaps. A flexible positioning mechanism disposed between each adjacent pair of sheets maintains a desired average thickness of the gaps. A high porosity gas reservoir structure is fixed to one outer end of the stack, such that gas may flow through the sheets between the respective gaps and the reservoir. A cover sheet fixed to an end of the stack opposite the reservoir prevents gas flow between the gaps and the region external to the stack during operation of the transducer within its intended operating frequency range.
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