General purpose modular acoustic signal generator
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United States of America Patent
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Jul 22, 1986
Grant Date -
N/A
app pub date -
Apr 29, 1983
filing date -
Apr 29, 1983
priority date (Note) -
Expired
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Abstract
A general purpose modular acoustic signal generator includes an outer casing unit having a plurality of disengageably connected sections and an insert unit removably positioned in that outer casing unit. The insert unit has a piezoelectric acoustic generator disc mounted thereon and defines a Helmholtz resonator on each side of the acoustic generator disc. A single outer casing is usable with a plurality of different insert units so a single outer casing unit can be associated with a plurality of different Helmholtz resonators.
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