Air buoyant piezoelectric polymeric film microphone
January 19, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2778881 2834952 2939970 Piezoelectric-type electroacoustic transducer Vacuum stressed polymer film piezoelectric transducer Piezoelectric polymer membrane stress gage Polymeric piezoelectric transducer with thermoformed protuberances Piezoelectric polymeric film occlusal force indicator Vehicular mounted piezoelectric generator Piezoelectric apparatus for measuring bodily fluid pressure within a conduit InventorAssigneeApplicationNo. 07/145454 filed on 01/19/1988US Classes:310/334, Acoustic wave type generator or receiver310/337, Underwater type310/338, Force or pressure measuring type310/339, Voltage, spark or current generator310/800, PIEZOELECTRIC POLYMERS (E.G., MYLAR, PVDF)381/190Electrostrictive, magnetostrictive, or piezoelectricExaminersPrimary: Budd, Mark O.Attorney, Agent or FirmInternational ClassH04R 17/02 (20060101)AbstractPiezoelectric polymer film, when conformably adhered to inner or outer surfaces of an inflated balloon, functions as a microphone when the pressure of sound waves causes the film to vibrate and generate an electrical signal. The film may be in the form of an helical strip, individual strips electrically serially connected, or may itself form the inflatable material. A receiving device is electrically coupled with the electrodes formed on the piezoelectric film for processing the electrical signals generated by the vibrating piezoelectric polymer film.Other References
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