Air buoyant piezoelectric polymeric film microphone
First Claim
Patent Images
1. An apparatus for receiving sound waves, comprising:
- a piezoelectric polymer film having electrodes disposed on opposing sides thereof;
air buoyant inflatable means with said film attached thereto for supporting said film in an air buoyant position, said inflatable means is filled with a gas which is lighter in weight than air; and
receiving means electrically coupled with the electrodes of said film for processing the electrical signal generated by said film when said film is caused to vibrate by the pressure of the received sound waves.
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Abstract
Piezoelectric 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.
139 Citations
24 Claims
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1. An apparatus for receiving sound waves, comprising:
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a piezoelectric polymer film having electrodes disposed on opposing sides thereof; air buoyant inflatable means with said film attached thereto for supporting said film in an air buoyant position, said inflatable means is filled with a gas which is lighter in weight than air; and receiving means electrically coupled with the electrodes of said film for processing the electrical signal generated by said film when said film is caused to vibrate by the pressure of the received sound waves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for receiving sound waves, comprising:
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air buoyant inflatable means for housing gas and inflated with a gas which is lighter in weight than air, said air buoyant inflatable means comprises a piezoelectric polymer film having an outer electrode disposed over an outer surface of said film and an inner electrode disposed over an inner surface of said film; and receiving means electrically coupled with the electrodes of said film for processing the electrical signal generated by said film when said film is caused to vibrate by the pressure of the received sound waves. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for receiving sound waves, comprising:
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an inflatable means for housing gas; a piezoelectric polymer film having electrodes on opposing sides thereof attached to said inflatable means, said piezoelectric polymer film generating an electrical signal when said film is caused to vibrate by the pressure of the received sound waves; means electrically coupled with said electrodes for producing an output signal when the waveform of the electrical signal generated by said film corresponds to a reference waveform; and indicating means responsive to said output signal for indicating that the waveform of the electrical signal generated by said film corresponds to the reference waveform.
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24. An apparatus for receiving sound waves, comprising:
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inflatable means for housing gas comprising a piezoelectric polymer film having an outer electrode disposed over an outer surface of said film and an inner electrode disposed over an inner surface of said film, said film generating an electrical signal when it is caused to vibrate by the pressure of the received sound waves; means electrically coupled with said electrodes for producing an output signal when the waveform of the electrical signal generated by said film corresponds to a reference waveform; and indicating means responsive to said output signal for indicating that the waveform of the electrical signal generated by said film corresponds to the reference waveform.
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Specification