Piezoelectric film sonic emitter
First Claim
1. A speaker device for emitting subsonic, sonic or ultrasonic compression waves, said device being comprised of:
- a rigid emitter plate having an outer face oriented outward and an inner face, said emitter plate having a plurality of apertures extending between the outer and inner faces;
a thin piezoelectric film disposed across the apertures of the emitter plate, wherein the thin piezoelectric film is configured to be distended into an arcuate emitter configuration at each of the plurality of apertures;
electrical contact means coupled to the piezoelectric film for providing an applied electrical input; and
pressure means coupled to the emitter plate for developing a biasing pressure with respect to the thin film at the apertures to distend the film at each of the plurality of apertures into an arcuate emitter configuration capable of constricting and extending in response to variations in the applied electrical input at the piezoelectric film to thereby create a compression wave in a surrounding environment.
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0 Petitions
Accused Products
Abstract
A speaker device for emitting subsonic, sonic or ultrasonic compression waves comprising a generally hollow drum, a rigid emitter plate attached to the drum, and a plurality of apertures formed within the plate which are covered by a thin piezoelectric film disposed across the emitter plate. A pressure source is coupled to the drum for developing a biasing pressure with respect to the thin film at the apertures to distend the film into an arcuate emitter configuration capable of constricting and extending in response to variations in the applied electrical input at the piezoelectric film to thereby create a compression wave in a surrounding environment. Parametric ultrasonic frequency input is supplied to the piezoelectric film to propagate multiple ultrasonic frequencies having a difference component corresponding to the desired subsonic, sonic or ultrasonic frequency range.
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Citations
42 Claims
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1. A speaker device for emitting subsonic, sonic or ultrasonic compression waves, said device being comprised of:
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a rigid emitter plate having an outer face oriented outward and an inner face, said emitter plate having a plurality of apertures extending between the outer and inner faces; a thin piezoelectric film disposed across the apertures of the emitter plate, wherein the thin piezoelectric film is configured to be distended into an arcuate emitter configuration at each of the plurality of apertures; electrical contact means coupled to the piezoelectric film for providing an applied electrical input; and pressure means coupled to the emitter plate for developing a biasing pressure with respect to the thin film at the apertures to distend the film at each of the plurality of apertures into an arcuate emitter configuration capable of constricting and extending in response to variations in the applied electrical input at the piezoelectric film to thereby create a compression wave in a surrounding environment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A speaker device for emitting subsonic, sonic or ultrasonic compression waves, said device being comprised of:
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a rigid emitter plate having an outer face oriented outward and an inner face, said emitter plate having a plurality of apertures extending between the outer and inner faces; a thin piezoelectric film disposed across the apertures of the emitter plate, wherein the thin piezoelectric film is configured to be distended into an arcuate emitter configuration at each of the plurality of apertures; electrical contact means coupled to the piezoelectric film for providing an applied electrical input; and pressure means coupled to the rigid emitter plate for developing a positive biasing pressure with respect to the thin film at the apertures to distend the film at each of the plurality of apertures into an arcuate emitter configuration capable of constricting and extending in response to variations in the applied electrical input at the piezoelectric film to thereby create a compression wave in a surrounding environment. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification