Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Patent
1997-03-17
2000-01-04
Lee, Ping
Electrical audio signal processing systems and devices
Circuitry combined with specific type microphone or loudspeaker
381190, 381173, 381114, 310324, 310328, H04R 300
Patent
active
060118555
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.
REFERENCES:
patent: 4429193 (1984-01-01), Busch-Vishniac
patent: 4439642 (1984-03-01), Reynard
patent: 4558184 (1985-12-01), Busch-Vishniac
patent: 4593160 (1986-06-01), Nakamura
patent: 4672591 (1987-06-01), Breimesser
patent: 4695986 (1987-09-01), Hossack
patent: 4751419 (1988-06-01), Takahata
patent: 4885781 (1989-12-01), Seidel
patent: 4887246 (1989-12-01), Hossack et al.
patent: 4888086 (1989-12-01), Hossack et al.
patent: 5153859 (1992-10-01), Chatigny
patent: 5287331 (1994-02-01), Schindel et al.
patent: 5357578 (1994-10-01), Taniishi
patent: 5638456 (1997-06-01), Conley et al.
Aoki, K., et al., "Parametric Loudspeaker--Characteristics of Acoustic Field and Suitable Modulation of Carrier Ultrasound," Electronics and Communications in Japan, Part 3, vol. 74, No. 9, pp. 76-82 (1991).
Makarov, S.N., et al., "Parametric Acoustic Nondirectional Radiator," Acustica, vol. 77, pp. 240-242 (1992).
Westervelt, P.J., "Parametric Acoustic Array," The Journal of the Acoustical Society of America, vol. 35, No. 4, pp. 535-537 (1963).
Yoneyama, M., et al., "The Audio Spotlight: An Application of Nonlinear Interaction of Sound Waves to a New Type of Loudspeaker Design," J. Acoust. Soc. Am., vol. 75, No.5, pp. 1532-1536 (1983).
Khuri-Yakub Pierre
Selfridge Alan R.
American Technology Corporation
Lee Ping
LandOfFree
Piezoelectric film sonic emitter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Piezoelectric film sonic emitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric film sonic emitter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1078657