Ultrasonic transducer, ultrasonic speaker, acoustic system,...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element

Reexamination Certificate

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C381S160000, C367S181000

Reexamination Certificate

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07949143

ABSTRACT:
An ultrasonic speaker or acoustic system includes an electrostatic type ultrasonic transducer of a push-pull system is constructed such that a through hole is arranged in the central portion of a fixing electrode of a circular shape. A sound wave reflecting plate is arranged on the rear face of the ultrasonic transducer and an ultrasonic wave radiated from the rear face of the ultrasonic transducer is reflected by the sound wave reflecting plate and is radiated to the front face of the ultrasonic transducer through the through hole.

REFERENCES:
patent: 3555311 (1971-01-01), Weber
patent: 3894199 (1975-07-01), Tamura et al.
patent: 4190739 (1980-02-01), Torffield
patent: 4836328 (1989-06-01), Ferralli
patent: 4907671 (1990-03-01), Wiley
patent: 5327985 (1994-07-01), Porzilli
patent: 5713916 (1998-02-01), Dias
patent: 6257365 (2001-07-01), Hulsebus, II
patent: 6760455 (2004-07-01), Croft et al.
patent: 6775388 (2004-08-01), Pompei
patent: 7146016 (2006-12-01), Pedersen
patent: 04-351099 (1992-12-01), None
patent: 2786531 (1998-05-01), None
patent: 10-234100 (1998-09-01), None
patent: WO2003/032678 (2003-04-01), None
Kelczynski, pawel Jan; “Ring Piezoelectric Transducers Radiating Ultrasonic Energy into the Air”; Jan. 1990; IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control; vol. 37, No. 1; pp. 38-42.

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