Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Reexamination Certificate
2011-05-24
2011-05-24
Kuntz, Curtis (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
C381S160000, C367S181000
Reexamination Certificate
active
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.
Matsuzawa Kinya
Sekino Hirokazu
Harness Dickey & Pierce PLC
Kuntz Curtis
Robinson Ryan
Seiko Epson Corporation
LandOfFree
Ultrasonic transducer, ultrasonic speaker, acoustic system,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic transducer, ultrasonic speaker, acoustic system,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic transducer, ultrasonic speaker, acoustic system,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2689146