Piezo-electric speaker

Details Piezo-electric speaker Piezo-electric speaker

2007-01-23

2007-01-23

Swerdlow, Daniel (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electrostrictive, magnetostrictive, or piezoelectric

C381S152000

Reexamination Certificate

active

09940729

ABSTRACT:
The present invention intends to provide a piezo-electric speaker which can generate a sound from the low frequency range to the high frequency range as well as transmit the acoustic vibration to a sound-board with a high efficiency. This is achieved by providing a piezo-electric speaker comprising a piezo-electric member generating a strain according to an electric signal applied thereto; a piezo-electric vibration plate converting the strain to the acoustic vibration; and a sound-board resonating to the acoustic vibration; the piezo-electric plate being supported on the sound-board; the acoustic vibration caused by the piezo-electric vibration plate being propagated from the sound-board to the ambient air to generate a sound.

REFERENCES:
patent: 3721840 (1973-03-01), Yamada
patent: 4820952 (1989-04-01), Lee
patent: 5641164 (1997-06-01), Doederlein et al.
patent: 5761324 (1998-06-01), Kanai et al.
patent: 6332029 (2001-12-01), Azima et al.

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