Acoustic Transducer

Details Acoustic Transducer Acoustic Transducer

1994-06-06

1996-08-20

Kuntz, Curtis

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381174, 367170, H04R 2500

Patent

active

055486584

ABSTRACT:
An electret assembly for a microphone is disclosed. The microphone is adapted for use with a hearing aid. The electret assembly comprises a motor ring having first and second opposing peripheral surfaces and an aperture extending therebetween. The motor ring includes four generally co-planer ledges recessed below the first opposing surface and defining a rectangle. A charged plate is disposed on the ledges. The charged plate is substantially flush with the first opposing surface. A flexible diaphragm is secured to the second opposing surface and extending across the aperture. A bead of epoxy secures the charged plate to the motor ring.

REFERENCES:
patent: 4063050 (1977-12-01), Carlson et al.
patent: 4316062 (1982-02-01), Beveridge
patent: 4701640 (1987-10-01), Flygstad et al.
patent: 4730283 (1988-03-01), Carlson et al.
patent: 4764690 (1988-08-01), Murphy et al.
patent: 4815560 (1989-03-01), Madaffari
patent: 5075991 (1991-12-01), Wenkman et al.

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