Audio transducer with flexible foam enclosure

Details Audio transducer with flexible foam enclosure Audio transducer with flexible foam enclosure

1995-02-03

1996-10-29

Kuntz, Curtis

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381193, H04R 2500

Patent

active

055704298

ABSTRACT:
An audio transducer includes a rigid base plate and a flexible foam element attached to the plate. The foam element has a "B" shaped cross section, with a plastic film diaphragm conformally attached to the dual semi-cylindrical front surface of the foam element. The foam element defines a large circular bore for receiving a magnet assembly attached to the plate, with a electrical coil attached to the diaphragm and received within a gap defined within the magnet assembly. The plate and diaphragm are sealed to the foam element to provide an environmentally sealed chamber within the bore.

REFERENCES:
patent: 1821469 (1931-09-01), Hicks
patent: 3612783 (1971-10-01), Schneider
patent: 4584439 (1986-04-01), Paddock
patent: 4903308 (1990-02-01), Paddock et al.
patent: 4939783 (1990-07-01), Dunning
patent: 5127060 (1992-06-01), Paddock
patent: 5198624 (1993-03-01), Paddock et al.

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