Whole surface driven speaker

Details Whole surface driven speaker Whole surface driven speaker

1988-09-28

1991-03-26

Ng, Jin F.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381196, 381199, H04R 900

Patent

active

050036106

ABSTRACT:
A whole surface driven speaker includes a diaphragm of an insulating plastic sheet carrying a conductor coil pattern. A foamed mica plate is bonded to the diaphragm. Two groups of permanent magnets are arranged on both sides of the diaphragm and oppose each other with pole faces of the same polarity across the diaphragm but with poles faces of opposite polarity adjoining each other on each side of the diaphragm.

REFERENCES:
patent: 1403849 (1922-01-01), Delany
patent: 3922504 (1975-11-01), Kishikawa et al.
patent: 3997739 (1976-12-01), Kishikawa
patent: 4471173 (1984-09-01), Winey
patent: 4544806 (1985-10-01), Nieuwendijk
patent: 4699242 (1987-10-01), Ono
patent: 4803733 (1989-02-01), Carver

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