Magnetic field structure for planar speaker

Details Magnetic field structure for planar speaker Magnetic field structure for planar speaker

1979-01-24

1980-07-01

Moffitt, James W.

179119R, H04R 906

Patent

active

042107865

ABSTRACT:
An acoustical electromagnetic transducer as a loudspeaker and having a vibrating diaphragm with signal current carrying wires on the face thereof; a magnetic structure confronting the diaphragm in spaced relation and having a magnetic sheet metal plate and a plurality of permanent magnet strips on the panel and spaced from each other and along the runs of the conductor on the diaphragm, the permanent magnet strips being formed of a different magnetic material with a significantly different magnetic characteristic than the strips adjacent thereto.

REFERENCES:
patent: 3013905 (1961-12-01), Gamzon et al.
patent: 3674946 (1972-07-01), Winey
patent: 3873784 (1975-03-01), Doschek
patent: 3919499 (1975-11-01), Winey

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