Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1988-03-25
1991-12-03
Isen, Forester W.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
H04R 2500
Patent
active
050705300
ABSTRACT:
A loudspeaker includes a radially slotted ceramic permanent magnet for reducing distortion. Other constructions include slotted top and bottom plates and radially slotted bucking magnets, in combination with slotted magnet loudspeakers. The slotted bucking magnets may be retrofitted to conventional loudspeakers.
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Handbook of Sound Reproduction, Audio Library, vol. II, Radio Magazines, Inc. 1957, pp. 76 & 82-83.
"A to Z in Audio" by G. A. Briggs, Gernshack Library, Inc., 1961, p. 122.
Cornwell David G.
Grodinsky Robert M.
Byrd D. R.
Camasto Nicholas A.
Isen Forester W.
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