Electroacoustic transducer for hearing aids

Details Electroacoustic transducer for hearing aids Electroacoustic transducer for hearing aids

1980-07-15

1983-04-19

Stellar, George G.

179107BC, 179117, 179121C, H04R 1100

Patent

active

043806899

ABSTRACT:
An electroacoustic transducer is disclosed which is small in size so as to allow its use in hearing aids or like structure, but which maintains the performance characteristics of larger transducers. The transducer minimizes its cross-sectional dimensions by aligning the permanent magnet with the soft iron core instead of placing it outside the core. Adjustment of the magnetic flux is provided by a screw trimmer adjustable from the exterior of the transducer.

REFERENCES:
patent: 326675 (1885-09-01), Rogers et al.
patent: 2064426 (1936-12-01), Greibach
patent: 2291942 (1942-08-01), Bagno
patent: 2773941 (1956-12-01), Christiansen
patent: 3324253 (1967-06-01), Uemura et al.
patent: 3573395 (1971-04-01), Whitmore

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