Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1983-11-30
1985-05-28
Isen, Forester W.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
381 69, H04M 104
Patent
active
045202362
ABSTRACT:
An improved in-the-ear hearing aid. The earmold is divided into two separate chambers defined by a divider wall. A first chamber has an opening adjacent the outer ear and the second chamber has an opening adjacent the ear drum. A microphone is positioned adjacent the first chamber opening. An amplifier and a battery for its power source are located within the first chamber. A receiver with a sound emitting aperture is located within the second chamber. The sound emitting aperture is directed toward the divider wall. The receiver is completely surrounded by an acoustic resistance material which separates the receiver from the walls of the chamber. The microphone, amplifier, battery and receiver are electrically interconnected for supplying to the receiver amplified microphone signals. The combination of the dimensions of the chamber and the acoustic material provide a horn effect to the receiver produced sound. The opening of the second chamber may be covered with a removable grill.
REFERENCES:
patent: 3209082 (1965-09-01), McCarrell
patent: 3408461 (1968-10-01), Langford
patent: 3890474 (1975-06-01), Glicksberg
Gilliam Frank D.
Isen Forester W.
Nu-Bar Electronics
Schroeder L. C.
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