Miniature hearing aid

Details Miniature hearing aid Miniature hearing aid

1986-02-18

1987-06-09

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 686, H04R 2502

Patent

active

046726721

ABSTRACT:
The housing is essentially spherically shaped, formed with a flattened end wall (14), through which a sound receiving opening (42) extends in axial direction, located eccentrically with respect to the spherical housing. A volume control button (50) covers the sound receiving opening, the volume control button being maintained by a small distance (h) spaced from the spherical end wall to permit entry of sound to the sound receiving opening, while preventing masking of the sound receiving opening by the finger of a user, and free entry of contamination thereto. Preferably, the button is connected to the volume control element by an inwardly extending collar (52) which snaps over an adjustment rim (35) on a volume control positioned axially centrally on a printed circuit board (31) secured within the housing and passing through a central opening (47) formed therein. The flat end wall (14) can be formed with additional openings to permit access to adjustment screwdriver heads (36) of trimmer resistors, the additional openings likewise being masked by the volume control button for protection and to prevent contamination.

REFERENCES:
patent: 4532649 (1985-07-01), Bellafiore
patent: 4550227 (1985-10-01), Topholm
patent: 4585089 (1986-04-01), Topholm
patent: 4617429 (1986-10-01), Bellafiore

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