Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent
1988-03-31
1989-09-26
Ng, Jin F.
Electrical audio signal processing systems and devices
Sound effects
Reverberators
128867, 181135, 381 69, H04R 2502, A61F 1102
Patent
active
048706892
ABSTRACT:
An ear wax barrier for a hearing aid to prevent ear wax from contacting and damaging the internal components of a hearing aid or hearing aid receiver. The barrier includes a housing defining a central axis of passage, as well as a plurality of projections and a variable acoustic attenuator. The projections extend inwardly from the interior surface of the housing, each projection partially occluding the cross-sectional area of the housing. The projection provides a tortuous path for ear wax migrating into the hearing aid. The variable acoustic attenuator and the projections provide a constricted passageway for damping of the acoustic response of the hearing aid.
REFERENCES:
patent: Re26174 (1967-03-01), Leale
patent: 3170046 (1965-02-01), Leale
patent: 3197577 (1965-07-01), Kuklock
patent: 3374318 (1968-03-01), Martin
patent: 3414685 (1968-12-01), Geib et al.
patent: 4447677 (1984-05-01), Miyahra et al.
patent: 4520236 (1985-05-01), Gauthier
patent: 4679650 (1987-07-01), Moser et al.
Beltone Electronics Corporation
Byrd Danita R.
Ng Jin F.
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