Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate
2006-02-21
2006-02-21
Le, Huyen (Department: 2646)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
C381S328000, C381S324000
Reexamination Certificate
active
07003127
ABSTRACT:
A disposable-type hearing aid uses a relatively large single diaphragm or a large single diaphragm subdivided into a plurality of smaller active diaphragm areas obtained using a grate-like back support plate with ridges which contact and divide the diaphragm into the several smaller active diaphragm areas. The diaphragm and a backplate are enclosed in a metal housing and are disposed proximal and parallel to a shell-like hearing aid enclosure having sound inlets. The metal housing is closed at an end opposite the sound inlets by a printed circuit board (PCB) forming an acoustical seal for a back volume of the microphone. The PCB also carries substantially all the electronic components for the hearing aid thereon. The PCB has a ground plane in contact with the housing whereby the PCB also acts as an EMI shield. An electrical connection is formed in various ways between the back support plate and the PCB during assembly of the metal housing and components with the PCB. Mass production of disposable hearing aids with large diaphragms and relatively low noise levels is thus possible using this invention.
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Aceti John G.
Fritz Frederick J.
Mahoney Derek D.
Margicin John M.
Palanisamy Ponnusamy
Hamilton Brook Smith & Reynolds P.C.
Le Huyen
Nguyen Tuan Duc
Sarnoff Corporation
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