Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate
2004-07-20
2008-12-02
Ensey, Brian (Department: 2615)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
C381S322000
Reexamination Certificate
active
07460681
ABSTRACT:
Method and apparatus are disclosed for reducing or eliminating the interference produced by a receiver in a listening device, such as a hearing aid. The method and apparatus of the invention involves placing an electrically conductive shield around the receiver. Such a shield helps suppress the electromagnetic signals emitted by the receiver, thereby reducing or eliminating the interference from the receiver. The shield is a passive shield and may be one or more wires that are wound around the receiver and shorted together, or it may be an electrically conductive mesh, jacket, sleeve, or the like, that is placed around the receiver. The shield is then connected either to one of the input terminals of the receiver, or to a system ground of the receiver.
REFERENCES:
patent: 5640457 (1997-06-01), Gnecco et al.
patent: 5740261 (1998-04-01), Loeppert et al.
patent: 6563045 (2003-05-01), Goett et al.
patent: 7003127 (2006-02-01), Sjursen et al.
patent: 7065224 (2006-06-01), Cornelius et al.
patent: 7181035 (2007-02-01), van Halteren et al.
patent: 2002/0061113 (2002-05-01), van Halteren et al.
patent: 2004/0028251 (2004-02-01), Kasztelan et al.
Geschiere Onno
Newton James R.
Nicol Howard
Ensey Brian
Sonion Nederland B.V.
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