The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 1998
Filed:
Dec. 19, 1996
Larry Allen Marcus, Hamilton County, IN (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Active noise control for use by individuals using magnetically coupled hearing aids is realized by generating a true representation of the handset input signal, which is employed to drive a separate external field coil. The external field coil is positioned between the handset receiver and the handset acoustic output ports so that it is in close proximity to a user's ear cavity and, hence, to the magnetically coupled hearing aid. Also, in some embodiments of the invention, a magnetic shield is employed between the handset receiver and the external field coil to inhibit the magnetic leakage field from the receiver element from mixing with the magnetic field from the external field coil.