Apparatus and methods for increasing magnetic field in an...

Details Apparatus and methods for increasing magnetic field in an... Apparatus and methods for increasing magnetic field in an...

2004-06-21

2008-08-26

Tran, Sinh (Department: 2615)

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

C381S079000

Reexamination Certificate

active

07418106

ABSTRACT:
An audio device is provided that is in electrical communication with a magnetic coil for the purpose of increasing magnetic field emissions generated by the device. The magnetic coil may be disposed on a flexible substrate in multi-turn and multi-layer format or disposed on a foldable flexible substrate in multi-turn and multi-layer format. Additionally, the magnetic coil may be disposed on the device's printed circuit board or the coil may be a freestanding, substrate-free coil assembly. The magnetic coil may be placed and secured in various locations within the device to maximize magnetic field emissions and minimize problems related to space limitations. The increased magnetic field results in a device that is hearing-aid compatible as defined by the Federal Communications Commission.

REFERENCES:
patent: 2911605 (1959-11-01), Wales, Jr.
patent: 5360388 (1994-11-01), Spindel et al.
patent: 6108433 (2000-08-01), Norris
patent: 6600399 (2003-07-01), Trandafir
patent: 2002/0136424 (2002-09-01), Usuki et al.
patent: 2003/0003864 (2003-01-01), Locke
patent: 2003/0161482 (2003-08-01), Miller et al.

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