Battery pack with audio coil

Details Battery pack with audio coil Battery pack with audio coil

1996-11-27

1999-11-23

Wolfe, Willis R.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Remote control, wireless, or alarm

381322, 381331, 379 52, 455 90, H04B 100, H04R 2504

Patent

active

059914203

ABSTRACT:
A battery pack is provided for use with a mobile phone. The battery pack includes audio signal power amplifier circuitry with an inductive coil. The inductive coil boosts the magnetic field strength of the audio signal received by the phone, so that a tele-coil circuit for a hearing aid can be used to pick up the audio signal received by the phone. Consequently, the picked up audio signal can be discerned from the magnetic noise created by the phone. Also, the use of the battery coil allows a tele-coil pick up of the audio signal even if the phone has a speaker that does not generate an appreciable magnetic field.

REFERENCES:
patent: 2530621 (1950-11-01), Lybarger
patent: 3396245 (1968-08-01), Flygstad
patent: 3668334 (1972-06-01), Schwake
patent: 3742359 (1973-06-01), Behymer
patent: 4160122 (1979-07-01), Jacobson
patent: 4543453 (1985-09-01), Brander
patent: 4596899 (1986-06-01), Wojcik et al.
patent: 5537472 (1996-07-01), Estevez-Alcolado et al.
patent: 5796821 (1998-08-01), Crouch et al.

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