Communication using audible tones

Details Communication using audible tones Communication using audible tones

2003-01-30

2008-03-25

Burd, Kevin (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C713S182000

Reexamination Certificate

active

07349481

ABSTRACT:
An apparatus and method for communication using sound waves is disclosed. More particularly, orthogonal frequency division multiplexing scheme is used to transmit and receive digital data on sound waves. In one embodiment, the sound waves are used to exchange information. In another aspect, the sound waves are used to authenticate an individual or device.

REFERENCES:
patent: 6130859 (2000-10-01), Sonnenschein et al.
patent: 6607136 (2003-08-01), Atsmon et al.
patent: 6768778 (2004-07-01), Chen et al.
patent: 2001/0055352 (2001-12-01), Bannasch et al.
patent: 2002/0154772 (2002-10-01), Morishita et al.
patent: 2002/0191765 (2002-12-01), Labaton
patent: 2003/0026197 (2003-02-01), Crawford

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