Ultrasonic proximity detector for a telephone device

Details Ultrasonic proximity detector for a telephone device Ultrasonic proximity detector for a telephone device

2006-03-07

2006-03-07

Tsang, Fan (Department: 2645)

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

C455S569100

Reexamination Certificate

active

07010098

ABSTRACT:
An ultrasonic proximity detector for a telephone device to detect the proximity of an object thereto includes an ultrasound signal generator generating ultrasound that is broadcast by a speaker of the telephone device. Processing circuitry is coupled to a microphone of the telephone device. The processing circuitry processes broadcast ultrasound that is picked up by the microphone to detect the proximity of an object to the telephone device.

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Canadian Office Action dated Dec. 8, 2004 from corresponding Canadian Application No. 2,356,603.
Canadian Office Action dated Mar. 1, 2004 from corresponding Canadian Application No. 2,356,603.

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