Ultrasonic proximity detector for a telephone device

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

H - Electricity

04

M

H04M 1/00 (2006.01) H04M 1/60 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2356603

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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