H - Electricity – 04 – M
Patent
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.
Dedieu Stephane
Moquin Philippe
Mitel Knowledge Corporation
Mitel Networks Corporation
Perry + Currier
LandOfFree
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