MICROPHONE PROXIMITY DETECTION
First Claim
1. A method for operating a mobile telephony device, comprising:
- monitoring during a call a frequency response of a handset receiver of the mobile device over a frequency band;
maintaining the mobile device in one operating mode, while the frequency response over the frequency band is on one side of a predetermined threshold value; and
switching the mobile device from said one operating mode to a different operating mode automatically, when the frequency response over the frequency band goes to another side of the predetermined threshold value.
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Accused Products
Abstract
A mobile communications device contains at least two microphones. One microphone is located away from the handset receiver and serves to pick up voice of a near end user of the device for transmission to the other party during a call. Another microphone is located near the handset receiver and serves to pick up acoustic output of the handset receiver (a far end signal). A signal processor measures the frequency response of the receiver. The signal processor performs spectral analysis of the receiver frequency response to determine whether or not the device is being held at the ear of the user. On that basis, the device automatically changes its operating mode, e.g., turns on or off a touch sensitive display screen during the call. Other embodiments are also described.
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Citations
9 Claims
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1. A method for operating a mobile telephony device, comprising:
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monitoring during a call a frequency response of a handset receiver of the mobile device over a frequency band; maintaining the mobile device in one operating mode, while the frequency response over the frequency band is on one side of a predetermined threshold value; and switching the mobile device from said one operating mode to a different operating mode automatically, when the frequency response over the frequency band goes to another side of the predetermined threshold value. - View Dependent Claims (2, 3, 4)
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5. A machine-implemented method comprising;
- measuring acoustic output of a speakerphone speaker in a mobile device during a call;
determining a proximity of an object to the mobile device based on the measured acoustic output;
maintaining speakerphone mode of the mobile device during the call when the proximity indicates far; and
switching the mobile device from the speakerphone mode to handset mode automatically when the proximity indicates near. - View Dependent Claims (6, 7, 8, 9)
- measuring acoustic output of a speakerphone speaker in a mobile device during a call;
Specification