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Accelerometer vector controlled noise cancelling method

  • US 8,868,413 B2
  • Filed: 05/04/2011
  • Issued: 10/21/2014
  • Est. Priority Date: 04/06/2011
  • Status: Expired due to Fees
First Claim
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1. A telecommunication device, comprising:

  • a microphone array comprising a plurality of microphones, wherein each microphone receives an analogue acoustic signal;

    a position sensing device that determines how the telecommunication device is positioned in three-dimensions with respect to a user'"'"'s mouth, wherein the position sensing device is an accelerometer and the accelerometer expresses the determined position as an output having three sub-vectors orthogonal in relation to each other, and a vector resulting from the sub-vectors pointing to the ground;

    at least one analogue/digital converter that converts an output of each microphone into a respective digital signal;

    a digital signal processor that performs signal processing on the digital signals to remove noise from the digital signals, the digital signal processor comprising;

    a controller,a plurality of delay circuits, each delay circuit delaying a respective one of the digital signals in accordance with a respective delay value from the controller, anda plurality of preamplifiers, each preamplifier adjusting gain and frequency response of a respective one of the digital signals in accordance with a respective gain value and a respective frequency response value from the controller,wherein the controller selects each delay, gain, and frequency response value based on the determined position of the telecommunication device.

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