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US 2009/0268931 A1Published application
Headset with integrated stereo array microphone
AssigneeAndrea Electronics Corporation
InventorsDouglas ANDREA, Qunsheng Liu, John Probst
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Abstract
The invention relates to a noise canceling audio transmitting/receiving device; a stereo headset with an integrated array of microphones utilizing an adaptive beam forming algorithm. The invention also relates to a method of using an adaptive beam forming algorithm that may be incorporated into a stereo headset. The sensor array used herein has adaptive filtering capabilities.
Claims9
A noise canceling audio transmitting/receiving device, said device comprising:
- at least one audio outputting means;
- and
- at least one audio receiving means, each for receiving an acoustic signal and outputting an electrical signal representing the received acoustic signal;
- wherein each of said receiving means is directly mounted on a surface of a corresponding outputting means and
- processing means connected to the audio receiving means and operable to apply a frequency domain adaptive filter to the electrical signal output by the audio receiving means, said processing means operable to carry out processing comprising:
- applying an averaging filter on the digitized electrical signal output by each of the receiving means,
- continuously calculating a beam, a beam reference, a reference average, and noise estimation based on the output of the averaging filter to continuously update filter coefficients of the adaptive filter, and
- selectively applying the adaptive filter to the output of the averaging filter.
5 more elements
Dependencies are inferred from the claim text.