Head wearable acoustic system with noise canceling microphone geometry apparatuses and methods
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United States of America Patent
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May 28, 2019
Grant Date -
Apr 21, 2016
app pub date -
Oct 18, 2015
filing date -
Jun 25, 2013
priority date (Note) -
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Abstract
Systems and methods are described to extract desired audio from an apparatus that is worn on a user's head. The apparatus includes a head wearable device. A first microphone is positioned on the head wearable device to receive a voice signal from the user A first signal from the first microphone is input as a main channel to a noise cancellation unit. A second microphone is coupled to the head wearable device. A first acoustic distance between the first microphone and the user's mouth is less than a second acoustic distance between the second microphone and the user's mouth when the head wearable device is on the user's head. A second signal from the second microphone is input as a reference channel to the noise cancellation unit. A first signal-to-noise ratio of the first signal is larger than a second signal-to-noise ratio of the second signal.
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