ACTIVE NOISE CANCELLATION METHOD FOR ENCLOSED CABINS
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United States of America Patent
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app pub date -
Feb 17, 2014
filing date -
Feb 15, 2013
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Abandoned
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Abstract
A Noise Cancellation Process for enclosed cabins is disclosed. According to one embodiment, an input audio source corresponding to sound received from multiple microphones situated equidistantly in both directions in a two dimensional plane, is converted to a digital signal via an analog to digital (A/D) convertor. The A/D converted audio is analyzed for content to identify ambient noise. The frequency, amplitude and phase of the identified ambient noise is subsequently determined. A Noise correction sound wave is generated with negative phase of that corresponding to the identified ambient noise. The noise correction sound wave is added to the identified noise to create a noise corrected sound.
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