Invention Application
WO2015026568A1 INSTABILITY DETECTION AND CORRECTION IN SINUSOIDAL ACTIVE NOISE REDUCTION SYSTEMS
审中-公开
SINUSOIDAL主动噪声减少系统的不稳定性检测与校正
- Patent Title: INSTABILITY DETECTION AND CORRECTION IN SINUSOIDAL ACTIVE NOISE REDUCTION SYSTEMS
- Patent Title (中): SINUSOIDAL主动噪声减少系统的不稳定性检测与校正
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Application No.: PCT/US2014/050682Application Date: 2014-08-12
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Publication No.: WO2015026568A1Publication Date: 2015-02-26
- Inventor: GANESHKUMAR, Alaganandan
- Applicant: BOSE CORPORATION
- Applicant Address: The Mountain, MS 3B1 Framingham, Massachusetts 01701-9168 US
- Assignee: BOSE CORPORATION
- Current Assignee: BOSE CORPORATION
- Current Assignee Address: The Mountain, MS 3B1 Framingham, Massachusetts 01701-9168 US
- Agency: BRYAN, Timothy M.
- Priority: US13/973,472 20130822
- Main IPC: G10K11/178
- IPC: G10K11/178
Abstract:
A method for operating an active noise reduction system that is designed to reduce the harmonic or sinusoidal noise emanating from a rotating device, where there is an active noise reduction system input signal that is related to the frequency of the noise to be reduced, and where the active noise reduction system comprises one or more adaptive filters that output a generally sinusoidal noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce the noise. Distortions of the noise reduction signal are detected. A distortion is based at least in part on differences between the frequency of the noise reduction signal and the frequency of the harmonic noise. The noise reduction signal is altered based on the detected distortion.
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