Invention Grant
- Patent Title: Active noise control using bass management
- Patent Title (中): 主动噪音控制采用低音管理
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Application No.: US12240523Application Date: 2008-09-29
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Publication No.: US08559648B2Publication Date: 2013-10-15
- Inventor: Markus Christoph
- Applicant: Markus Christoph
- Applicant Address: DE Karlsbad
- Assignee: Harman Becker Automotive Systems GmbH
- Current Assignee: Harman Becker Automotive Systems GmbH
- Current Assignee Address: DE Karlsbad
- Agency: O'Shea Getz P.C.
- Priority: EP07019092 20070927; EP08001742 20080130
- Main IPC: G10K11/175
- IPC: G10K11/175 ; G10K11/178 ; G10K11/16

Abstract:
An active noise cancellation system reduces, at a listening position, the power of a noise signal being radiated from a noise source to the listening position. The system includes an adaptive filter that receives a reference signal representing the noise signal, and provides a compensation signal. A bass management unit receives the compensation signal and applies a phase shift to the compensation signal to provide a phase shifted compensation signal. A first acoustic radiator receives the phase shifted compensation signal and radiates audio indicative thereof to the listening position. A second acoustic radiator receives the compensation signal and radiates audio indicative thereof to the listening position. The transfer function characteristics from the input of the bass management system to the listening position approximately matches a desired transfer function.
Public/Granted literature
- US20090086990A1 ACTIVE NOISE CONTROL USING BASS MANAGEMENT Public/Granted day:2009-04-02
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