Invention Grant
US09076427B2 Error-signal content controlled adaptation of secondary and leakage path models in noise-canceling personal audio devices
有权
噪声消除个人音频设备中的次要和泄漏路径模型的错误信号内容控制适应
- Patent Title: Error-signal content controlled adaptation of secondary and leakage path models in noise-canceling personal audio devices
- Patent Title (中): 噪声消除个人音频设备中的次要和泄漏路径模型的错误信号内容控制适应
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Application No.: US13787906Application Date: 2013-03-07
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Publication No.: US09076427B2Publication Date: 2015-07-07
- Inventor: Jeffrey Alderson , Jon D. Hendrix , Yang Lu
- Applicant: Cirrus Logic, Inc.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Mitch Harris, Atty at Law, LLC
- Agent Andrew M. Harris
- Main IPC: A61F11/06
- IPC: A61F11/06 ; G10K11/16 ; G10K11/178
Abstract:
A personal audio device, such as a wireless telephone, generates an anti-noise signal from a microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The microphone measures the ambient environment, but also contains a component due to the transducer acoustic output. An adaptive filter is used to estimate the electro-acoustical path from the noise-canceling circuit through the transducer to the at least one microphone so that source audio can be removed from the microphone signal. A determination of the relative amount of the ambient sounds present in the microphone signal versus the amount of the transducer output of the source audio present in the microphone signal is made to determine whether to update the adaptive response.
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