Invention Grant
- Patent Title: Multi-microphone feedforward active noise cancellation
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Application No.: US15780836Application Date: 2016-12-02
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Publication No.: US10403259B2Publication Date: 2019-09-03
- Inventor: Andrew David Unruh
- Applicant: Knowles Electronics, LLC
- Applicant Address: US IL Itasca
- Assignee: Knowles Electronics, LLC
- Current Assignee: Knowles Electronics, LLC
- Current Assignee Address: US IL Itasca
- Agency: Foley & Lardner LLP
- International Application: PCT/US2016/064635 WO 20161202
- International Announcement: WO2017/096174 WO 20170608
- Main IPC: G10K11/178
- IPC: G10K11/178

Abstract:
Systems and methods for active noise cancellation are provided. An example method includes receiving at least two reference signals associated with at least two reference positions. Each of the at least two reference signals includes at least one captured acoustic sound representing an unwanted noise. The reference signals are filtered by individual filters to obtain filtered signals. The filtered signals are combined to obtain a feedforward signal. The feedforward signal is played back to reduce the unwanted noise at a pre-determined space location. The individual filters are determined based on linear combinations of at least two transfer functions. Each of the at least two transfer functions is associated with one of the reference positions. In certain embodiments, the at least two reference signals are captured by at least two feedforward microphones.
Public/Granted literature
- US20180366099A1 MULTI-MICROPHONE FEEDFORWARD ACTIVE NOISE CANCELLATION Public/Granted day:2018-12-20
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