Invention Grant
- Patent Title: System and method for secondary path switching for active noise cancellation
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Application No.: US17976048Application Date: 2022-10-28
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Publication No.: US12230241B2Publication Date: 2025-02-18
- Inventor: Sattwik Basu , Kevin J. Bastyr , Jeffrey Charles Tackett , David Trumpy , Geon-Seok Kim , Tao Feng
- Applicant: Harman International Industries, Incorporated
- Applicant Address: US CT Stamford
- Assignee: Harman International Industries, Incorporated
- Current Assignee: Harman International Industries, Incorporated
- Current Assignee Address: US CT Stamford
- Agency: Brooks Kushman P.C.
- Main IPC: G10K11/178
- IPC: G10K11/178

Abstract:
In at least one embodiment, an active noise cancellation (ANC) system is provided. An audio signal source provides an audio signal. At least one loudspeaker projects anti-noise sound within a cabin. At least one microphone provides a first error signal indicative of the noise, the audio signal, and the anti-noise sound and a second error signal indicative of an estimated anti-noise signal. At least one controller is programmed to receive the first error signal and the second error signal and to provide an estimated impulse response based at least on the first error signal and the second error signal. The at least one controller is further programmed to compare the estimated impulse response to one or more pre-stored impulse responses; and to select a first pre-stored impulse response that matches the estimated impulse response to filter one or more reference signals at an adaptive filter to generate the anti-noise signal.
Public/Granted literature
- US20240144905A1 SYSTEM AND METHOD FOR SECONDARY PATH SWITCHING FOR ACTIVE NOISE CANCELLATION Public/Granted day:2024-05-02
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