Concurrent noise cancelation systems with harmonic filtering
US10553197B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2018 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Oct 16, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/512
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A noise cancellation system with harmonic filtering for a vehicle audio system may include at least one input sensor configured to transmit reference signals, at least one input sensor configured to transmit a narrowband input signal and a broadband input signal, each of the narrowband input signal and broadband input signal including harmonic noise. The system may include a processor being programmed to receive the reference signals, the reference signals including a narrowband reference signal and a broadband reference signal, apply an adaptive filter to each of the reference signals, apply a secondary path to the input signals to generate antinoise signals, sum the antinoise signals broadcast over the secondary path and the primary noise signals to generate an error signal at the output sensor, and apply an adaptive filter to the error signal to remove harmonic noise to prevent cancelation of the harmonic noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.