Motor vehicle adaptive feed-forward noise reduction
US9177542B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2013 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jan 7, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/511
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A system, device and method that is configured to operate an active noise reduction system for a motor vehicle, where there is an adaptive feed-forward noise reduction system input sine wave at a frequency to be cancelled, and where the adaptive feed-forward noise reduction system includes an adaptive filter that outputs noise reduction signals that are used to drive one or more transducers with their outputs directed to reduce engine noise, and further includes an input transducer with an output signal that is a source of a control signal for the adaptive filter. The output signal of the input transducer is filtered before it reaches the adaptive filter so as to reduce the level of the output signal of the input transducer at one or more frequencies that are close to the frequency of the input sine wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.