Noise reduction device, vehicle, noise reduction system, and noise reduction method
US11276385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2020 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Jul 15, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3221
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
With respect to a noise reduction device using a speaker and a microphone corresponding to each seat in a vehicle to reduce a noise in each seat, the noise reduction device includes, a signal processing unit configured to generate a canceling sound that reduces a noise at an ear of an occupant in a predetermined seat by using an auxiliary filter, an operation setting unit configured to disable operations of a speaker and a microphone corresponding to each empty seat in the vehicle, and an auxiliary filter setting unit configured to change a setting value of the auxiliary filter used by the signal processing unit to generate the canceling sound in accordance with the number of occupants in seats other than the predetermined seat, the seats affecting the noise in the predetermined seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.