Noise reduction device
US10157605B2 · kind B2 · utility
0Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2016 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Dec 16, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A noise reduction device is used together with a shell which surrounds at least a part of the periphery of reclinable seat. The device includes a plurality of noise microphones, a noise controller, and control speakers. Control speakers output a sound based on a control-sound signal that is generated by the noise controller. Each of noise microphones is accommodated in back wall configuring the shell and is set back from a surface of the back wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.