Sound production device, sound-production-device equipped vehicle, and sound production method
US11676569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2022 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | Feb 28, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/17883
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A sound production device includes memories, processors, a rotation speed correlation value acquisition device configured to acquire a rotation speed correlation value of a rotating body, and a speaker. A noise order sound has a characteristic in which a sound pressure of the noise order sound reaches a maximum sound pressure in a first range of the rotation speed correlation value, and the sound pressure becomes smaller than the maximum sound pressure in second ranges adjacent to both sides the first range. When the rotation speed correlation value falls within the first range, the processors do not output a dummy noise. When the rotation speed correlation value falls within either of the second ranges, the processors output the dummy noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.