Vehicle approach notification device
US10391935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2017 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Jan 24, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Provided is a vehicle approach notification device that can easily output a warning sound in which a discomfort feeling brought to an occupant is reduced while ensuring a necessary sound pressure. A vehicle approach notification device includes: a sound source; first and second amplifiers; a first speaker system including a first speaker and a second speaker that outputs a sound having an opposite phase to a sound output from the first speaker; and a second speaker system including a third speaker that outputs a sound having a same phase as the sound output from the first speaker and a fourth speaker that outputs a sound having an opposite phase to the sound output from the third speaker, wherein the first speaker system and the second speaker system are disposed so that the first speaker and the third speaker are located closer to a longitudinal center plane of the vehicle than the second speaker and the fourth speaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.