In-vehicle speaker
US10462555B2 · kind B2 · utility
2Cited by
0References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2019 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Jan 15, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An opening portion is formed along an outer peripheral edge of a diaphragm in a second casing portion partitioned by the diaphragm. In the opening portion, a plurality of fins is arranged at regular intervals, and an air passage is formed between every adjacent two of the fins. The fin and the air passage are formed so as to be at an angle to a corresponding imaginary line that extends from the vibration center line of the diaphragm in the radial direction. By forming each of the air passages obliquely, noise generated by an air flow due to sound pressure is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.