Acoustic device having multiple diaphragms
US10448147B2 · kind B2 · utility
1Cited by
0References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2018 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Dec 7, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R7/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The inside of the housing of an acoustic device, such as an earphone, is divided into two or more spaces based on a driver. Diaphragms are disposed to cover a nozzle communicating with an ear of a user and a vent hole formed in the back of the housing. Optimum sound quality can be secured by adjusting the sizes of the spaces formed by the diaphragms and the housing and the locations where the diaphragms are disposed. When the housing is of a sealed type, low-band sound pressure can be effectively prevented from being lost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.