Acoustic device
US10506333B2 · kind B2 · utility
4Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2018 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Jul 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2811
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustic device includes a cabinet with a cavity room, a speaker unit mounted in the cavity room of the cabinet, a sealed room formed by the cabinet together with the speaker unit, a predetermined amount of nonpolarity gas which is sealed in the sealed room, a predetermined amount of zeolite absorbent which is sealed in the sealed room and physically absorbing the nonpolarity gas so as to decrease a resonant frequency of the sealed room and increase low frequency resonance of speaker unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.