Sound-absorbing material and speaker using same
US11863932B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2021 |
| Grant date | Jan 2, 2024 |
| Priority date | — |
| Expiry date | Jan 19, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a sound-absorbing material, including a metal-organic framework material having a microporous structure. The metal-organic framework material includes a coordinated metal M and organic framework materials (OFs) coordinated with the coordinated metal. The microporous structure includes a plurality of uniformly distributed micropores, and a diameter of each of the plurality of micropores is within a range of 0.3 nm to 1.2 nm. The sound absorbing material including the metal-organic framework material can be added into a speaker to increase the acoustic compliance of air in a rear cavity of the speaker, thereby improving the performance of the speaker in a low frequency range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.