Waveguide
US9749735B1 · kind B1 · utility
5Cited by
32References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2016 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Jul 6, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A waveguide for conducting sound that is generated by a loudspeaker that is acoustically coupled to the waveguide. There is a duct with an external wall, an interior opening circumscribed by the wall, and an outlet, and an air-adsorbent structure coupled to an inside of the external wall of the duct such that the air adsorbent structure lines at least a portion of the wall. The apparent volume ratio of the air adsorbent structure is at least about 1.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.