Directional acoustic device and method of manufacturing a directional acoustic device
US10582298B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2016 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Apr 26, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A directional acoustic device with an acoustic source or an acoustic receiver and a conduit to which the acoustic source or acoustic receiver is acoustically coupled and within which acoustic energy travels in a propagation direction from the acoustic source or to the acoustic receiver. The conduit has a radiating portion that has a radiating surface with leak openings that define controlled leaks through which acoustic energy radiated from the source into the conduit can leak to the outside environment or through which acoustic energy in the outside environment can leak into the conduit. The radiating surface has a thin sheet with openings through the sheet, and a cover material with a greater acoustic resistance than an acoustic resistance of an opening. The cover material covers at least parts of at least some of the openings, to define controlled acoustic leaks into or out of the conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.