Directional horn speaker system
US6055320A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1998 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/288
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A directional speaker system includes an enclosure having an inner surface, an outer surface, an open end, and a closed end, a speaker driver directed toward the open end and mounted near the closed end of the enclosure, an in-line phase plug mounted in front of the speaker driver for manipulating the wavefront of sound waves produced by the speaker driver, and a preferably frustoconical shaped wave guide provided between the speaker driver and the open end of the speaker enclosure. The in-line phase plug preferably has a plurality of channels. The open end of the enclosure is preferably provided with an acoustically absorbent material around its inner perimeter. A second acoustically absorbent material is provided between the speaker driver, the in-line phase plug, and the wave guide, and the speaker enclosure. The in-line phase plug, wave guide phase plug and baffle plate operate to flatten the wavefront.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.