Loudspeaker
US6320972A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Feb 17, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R7/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A special Hi-Fi tweeter having a ring-shaped dome portion with a retracted central portion fixed to the tweeter chassis was found to present an objectionable drop of response in the 18-20 KHz range. According to the invention this problem is eliminated or minimized in placing in front of said central area a forwardly projecting, generally conical wave guide (18) that will minimize interferences between sound waves radiated forwardly and inwardly from the ring shaped dome. An alternative solution is to arrange, in front of a wider central portion, a shield member directly preventing external radiation from the critical central area, still without changing the shape of the diaphragm. However, also certain modifications are proposed, which may well be used in connection with ordinary dome speakers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.