Wide dispersion speaker system and cover mounting structure for instrument directly mounted to flat portion
US7324656B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2003 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Nov 20, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/345
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A wide dispersion speaker system 1 comprises a cone type speaker unit 2, and a restricting element 10A. The restricting element 10A is provided with a center hole 11 at a center section thereof, and a peripheral hole 12 located outward relative to the center hole 11. The restricting element 10A has an annular sound travel inhibiting portion 19 positioned radially outward relative to the center hole 11 and radially inward relative to the peripheral hole 12. An outer end in a radial direction of the sound travel inhibiting portion 19 is positioned at a substantially middle point between an outer end in the radial direction of the center hole 11 and an outer end in the radial direction of the peripheral hole 12 or positioned radially outward relative to the substantially middle point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.