Wide-band loudspeaker having a diaphragm area divided into sub-areas for various frequency ranges
US4821330A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1987 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Jan 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a wide-band loudspeaker in which the overall diaphragm is divided into an inner and an outer diaphragm sub-area. The inner diaphragm sub-area preferably consists of a dome-shaped cover of the moving-coil support. The outer diaphragm sub-area can be formed as a cone or NAWI diaphragm or as a shaped or moulded body, the shaped body having an at least approximately planar front face and its rear boundary face having the form of a cone or NAWI diaphragm. The outer diaphragm sub-area is connected to the moving-coil support by a frequency-dependent yieldable connection with high damping which at high audiofrequencies practically decouples the outer diaphragm sub-area from the moving-coil support but at low audiofrequencies acts like a rigid connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.