Pistonic motion, large excursion passive radiator
US6176345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Aug 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/207
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A passive radiator assembly for a speaker that substantially reduces diaphragm resonance in the operating frequency range of the device. The new passive radiator assembly includes a quasi-elliptical shaped laminated honeycomb diaphragm, which is damped by an integral outer compliance (suspension) made of an elastomeric material that covers the entire upper surface of the diaphragm. The integrated outer compliance is of a progressive type, having a stiffness that increases in a controlled fashion during large excursions. To prevent non-linear rocking movements and compensate for displacement non-linearities, at least one, and preferably two, opposed spiders supported by a spider assembly frame are used to provide a restoring force applied to the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.