Electroacoustic drivers and loudspeakers containing same
US12003941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2023 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | Feb 21, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Electroacoustic drivers that can be utilized in loudspeaker systems that utilize drivers having a magnetic negative spring (MNS) (such as reluctance assist drivers (RAD) and permanent magnet crown (PMC) drivers). The electroacoustic drivers can be used at all audio frequencies, including subwoofer frequencies. The magnetic negative springs of the electroacoustic drivers can cancel, or partially cancel, the large pressure forces on a sound panel (of an audio speaker) so that substantial subwoofer notes can be efficiently and cost effectively produced in small/portable speakers. The electroacoustic drivers can include a stabilizing/centering mechanism to overcome the destabilizing forces of a MNS that are too large for a voice coil alone to produce.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.