Loudspeaker for hearing device
US12143769B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2022 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Jul 11, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A wearable loudspeaker includes a magnetic-flux-carrying housing that houses an acoustic sealing structure that separates an interior of the housing into a back volume and a front volume acoustically coupled to a sound port. A first coil is retained in the front volume and comprises a first winding about a corresponding first magnetic core. A second coil is retained in the back volume and comprises a second winding about a corresponding second magnetic core. Opposing surfaces of the first and second magnetic cores have opposite magnetic polarities and produce a magnetic field in a gap between the first and second coils. A magnetic-flux-carrying armature is movably located in the gap and fastened to the acoustic sealing structure. Sound is emitted from the sound port when the armature moves the acoustic sealing structure in the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.