Audio device
US10516929B2 · kind B2 · utility
7Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2018 |
| Grant date | Dec 24, 2019 |
| Priority date | — |
| Expiry date | Oct 3, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A headphone includes an electro-acoustic transducer for creating audio output, the electro-acoustic transducer comprising a transducer magnet that produces a transducer magnetic field having a magnetic field strength, structure that is constructed and arranged to be positioned so as to direct the audio output at the ear canal of the ear of a wearer of the headphone, a magnetic field sensor constructed and arranged to sense the Earth's magnetic field, and a nulling magnet constructed and arranged to produce a nulling magnetic field that reduces the strength of the transducer magnetic field at the magnetic field sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.