Apparatus having an electroacoustic transducer forming a sound reproducing means and a part of vibration generating means
US6717305B2 · kind B2 · utility
3Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Mar 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K9/13
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In an apparatus (1) having an electroacoustic transducer (12) which includes a magnet system (13) generating a useful magnetic field and a stray magnetic field, a sound generating coil arranged in the useful field to associate with a diaphragm for generating an acoustic sound wave, and at least one movably mounted vibration generating coil (36, 37) arranged in the stray field area of the magnet system (13) for generating vibration perceptible by a user, the vibration generating coil (36, 37) being preferably also connected to a metal part (38) which consists of a soft-magnetic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.