Acoustic actuators
US7620193B2 · kind B2 · utility
6Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2003 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Aug 14, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2440/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustic transducer comprises an active element which changes in length along a first axis in response to an audiofrequency input signal, the element being mounted between an inertial mass and a foot which in use engages a surface whereby audiofrequency vibrations produced by the active element are transmitted to the surface, characterised in that the foot is hingedly connected to the inertial mass and the active element is located between the foot and the mass such that the angle between the first axis and the surface is less than 90°, in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.