Slim profile loudspeaker
US9609405B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Aug 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/403
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A narrow-profile balanced subwoofer or similar speaker includes a number of drivers placed side by side in the same lateral plane, with a first set of drivers facing one direction and second set of drivers facing the opposite direction. Their orientation is such that the sum of the forces from the first set of drivers is equal and opposite the sum of the forces from the second set of drivers, thus cancelling, and the sum of the moments from all of the drivers about a center or pivot point substantially equals zero. The speaker may include three or more drivers, symmetrically or asymmetrically spaced. The drivers may be of the same or different sizes, and the audio signal amplitudes may be adjusted to help balance the speaker. Each set of drivers may output sound into separate sound ducts, which may output sound from one or more apertures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.