Loudspeaker cabinet
US4398619A · kind A · utility
Inventor
Key dates
| Filing date | Mar 31, 1982 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Mar 31, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2819
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker cabinet comprising front, back, top, bottom and side panels, a speaker drive unit positioned on an upper portion of the front panel, first and second spaced apart sound wave reflector panels positioned below the speaker unit and extending from the front panel towards the rear panel but not engaging the rear panel, a first sound wave pressure relief area defined by the rear panel and the end of the first reflector panel adjacent the rear panel, a second sound wave pressure relief area defined by the rear panel and the end of the second reflector panel adjacent the rear panel, and a third sound wave pressure relief area constituted by a relief aperture which is positioned below the second reflector panel and in the front panel, the loudspeaker cabinet being such that the first and the second reflector panels divide the interior of the loudspeaker cabinet into first, second and third compartments with the speaker drive unit being positioned in the first compartment whereby sound waves from the speaker drive unit are reflected between the first reflector panel and the top panel before passing through the first relief area, and whereby the sound waves are then reflected be…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.