Smart bass reflex loudspeaker
US9615163B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Apr 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2819
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker port may include tunable physical components to tune the port to different frequencies to improve speaker efficiency at those frequencies. The ports may be activated by at least partly opening associated shutters, or disabled by closing the associated shutters. Activated ports may enhance speaker efficiency in a frequency range. However, activated ports may also introduce sound artifacts, thereby reducing sound quality. Therefore, the ports may be disabled when appropriate to reduce their negative impact to sound quality. A Digital Signal Processor (DSP) may determine the frequency components of a played sound to determine when to open the ports and how to tune the ports. Accordingly, a loudspeaker may benefit from the improved efficiency facilitated by the ports while also avoiding typical drawbacks created by the ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.