Bandpass woofer and method
US5475764A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1994 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Aug 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2849
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A single-vented bandpass woofer loudspeaker system design and method for enabling operation in smaller enclosure volumes with only moderate loss of efficiency. The bandpass system has an enclosure with a partition dividing it into a first sealed chamber and a second chamber having a passive radiating port communicating with air outside the enclosure. A driver is mounted in the partition. Novel, empirically determined tuning ratios which depend upon system variables are defined. By adjusting the system variables to keep the tuning ratios within empirically determined values, a good relationship between flat response, bandwidth and efficiency is achieved. Unexpectedly, using a higher than normal moving mass of the driver leads to an acceptable system with a very small enclosure volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.