Filter with independently adjustable band gain and break point slopes and method of constructing same
US9722560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2014 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Apr 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S7/307
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A filter for equalizing the frequency response of loudspeaker systems includes at least one band filter section (11) comprised an n-order high boost or cut shelving fitter (13) having a break point frequency, ω1, and an n-order low boost or cut shelving filter (15) having a break point frequency, ω2, wherein ω1<ω2. The order, n, of at least one, and preferably both of the shelving filters of the band filter sections can be selected for adjusting the slope of the shelving filter at one or both of its break point frequencies. The high and low n-order shelving filters forming the band filter sections have substantially the same gain and produce a resultant band gain for the band filter section. Gain correction is provided for the selectable n-order high shelving filter and n-order low shelving filter for correcting the resultant band gain to a base gain level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.