Automatic calibration of an ambient noise compensation system
US11329622B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Apr 21, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Aug 16, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R27/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An element of an automatic gain control system that automatically calibrates a Composite Gain vs Ambient Noise look-up table responsive to user zone gain inputs at various ambient noise levels. The table is a graph of adjacent (horizontally or diagonally) data points (nodes) mapping ambient noise to composite gain. Three algorithmic rules determine position changes of the nodes responsive to zone gain inputs. A curve may be fit to an arrangement of adjacent nodes. The curve, or the interpolated table value, is used with an ambient noise input to determine the current composite gain. The element may be used with many traditional ANC systems. Once calibrated over the full range of ambient noises in the user's space, the ANC system may never need further user zone gain inputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.