Generating acoustic quiet zone by noise injection techniques
US9995828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2011 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | May 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3215
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A quiet zone generation technique for acoustic/audio signals is proposed for mitigation of selected noise or interferences over limited areas in free space by injecting the very acoustic noise, interference, or audio feedback signals via iterative processing, generating quiet zones dynamically. This creates undesired noise-free quiet zones. Optimization loops operating iteratively to electronically process cancellation signals consist of three interconnected functional blocks: (1) an acoustic injection array, consisting of pick-up arrays to obtain the interference signals, beam forming networks for element weighting and/or re-positioning, and array elements for noise injections, (2) a diagnostic network with strategically located probes, and (3) an optimization processor with cost minimization algorithms to calculate element weights for updating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.