Correlated active attenuation system with error and correction signal input
US5206911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1992 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Feb 11, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3049
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active acoustic attenuation system attenuates a correlated input acoustic wave and eliminates the need for an input transducer sensing such wave. An output transducer introduces a canceling acoustic wave to attenuate the input acoustic wave and yield an attenuated output acoustic wave. An error transducer senses the output acoustic wave and provides an error signal. An adaptive filter model has a model input, a model output outputting a correction signal to the output transducer to introduce the canceling acoustic wave and an error input from the error transducer. A summer has a first input from the model output, a second input from the error transducer, and an output outputting a resultant sum to the model input, such that the model input is provided by the sum of the correction signal and the error signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.