Low cost controller
US5627746A · kind A · utility
7Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1995 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Mar 1, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/506
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A simple, low cost active noise cancellation system employing a delay and actuator estimator (35), a gain determination (34), a gain (33) and speaker (36) that cancels stationary random noise such as that encountered on a rangehood fan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.