Active attenuation system with increased dynamic range
CA 1278751 C · Owner: Bailey, Geoffrey S. · Inventors: Allie, Mark C.; Bailey, Geoffrey S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An active acoustic attenuation system is provided that increases dynamic range by adjusting the amplitude of the input signal and the error signal at respective model and error inputs and, providing automatic self-calibration. Input and error transducers provide analog input and error signals which are converted by an analog to digital converter to digital input and error signals for input to the model . Digital to analog converters have digital inputs from respective digital input and error signals and operate in an analog to analog mode with analog inputs from respective input and error transducers and analog outputs to the analog to digital converter . Dynamic range is also increased by …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.