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Energy-Extraction-Based Active Noise Control System
Category(s):
For Information, Contact:
Jay Bjerke
Commercialization Manager, Engineering
515-294-4740
licensing@iastate.edu
Web Published:
5/8/2015
ISURF #
3045
Summary:
Reduction of noise in vehicles, machinery, buildings or other structures is highly desirable, but difficult to achieve because of the complex physical interactions involved.  ISU researchers have developed an active noise control system with potential applications in a variety of industries, such as aircraft, home appliances, automobiles and machinery

Development Stage:
 
Description:
Suppressing noise in home and work environments, such as in buildings, vehicles, engines, appliances, or machinery, is important for comfort and health reasons.  One approach to active noise control is to use adaptive disturbance cancellation techniques. However, effective noise control is hard to accomplish because analytical models for acoustic-structure interactions are difficult to obtain and significant modeling uncertainties persist.  To overcome these difficulties, ISU researchers in collaboration with NASA scientists have developed an energy-extraction-based active noise control system.  This system is based on passivity theory and uses acoustic sensors and actuators as well as structural sensors and actuators to reduce both acoustic and structural energy.

Advantage:
• Reduces noise generated from both structural and acoustic sources
• Achieves uniform broadband reduction in noise and vibration
Application:
Reduction of noise and vibration in acoustic structures for industries such as aircraft, home appliances, engines, and industrial machinery.

References:
Patent Information:
*To see the full version of the patent(s), follow the link below, then click on "Images" button.
Country Serial No. Patent No. Issued Date
United States 10/731,742 7,623,993* 11/24/2009


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