NDLI: A Virtual Microphone Feedback Control System for Active Noise Control

Content Provider	IEEE Xplore Digital Library
Author	Wen-Kung Tseng Ying-Pin Chang
Copyright Year	2006
Description	Author affiliation: Dept. of Electr. Eng., Nankai Inst. of Technol., Nantou (Wen-Kung Tseng)
Abstract	This paper investigates the performance and stability of a virtual microphone feedback controller for local active control of sound through theoretical analysis, simulations and real-time implementation. A novel method to design a stable feedback controller for the local active control system is also presented in this paper. The local active control system is designed to attenuate a broadband disturbance at a point near the listener's ear, i.e. the virtual microphone, rather than at the control microphone, i.e. the physical microphone. The results showed that if a good performance was to be achieved the controller would be unstable. This is because the magnitude of the response of the virtual plant is lower than that of the physical plant. The feedback controller in this work is designed to minimize the noise at the virtual microphone, with a virtual plant response used in the performance objective. However the physical plant is used in the stability constraint. Therefore there is a trade-off between the performance and controller stability
Starting Page	170
Ending Page	175
File Size	6171320
Page Count	6
File Format	PDF
ISBN	0780397126
DOI	10.1109/ICMECH.2006.252518
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-03
Publisher Place	Hungary
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microphones Feedback control Active noise reduction Control systems Adaptive control Acoustic noise Stability analysis Performance analysis Analytical models Design methodology
Content Type	Text
Resource Type	Article

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