Paper Info
Title
Effect of the audio amplifier's distortion on feedforward active noise control.
Abstract
Active noise control (ANC) is an effective method for reducing low-frequency acoustic noise. An anti-noise wave is transmitted by the secondary source to destructively interfere with the noise wave. A quiet zone is thus formed around the error microphone, which provides the error signal in the adaptation process of an ANC controller. However, the real-world performance of an ANC system is often subjected to the distortion incurred in its electronic components. This distortion has been conventionally treated as a trivial part of the secondary path model. When the distortion is severe but the secondary path model is still forced to be linear, the nonlinearity of the true secondary path is no longer negligible and causes degradation in noise reduction performance or even divergence of the ANC controller. This paper revisits the causes of the amplitude distortion in the audio amplifier and how it influences the convergence of the filtered-x least mean square (FxLMS) algorithm in a feedforward ANC system for tonal noise cancellation.
Year
Venue
Field
2017
Asia-Pacific Signal and Information Processing Association Annual Summit and Conference
Noise,Noise reduction,Amplitude distortion,Control theory,Computer science,Audio power amplifier,Phase distortion,Active noise control,Nonlinear distortion,Distortion
DocType
ISSN
Citations 
Conference
2309-9402
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Dong-Yuan Shi102.03
Chuang Shi2196.44
Woon-Seng Gan323054.37