Journal ArticleDOI
The selection and application of an IIR adaptive filter for use in active sound attenuation
TLDR
It is shown that the recursive least mean square (RLMS) algorithm of Feintuch possesses significant advantages for use in a practical active attentuation system.Abstract:
The use of infinite impulse response (IIR) adaptive filters has lagged behind that of finite impulse response (FIR) adaptive filters. This has been due, in part, to the increased complexity of IIR filters and the potential for instability that exists due to the presence of poles in the transfer function. This paper discusses the use of adaptive filters for the active cancellation of acoustic noise. It is shown that IIR filters possess certain characteristics that are highly desirable for this problem. The selection of an appropriate IIR adaptive algorithm is discussed using observability considerations. It is shown that the recursive least mean square (RLMS) algorithm of Feintuch possesses significant advantages for use in a practical active attentuation system. Results are presented from computer simulations as well as an actual system using a TI TMS32010 digital signal processing microprocessor.read more
Citations
More filters
Journal ArticleDOI
Active noise control: a tutorial review
Sen M. Kuo,Dennis R. Morgan +1 more
TL;DR: The basic adaptive algorithm for ANC is developed and analyzed based on single-channel broad-band feedforward control, then modified for narrow-bandFeedforward and adaptive feedback control, which are expanded to multiple-channel cases.
Journal ArticleDOI
Active noise control
TL;DR: The importance of having a clear understanding of the principles behind both the acoustics and the electrical control in order to appreciate the advantages and limitations of active noise control is emphasized.
Journal ArticleDOI
Adaptive Volterra filters for active control of nonlinear noise processes
Li Tan,Jean Jiang +1 more
TL;DR: Numerical simulation results show that the developed VFXLMS algorithm achieves performance improvement over the standard filtered-X LMS algorithm for the following two situations: the reference noise is a nonlinear noise process, and at the same time, the secondary path estimate is of nonminimum phase; and the primary path exhibits the nonlinear behavior.
Journal ArticleDOI
Recent Advances on Active Noise Control: Open Issues and Innovative Applications
TL;DR: Active noise control (ANC) was developed in the early 20th century to help reduce noise as discussed by the authors, but it is still not widely used owing to the effectiveness of control algorithms, and to the physical and economical constraints of practical applications.
Book
Understanding Active Noise Cancellation
TL;DR: 1. Language study and standard English in secondary English teaching, and what it means to be a Reflective Practitioner.
References
More filters
Journal ArticleDOI
Active adaptive sound control in a duct: A computer simulation
TL;DR: In this paper, a digital computer simulation of adaptive closed-loop control for a specific application, sound cancellation in a duct, is presented, which is an extension of Sondhi's adaptive echo canceler and Widrow's adaptive noise canceler from signal processing to control.
Journal ArticleDOI
An adaptive recursive LMS filter
TL;DR: In this paper, an adaptive, recursive, least mean square digital filter is derived that has the computational simplicity of existing transversal adaptive filters, with the additional capability of producing poles in the filter transfer function.
Journal ArticleDOI
Use of random noise for on‐line transducer modeling in an adaptive active attenuation system
L. J. Eriksson,M. C. Allie +1 more
TL;DR: The use of an auxiliary random noise generator for this modeling is described, which is easy to implement, provides continuous on‐line modeling, and has minimal effect on the final value of the error signal.
Journal ArticleDOI
The active control of sound propagation in long ducts
TL;DR: In this article, it is shown that for a circular duct an array consisting of two separated rings of sources, each composed of three point sources, can be made to generate a plane wave output in one direction only, and that such an array of sources will not generate any propagating transverse modes for frequencies below ωu(M) = 2·1 ωc(M).
Patent
Active acoustic attenuator
TL;DR: In this paper, an active attenuator is provided for the attenuation of a relatively broad band of lower frequency vibration such as sound waves from a given source, by the introduction of cancelling vibration having the mirror image amplitude and phase characteritics of the source vibration.