Results 221 to 230 of about 244,733 (264)
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The Journal of the Acoustical Society of America, 1995
The control of noise emanating from engines and their exhaust systems is a difficult problem to overcome in a cost effective way. The noise may be reduced by the introduction of a fluid into the exhaust system such that the fluid is heated and expands rapidly producing sound and vibration which is in antiphase to the noise and vibration produced by the
Martin J. Moody, Alan V. Yorke
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The control of noise emanating from engines and their exhaust systems is a difficult problem to overcome in a cost effective way. The noise may be reduced by the introduction of a fluid into the exhaust system such that the fluid is heated and expands rapidly producing sound and vibration which is in antiphase to the noise and vibration produced by the
Martin J. Moody, Alan V. Yorke
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Active Control Of Structure-Borne Noise
Journal of Sound and Vibration, 1994Abstract The successful practical application of active noise control requires an understanding of both its acoustic limitations and the limitations of the electrical control strategy used. This paper is concerned with the active control of sound in enclosures. First, a review is presented of the fundamental physical limitations of using loudspeakers
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The Journal of the Acoustical Society of America, 1992
An active noise control system for controlling noise propagated through a duct comprises a first microphone located to receive the propagated noise at a point in a plane perpendicular to the length of the duct. A loudspeaker is located substantially at that plane for introducing sound into the duct.
John W. Edwards, Nicolaas M. J. Dekker
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An active noise control system for controlling noise propagated through a duct comprises a first microphone located to receive the propagated noise at a point in a plane perpendicular to the length of the duct. A loudspeaker is located substantially at that plane for introducing sound into the duct.
John W. Edwards, Nicolaas M. J. Dekker
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Active noise control of transformer noise
Proceedings of EMPD '98. 1998 International Conference on Energy Management and Power Delivery (Cat. No.98EX137), 2002Acoustic noise generated by transformers is a serious form of environmental pollution and it affects people's lives. Different methods have been suggested to reduce this form of pollution. This paper describes the implementation of a DSP based active noise control (ANC) system. Based on the theoretical result, different noise control systems were built
C. Teoh +4 more
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A Modern Control Approach to Active Noise Control
Journal of Dynamic Systems, Measurement, and Control, 1993Active noise control systems currently in use and/or described in the research literature are typically based on adaptive signal processing theory or, equivalently, adaptive feedforward control theory. This paper presents a modern control approach to the problem of active noise cancellation in a three-dimensional space. The controller is designed based
Shoureshi, R. +3 more
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The Journal of the Acoustical Society of America, 1997
A system for reducing noise of a noise generator such as a fan located in a housing includes a short duct (118) directing air to the fan housing. An input transducer (17) is located in the duct (118) at a position further removed from the fan than cancellation device (18) which is also located in the duct (118).
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A system for reducing noise of a noise generator such as a fan located in a housing includes a short duct (118) directing air to the fan housing. An input transducer (17) is located in the duct (118) at a position further removed from the fan than cancellation device (18) which is also located in the duct (118).
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2003
The present work presents the main results of a numerical and experimental activity devoted to an active skin panel design and testing on a laboratory specimen. This applications represent the natural development of those performed at the Department during the last eight years of research activities in the active noise and vibration control field ...
VISCARDI, MASSIMO, LECCE, LEONARDO
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The present work presents the main results of a numerical and experimental activity devoted to an active skin panel design and testing on a laboratory specimen. This applications represent the natural development of those performed at the Department during the last eight years of research activities in the active noise and vibration control field ...
VISCARDI, MASSIMO, LECCE, LEONARDO
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A delayless subband active noise control system for wideband noise control
IEEE Transactions on Speech and Audio Processing, 2001In this paper, we present an efficient noise control algorithm based on the delayless subband adaptive filter. The algorithm reduces the computational complexity of the delayless subband filter by decomposing the secondary path response into a set of subband functions.
Seon Joon Park +3 more
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Active noise control: a tutorial review
Proceedings of the IEEE, 1999Active noise control (ANC) is achieved by introducing a cancelling "antinoise" wave through an appropriate array of secondary sources. These secondary sources are interconnected through an electronic system using a specific signal processing algorithm for the particular cancellation scheme.
Sen M. Kuo, Dennis R. Morgan
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Active Noise Control in Three Dimensions
IEEE Transactions on Control Systems Technology, 2014Available acoustical signal processing algorithms for active noise control (ANC) can only attenuate noise at a finite number of points. Accordingly, they are unable to create continuous quiet zones in 3-D space. This paper proposes a methodology for developing a family of acoustical signal processing algorithms that are able to control sound in three ...
Iman Tabatabaei Ardekani +1 more
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