Product Description
Active noise control (ANC) is rapidly becoming the most effective way to reduce noises that can otherwise be very difficult and expensive to control. ANC is achieved by introducing a canceling "anti-noise" wave through an appropriate array of secondary sources. When applied accurately, ANC can provide effective solutions to noise-related problems in a broad range of areas, including manufacturing and industrial operations as well as consumer products. Consequently, ANC research and development has become an important focus of both industrial applications and engineering research.

Active Noise Control Systems: Algorithms and DSP Implementations introduces the basic concepts of ANC with an emphasis on digital signal processing (DSP) hardware and adaptive signal processing algorithms, both of which have come into prominence within the last decade. The authors emphasize the practical aspects of ANC systems by combining the principles of adaptive signal processing with both experimental results and practical implementation. Applications are cited in many fields and encompass all types of noise media, including air-acoustic, hydroacoustic, vibrations, and others. The specific implementation stressed is based on the TMS320 family of signal processors from Texas Instruments, which are the most widely used worldwide.

Coverage of theory includes concise derivations and analyses of commonly used adaptive structures and algorithms for active noise control applications, which are enhanced by the inclusion of a floppy disk featuring C and assembly programs for implementing many ANC systems. Mathematical representations are employed and the source code included on the disk is in a form that is easily accessible to anyone using the book.

For practicing engineers, researchers, and advanced students in signal processing, Active Noise Control Systems: Algorithms and DSP Implementations will serve as a comprehensive, state-of-the-art text/reference on this important and rapidly developing field.

The recent development of digital signal processing (DSP) hardware and adaptive signal processing algorithms has resulted in a dynamic new way of achieving active noise control (ANC). To meet the need for a definitive text on both the basic theory and practical applications of these new ANC techniques, Sen M. Kuo and Dennis R. Morgan have written an invaluable, highly accessible book for researchers, engineers, and advanced students in signal processing.

A state-of-the-art presentation of ANC from innovators in the field

Thorough coverage of the theoretical principles behind ANC techniques with rational and consistent notation

Numerous illustrations for easy interpretation of complex algorithms

Unique emphasis on the practical applications of ANC systems from the viewpoint of signal processing and DSP implementation within the framework of ANC systems

Accompanying software that can be used to implement many ANC systems discussed in the text ... Read more

Customer Reviews (4)

Review from signal processing View
This is an excellent book for persons with signal processing background. The book provides only minimum information about acoustics for a signal processing person and does not confuse with too much of details. In this way, the book makes to reader comfortable. Also many aspects of signal processing which can improve the performance of an active noise control (ANC)system are explainedand hence the reader feels more confident that he too can work in this field. This is very much essential as the adaptive algorithms play a crucial role in the ANC implementation. The FXLMS algorithm and its problems are well described. To start with I did not know any thing about ANC, but this book has helped me to get good understanding about it. Presnently, I am able to do research contributions to international journal and to conferences. Further, I have taken up projects at national level in ANC. I feel this book has presented the subject in a simple wayretaining all the intricate details. This background enablesa reseacher even to follow new developments taking place in this filed.This is a very very useful and excellent book.

review from signal processing view
This is an excellent book for the signal processing community as the stress is mainly on algorithms and implementation. A reseacher who wants to work in this field without much background in acoustics, finds this book very useful and it enables him to get to know how he can apply his adaptive signal processing skills to active noise control.This book provides in a simple way the active noise control field and its associated problems. As the book provides only required amount of acoustical details and explains the filtered LMS algorithm very clearly unlike other books, for a beginer it is a very good book. I didn't know any thing aboout ANC when I started, but to day I am able to contribute even to internationaljournals and conferences.Further I have under taken projects at national level from government agencies to develop ANC systems.I feel this book is really well written and it makes the readerkeen to know about the subject and provides him high level of confidence.I sincerely recommend this book for any person who is new to this field and has signal processing background. It is a very very very excellent book.

The best reference for ANC algorithms
This excellent text is written for advanced study and practicing engineers who need to design controllers for active noise control systems. The emphasis is on the algorithms that are usually implemented in a DigitalSignal Processor. The book's treatment of acoustics, sensors, and actuatorsis not as in-depth as texts by Fuller or Nelson. Included in the book is Cand assembly code for the most popular adaptive control techniques, butbeware of bugs and patent issues. One of the algorithms covered in detailis the Filtered-X Least Mean Squares technique that one of the Authors(Morgan) help to make popular in the community.

excellent collection of information
serves as a valuable tool regarding my project on AN ... Read more

Product Description
The prospect of the active control of noise has intrigued, and frustrated, scientists and engineers in many countries for over five decades. The basic idea is relatively simple: to artificially generate a secondary acoustic field that destructively interferes with the field produced by the unwanted sound. However the limitations of the available electronic technology have restricted practical realization to a few simple applications.With the development of flexible and cheap digital signal processing devices, capable of processing signals within the audio range, there has been a resurgence in interest in the theory and practice of developing active noise control systems. Further, the flexibility of these devices allows the developer to concentrate on the design procedure and corresponding control algorithms, rather than the acoustic properties of the arrangements. This book provides an introduction to the design of such systems from the perspective of control engineering.The approach allows the designer to predict the performance of the system in advance and reduces the empirical aspect of many previous approaches. The use of control engineering methods moreover permits the progressive development of various control techniques--from fixed digital control to self-tuning adaptive control--to be realized within a single coherent framework. ... Read more

Product Description
Active Noise and Vibration Control (ANVC) is a modern technology characterized by both high-tech components and an ever-increasing range of applications in disciplines as diverse as civil, mechanical and aeronautical engineering.

This wide-ranging book provides readers with insight into the fundamentals and technology of ANVC, explaining the physical, biological (including psychological) and control principles involved. The author also goes far beyond the basic 1933 definition of Lueg, as he expands the concept to allow for an overwhelming amount of applications. In this way ANVC couples with other areas of physics, and of biology, giving fascinating prospects for the future.

Featuring a review of state-of-the-art practice together with more than 1,000 references, this critical study is designed to convey and encourage creative thinking within the topic. ... Read more

Product Description
Active noise control --- the reduction of noise by generating an acoustic signal that interferes with the noise --- has become a lively area of both basic research and engineering applications. This book provides an introduction to the field suitable for students, academics, acoustical engineers, product developers, and technology enthusiasts. Written for students with no prior knowledge of acoustics or signal processing but with a reasonable grasp of basic physics and mathematics, the book is short and descriptive, explaining how active noise control works, where it could be used, and what results could be reasonably expected. The author emphasizes physical understanding without mathematical detail; the book can thus be used equally well in independent study, in a classroom with laboratories, or in conjunction with a kit for experiment or demonstration. The book covers the fundamental concepts --- basic acoustics, perception of sound, passive noise control, digital systems, adaptive controllers, and active noise control systems --- and then applies them to practical problems and examples, including:- active control of sound in free and enclosed spaces- active control of sound in ducts - digital control systems- adaptive algorithms in active control systems Scott Snyder has been both a consultant and researcher in the field of active noise and vibration control. He has developed active noise control systems for implementations in France, Japan, the USA, and Australia. He lectures in Mechanical Engineering at the University of Adelaide, South Australia, and his current work focuses on implementations of active noise control. ... Read more

Product Description
Written for all those involved in the active control of noise and vibration, both in industry and the academic field, this study breaks new ground in the field. In the first half of the book, the authors explore the fundamental concepts underlying the various sub-disciplines of active noise vibration control. They explain how active control systems can be designed and implemented in practice, and show the pitfalls which must be avoided to ensure a reliable and stable system. They then apply these concepts to practical systems, and among many other subjects discuss in detail the active control of: sound in ducts sound radiation sound transmission into enclosures structural vibration and isolation electronic control system design sensors and actuators This major work is the first to treat the active control of both sound and vibration in a unified way, and describes the state-of-the-art in developments and research. ... Read more

Product Description

Noise and vibration are known to have adverse physiological and psychological effects as well as their deleterious consequences for engineering concerns as disparate as signal quality and ride comfort.

This text shows you how to analyse and design control systems from an engineering perspective. This approach teaches you to predict the performance of a system in advance, reducing the empirical aspects of design. Your skills in dealing with noise and vibration will develop from fixed digital control through self-tuning adaptive control to the incorporation of neural networks and genetic algorithms within a single intelligent control framework. The associated software based on Matlab^®/Simulink^®  and available on-line allows you to simulate noise and vibration patterns in different media and then to realise and assess your own control designs.

An essential study aid for graduate students of systems and control engineering, signal processing, communications, acoustics and vibration.

Product Description
High Quality Content by WIKIPEDIA articles! Noise-cancelling headphones reduce unwanted ambient sounds (i.e., acoustic noise) by means of active noise control (ANC). This involves using one or more microphones placed near the ear, and electronic circuitry which uses the microphone signal to generate an "antinoise" signal. When the antinoise signal is produced by the speaker driver in the headphone, destructive interference cancels out the ambient noise as heard within the enclosed volume of the headphone. Noise cancellation makes it possible to enjoy music without raising the volume excessively. It can also help a passenger sleep in a noisy vehicle such as an airliner. ... Read more

Product Description
Incomplete knowledge of plant or disturbancedynamics complicates the design of a feedbackcontrol system. Uncertainty in plant dynamics cancause feedback instabilities, and uncertainty indisturbance dynamics may deteriorate feedbackperformance. In this monograph, we develop andanalyze methods that can be used tune feedbackcontrollers to overcome these two difficulties. Several algorithms are presented that deal withuncertainty in the disturbance model alone. Time- varying internal models are used to reject time- varying disturbances, and the stability andperformance of the feedback system is carefullyanalyzed. The situation where the disturbance andthe plant models are both uncertain is alsoconsidered, and a new algorithm is developed tocancel the uncertain disturbances while maintainingrobust stability. The algorithm is developed byconsidering simultaneous perturbations to the plantand controller. The plant perturbation is used torepresent the uncertainty in the plant model and thecontroller perturbation is identified with thealgorithm to achieve the performance goals in thepresence of the robustness constraints. ... Read more

Customer Reviews (1)

Well documented!
Book gives a good overview of a new adaptive control methodology for cancellation of (periodic) disturbances with application to Active Noise and Vibration control. The technical content is based on the PhD thesis of Dr. Charles Kinney at the Dept. of MAE, University of California, San Diego. For active noise control applications it is particular interesting as it allows you to get rid off periodic sound components you might encouter in active sound control of cooling fans where the blade pass frequency is creating the periodic sound components. Based on feedback control theory, system identification techniques and adaptation of feedback controllers in the presence of modeling uncertainty, the methodology described in this book allows one to design self adapting feedback control algorithms that can track and control time varying (periodic) disturbances. ... Read more

Product Description
In recent years it has been demonstrated that direct microjet injection into the shear layer of the main jet disrupts the feedback loop inherent in high speed impinging jet flows, thereby significantly reducing the adverse effects. The amount of noise reduced by microjet actuation is known to be dependent on nozzle operating conditions. In this book, two active control strategies using microjets are suggested to maintain a uniform, reliable, and optimal reduction of these tones over the entire range of operating conditions.In order to obtain an optimal performance of the actuator, a two-mode feedback model that captures both the low and high-frequency Rossiter mode was suggested to investigate the role of pulsed microjet in the feedback loop. Due to the fact that a low frequency pulsing brought about additional reduction compared to high frequency pulsing, the presence of low frequency mode is identified. In the context of the analytic model, the effect of pulsing is modeled using a input-shaping controller that accomplishes noise-reduction through a suitable redistribution of the acoustic excitation over the high and low frequencies. ... Read more

Product Description
A new class of smart foams is introduced tosimultaneously control the vibration and noiseradiation from flexible plates coupled with acousticcavities. The proposed smart foam consists of passivefoam/piezoelectric composite layers. The proposedsmart foam can simultaneously control structural andacoustic cavity modes over a broad frequency range. Acomprehensive theoretical study of the smart foamelements is introduced, in order to optimize thedesign and performance of this hybrid actuator. Afinite element model is developed to study theinteractions among the smart foam components and withan acoustic cavity. The developed finite elementmodel is a reduced 2D model, which was compared withthe original 3D model where it managed to capture allthe targeted dynamic characteristics. The developedtheoretical and experimental techniques will provideinvaluable tools for the design and application ofthe proposed smart foam to a wide variety of systemssuch as passenger cars, helicopter, aircraft cabinsand other flexible enclosures, where their operationas quiet platforms is critical to the success oftheir mission. ... Read more