Noise-Controlling Casings

Noise-Controlling Casings offers a range of feasible noise-controlling strategies for different kinds of devices generating excessive noise. Depending on the required performance and the availability of energy sources, three solution categories are presented: passive (no external energy is needed, but performance is limited), semi-active (little energy is needed, but performance achieves higher values) and active (best performance, but an external energy source is needed). Two very important benefits of these proposed solutions are global noise reduction (in an entire enclosure or the surrounding space) and compact technology (contrary to other active noise control solutions requiring a large number of secondary sources and distributed sensors). Many of the solutions presented are original approaches by the authors, their own developed concepts and new elements and designs that have gained recognition in prestigious journals. The book provides a theoretical background to the research, looking at system configurations, mathematical modelling, signal processing implementation and numerical analysis. The proposed ideas can be applied to any devices provided they have casings of thin walls or they can be enclosed by casings of thin walls. Applications include industrial devices, household appliances, vehicle or aircraft cabins and more. This book will be of interest to professionals and students in the fields of acoustics, vibration, signal processing, control, automotive and aircraft engineering.

1. Introduction 2. Considered types of casings 3. Modelling of casings 4. Passive control 5. Semi-active control 6. Active control systems 7. Summary and conclusions

Marek Pawelczyk is currently a professor at the Silesian University of Technology, Gliwice, Poland. He is president of the International Institute of Acoustics and Vibration, and author of over 200 papers, 3 books and 8 patent applications. His research interests lie in acoustic and vibration signal processing and automation systems. He is recognised internationally for his contributions to the field of control of vibroacoustic processes, mainly active and semi-active vibration and noise control. Stanislaw Wrona is currently at the Silesian University of Technology, Gliwice, Poland. He is assistant editor at the International Journal of Acoustics and Vibration (IJAV) and a journal topic board member at Actuators. His main research interests lie in the field of noise and vibration control methods. His research consists of mathematical modelling, analysis of controllability and observability of vibrating structures, signal processing, optimization and analysis of adaptive control systems. In the field of noise and vibration, he has published 20 articles in JCR journals, 26 papers in peer-reviewed conference materials and several book chapters. He is also co-author of a granted patent and co-author of 6 presently considered patent applications.