Acoustic Waves

Acoustic Waves

Author: Don Dissanayake

Publisher: BoD – Books on Demand

Published: 2010-09-28

Total Pages: 480

ISBN-13: 9533071117

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SAW devices are widely used in multitude of device concepts mainly in MEMS and communication electronics. As such, SAW based micro sensors, actuators and communication electronic devices are well known applications of SAW technology. For example, SAW based passive micro sensors are capable of measuring physical properties such as temperature, pressure, variation in chemical properties, and SAW based communication devices perform a range of signal processing functions, such as delay lines, filters, resonators, pulse compressors, and convolvers. In recent decades, SAW based low-powered actuators and microfluidic devices have significantly added a new dimension to SAW technology. This book consists of 20 exciting chapters composed by researchers and engineers active in the field of SAW technology, biomedical and other related engineering disciplines. The topics range from basic SAW theory, materials and phenomena to advanced applications such as sensors actuators, and communication systems. As such, in addition to theoretical analysis and numerical modelling such as Finite Element Modelling (FEM) and Finite Difference Methods (FDM) of SAW devices, SAW based actuators and micro motors, and SAW based micro sensors are some of the exciting applications presented in this book. This collection of up-to-date information and research outcomes on SAW technology will be of great interest, not only to all those working in SAW based technology, but also to many more who stand to benefit from an insight into the rich opportunities that this technology has to offer, especially to develop advanced, low-powered biomedical implants and passive communication devices.


Progress in Underwater Acoustics

Progress in Underwater Acoustics

Author: Harold Merklinger

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 815

ISBN-13: 1461318718

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IMAGE TRACKS AT HALIFAX by L.B. Felsen All living kind much effort spend Some model modes, some model rays, To cope with their environment Some feel that spectra all portrays. Some use their eyes, some use their nose Then there are those who with despatch, To sense where other things repose. Take refuge in the ocean wedge. For one group, nothing's more profound Than to explore the world with sound. If things get messy, randomize. These audio diagnosticians What's partly smooth, determinize. You ponder, is it this or that? Go by the name of acousticians. And wish you were a lowly bat They regularly meet to check Whether their sonogram's on track. The meeting's hosts did treat us well. With images stored in their packs, They let the climate cast its spell. This year they came to Halifax. No weath'ry hope was placed in vain. There they combined with ocean types We were exposed to wind and rain, And each could hear the other's gripes. We glimpsed blue sky through clouds dispersed. A meeting naturally does start But rainy sequence was reversed: Reviewing present state of art. The ocean types would like it wet What we found out is where it's at: Yet they got stuck with sun instead. We cannot hope to match the bat Each confrence has the same refrain: Computer printouts by the reams It has been fun to meet again.


Digital Underwater Acoustic Communications

Digital Underwater Acoustic Communications

Author: Lufen Xu

Publisher: Academic Press

Published: 2016-09-16

Total Pages: 292

ISBN-13: 0128030291

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Digital Underwater Acoustic Communications focuses on describing the differences between underwater acoustic communication channels and radio channels, discusses loss of transmitted sound in underwater acoustic channels, describes digital underwater acoustic communication signal processing, and provides a comprehensive reference to digital underwater acoustic communication equipment. This book is designed to serve as a reference for postgraduate students and practicing engineers involved in the design and analysis of underwater acoustic communications systems as well as for engineers involved in underwater acoustic engineering. - Introduces the basics of underwater acoustics, along with the advanced functionalities needed to achieve reliable communications in underwater environment - Identifies challenges in underwater acoustic channels relative to radio channels, underwater acoustic propagation, and solutions - Shows how multi-path structures can be thought of as time diversity signals - Presents a new, robust signal processing system, and an advanced FH-SS system for multimedia underwater acoustic communications with moderate communication ranges (above 20km) and rates (above 600bps) - Describes the APNFM system for underwater acoustic communication equipment (including both civil and military applications), to be employed in active sonar to improve its performance


Advances in Chinese Spoken Language Processing

Advances in Chinese Spoken Language Processing

Author: Chin-Hui Lee

Publisher: World Scientific

Published: 2007

Total Pages: 564

ISBN-13: 9812772960

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After decades of research activity, Chinese spoken language processing (CSLP) has advanced considerably both in practical technology and theoretical discovery. In this book, the editors provide both an introduction to the field as well as unique research problems with their solutions in various areas of CSLP. The contributions represent pioneering efforts ranging from CSLP principles to technologies and applications, with each chapter encapsulating a single problem and its solutions.A commemorative volume for the 10th anniversary of the international symposium on CSLP in Singapore, this is a valuable reference for established researchers and an excellent introduction for those interested in the area of CSLP.


Suspended Music

Suspended Music

Author: Lothar von Falkenhausen

Publisher: Univ of California Press

Published: 1994-03-16

Total Pages: 518

ISBN-13: 9780520911079

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The Chinese made the world's first bronze chime-bells, which they used to perform ritual music, particularly during the Shang and Zhou dynasties (ca. 1700-221 B.C.). Lothar von Falkenhausen's rich and detailed study reconstructs how the music of these bells—the only Bronze Age instruments that can still be played—may have sounded and how it was conceptualized in theoretical terms. His analysis and discussion of the ritual, political, and technical aspects of this music provide a unique window into ancient Chinese culture. This is the first interdisciplinary perspective on recent archaeological finds that have transformed our understanding of ancient Chinese music. Of great significance to the understanding of Chinese culture in its crucial formative stage, it provides a fresh point of departure for exploring later Asian musical history and offers great possibilities for comparisons with music worldwide.


Theoretical And Computational Acoustics '97

Theoretical And Computational Acoustics '97

Author: Er-chang Shang

Publisher: World Scientific

Published: 1999-05-11

Total Pages: 762

ISBN-13: 9814544906

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This volume is dedicated to Dr Ding Lee for his untiring efforts in promoting the advancement of theoretical and computational acoustics.This proceedings volume provides a forum for active researchers to discuss the state-of-the-art developments and results in theoretical and computational acoustics, covering aero-, seismo- and ocean acoustics and related topics. It discusses multidimensional wave propagation modeling, methods of computational acoustics, wave propagation in rocks, fluid-solid interfaces, nonlinear acoustics, neural networks, real applications and experimental results.


The Oxford Handbook of Laboratory Phonology

The Oxford Handbook of Laboratory Phonology

Author: Abigail C. Cohn

Publisher: Oxford University Press, USA

Published: 2012

Total Pages: 888

ISBN-13: 0199575037

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This book provides state-of-the-art coverage of research in laboratory phonology. Laboratory phonology denotes a research perspective, not a specific theory: it represents a broad community of scholars dedicated to bringing interdisciplinary experimental approaches and methods to bear on how spoken language is structured, learned and used; it draws on a wide range of tools and concepts from cognitive and natural sciences. This book describes the investigative approaches,disciplinary perspectives, and methods deployed in laboratory phonology, and highlights the most promising areas of current research.Part one introduces the history, nature, and aims of laboratory phonology. The remaining four parts cover central issues in research done within this perspective, as well as methodological resources used for investigating these issues. Contributions to this volume address how laboratory phonology approaches have provided insight into human speech and language structure and how theoretical questions and methodologies are intertwined. This Handbook, the first specifically dedicated tothe laboratory phonology approach, builds on the foundation of knowledge amassed in linguistics, speech research and allied disciplines. With the varied interdisciplinary contributions collected, the Handbook advances work in this vibrant field.


Acoustical Imaging

Acoustical Imaging

Author: Yu Wei

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 767

ISBN-13: 1461529581

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The 105 theses contained in this book are selected from those whose authors were present at the 20th International Symposium on Acoustical Imaging. held at Southeast University. Nanjing. China. during September 12-14. 1992. It was the first time that the symposium had been held in China. Our efforts to host the conference goes back to the 15th International Symposium on Acoustical Imaging held in Halifax. Canada. in 1986. We are glad that the 20th symposium has been successfully held at last. We are ardent for the symposium not only because we attach much importance to the field of acoustical imaging. but also because we admire the tradition of the serious academic exploration and friendly cooperation of the scholars attending the symposium. The theses in this book are from 21 countries and those by Mr. G. Wade. Takuso Sato. J. F. Greenleaf. K. J. Langenberg. and Wencai Yang are the specially invited papers. These theses cover such important fields of acoustical imaging as follows: 1. Mathematics and physics of acoustical imaging; 2. Components and industry application; 3. Applications in medicine and biology; 4. Applications in nondestructive testing; 5. Applications in geophysics; 6. Underwater acoustical imaging. All these theses reflect the latest progress in theory and technology. We are very grateful to all the authors who have provided these theses.