Название: Theoretical and computational acoustics 2003 ISBN: 9812389210 ISBN-13(EAN): 9789812389213 Издательство: World Scientific Publishing Рейтинг: Цена: 12189 р. Наличие на складе: Поставка под заказ.

Описание: The ICTCA conference provides an interdisciplinary forum for active researchers in academia and industry who are of varying backgrounds to discuss the
state-of-the-art developments and results in theoretical and computational acoustics and related topics. The papers presented at the meeting cover acoustical problems of common
interest across disciplines and their accurate mathematical and numerical modeling. This volume collects papers that were presented at the sixth meeting.

The subjects
include geophysics, scattering and diffraction, the parabolic equation (with special sessions in honor of Dr Fred Tappert), seismic exploration, boundary element methods, visualization,
oil industry applications, shallow water acoustics, matched field tracking, bubbles, waves in complex media, seabed interactions, ocean acoustic inversion, and mathematical issues in
underwater acoustics.

Описание: Blind Signal Separation (BSS) deals with recovering (filtered versions of) source signals from an observed mixture thereof. The term `blind' relates to the fact that there are no reference signals for the source signals and also that the mixing system is unknown. This book presents a new method for blind signal separation, which is developed to work on microphone signals. Acoustic Echo Cancellation (AEC) is a well-known technique to suppress the echo that a microphone picks up from a loudspeaker in the same room. Such acoustic feedback occurs for example in hands-free telephony and can lead to a perceived loud tone. For an application such as a voice-controlled television, a stereo AEC is required to suppress the contribution of the stereo loudspeaker setup. A generalized AEC is presented that is suited for multi-channel operation. New algorithms for Blind Signal Separation and multi-channel Acoustic Echo Cancellation are presented. A background is given in array signal processing methods, adaptive filter theory, and fast filtering in the frequency domain. The included CD-ROM can be played using any compact disc player to play the simulation results that are described in the text. When inserted into a computer, it furthermore gives Matlab implementations of the new algorithms along with audio data with which to experiment. This makes the book suited to researchers, engineers, and university students, who want to get acquainted with these emerging fields.

Автор: Taroudakis Michael I., Makrakis George Название: Inverse Problems in Underwater Acoustics ISBN: 0387952489 ISBN-13(EAN): 9780387952482 Издательство: Springer Рейтинг: Цена: 16191 р. Наличие на складе: Поставка под заказ.

Описание: Inverse problems have a long history in acoustics, optics, electromagnetics and geophysics, but only recently have the signals provided by ocean acoustic sensors become numerous and sophisticated enough to allow for realistic identification of the ocean parameters. Acoustic signals propagating for long distances in the water column and reflections of underwater sound from the ocean boundaries provide novel problems of interpretation and inversion. The chapters in this volume discuss some of the contemporary aspects of these problems. They provide recent and useful results for bottom recognition, inverse scattering in acoustic wave guides, and ocean acoustic tomography, as well as a discussion of some of the new algorithms, such as those related to matched-field processing, that have recently been used for inverting experimental data. Each chapter is by a noted expert in the field and represents the state of the art. The chapters have all been edited to provide a uniform format and level of presentation.

Описание: The ICTCA conference provides an interdisciplinary forum for active researchers in academia and industry who are of varying backgrounds to discuss the
state-of-the-art developments and results in theoretical and computational acoustics and related topics. The papers presented at the meeting cover acoustical problems of common
interest across disciplines and their accurate mathematical and numerical modelling. The present book collects papers that were presented at the 4th meeting and printed in "The
Journal of Computational Acoustics".

There are about 120 full research articles on various subjects, such as wave propagation theory and numerical modelling, sound
propagation, vibrations and noise generation, underwater acoustics, engineering seismology, ultrasonic field synthesis and modelling, as well as computational methods, inverse
problems and tomography, shallow water acoustics and environmental/bottom parameter extraction. A CD-Rom is attached that allows readers to browse through articles and print those
of interest to them.

Описание: A study of the mathematical analysis - modelling physical concepts, existence, uniqueness, stability, asymptotics, computational schemes, and so on - involved
in predicting complex mechanical/acoustical behaviour/response and identifying or optimizing mechanical/acoustical systems giving rise to phenomena that are either observed or
aimed at. The forward problems consist in solving generally coupled, nonlinear systems of integral or partial (integer or fractional) differential equations with nonconstant coefficients. The
identification/optimization of the latter, of the driving terms and/or of the boundary conditions, all of which are often affected by random perturbations, forms the class of related inverse
or control problems.

Автор: M. S. Howe Название: Acoustics of Fluid-Structure Interactions ISBN: 0521054281 ISBN-13(EAN): 9780521054287 Издательство: Cambridge Academ Рейтинг: Цена: 7805 р. Наличие на складе: Поставка под заказ.

Описание: Acoustics of Fluid-Structure Interactions addresses an increasingly important branch of fluid mechanics - the absorption of noise and vibration by fluid flow. This subject, which offers numerous challenges to conventional areas of acoustics, is of growing concern in places where the environment is adversely affected by sound. Howe presents useful background material on fluid mechanics and the elementary concepts of classical acoustics and structural vibrations. Using examples, many of which include complete worked solutions, he vividly illustrates the theoretical concepts involved. He provides the basis for all calculations necessary for the determination of sound generation by aircraft, ships, general ventilation and combustion systems, as well as musical instruments. Both a graduate textbook and a reference for researchers, Acoustics of Fluid-Structure Interactions is an important synthesis of information in this field. It will also aid engineers in the theory and practice of noise control.

Автор: Enflo B.O., Hedberg C.M. Название: Theory of Nonlinear Acoustics in Fluids ISBN: 1402005725 ISBN-13(EAN): 9781402005725 Издательство: Springer Рейтинг: Цена: 17270 р. Наличие на складе: Поставка под заказ.

Описание: This book presents theoretical nonlinear acoustics in fluids with equal stress on physical foundations and mathematical methods. From first principles in fluid mechanics and thermodynamics a universal mathematical model (Kuznetsov's equation) of nonlinear acoustics is developed. This model is applied to problems such as nonlinear generation of higher harmonics and combination frequencies, the shockwave from a supersonic projectile, propagation of shocks in acoustic beams and nonlinear standing waves in resonators.Special for the book is the coherent account of nonlinear acoustic theory from a unified point of view and the detailed presentations of the mathematical techniques for solving the nonlinear acoustic model equations. The book differs from mathematical books on nonlinear wave equations by its stress on their origin in physical principles and their use for physical applications. It differs from books on applications of nonlinear acoustics by its ambition to explain all steps in mathematical derivations of physical results. It is useful for practicians and researchers in acoustics feeling the need for more theoretical understanding. It can be used as a textbook for graduate or advanced undergraduate students with an adequate background in physics and mathematical analysis, specializing in acoustics, mechanics or applied mathematics.

Автор: Salomons E.M. Название: Computational Atmospheric Acoustics ISBN: 1402003900 ISBN-13(EAN): 9781402003905 Издательство: Springer Цена: 10793 р. Наличие на складе: Поставка под заказ.

Описание: Noise from cars, trains, and aeroplanes can be heard at large distances from the source. Accurate predictions of the loudness of the noise require accurate computations of sound propagation in the atmosphere. This book describes models that can be used for these computations. The models take into account complex effects of the atmosphere and the ground surface on sound waves, including the effects of wind and temperature distributions, atmospheric turbulence, irregular terrain, and noise barriers. The main text of the book focuses on physical effects in atmospheric acoustics. The effects are illustrated by many numerical examples. The main text requires a very limited mathematical background from the reader; detailed mathematical descriptions of the models, developed from the basic principles of acoustics, are presented in appendices. Models for moving media are compared with models that are based on the effective sound speed approach. Both two-dimensional models and three-dimensional models are presented. As meteorological effects play an important role in atmospheric acoustics, selected topics from boundary layer meteorology and the theory of turbulence are also presented.

Описание: An illustrated guide to 100 important concert halls and opera houses. It examines their architecture and engineering and discusses their acoustical quality as judged by conductors and music critics. It includes photographs and architectural drawings together with acoustical data on the halls.

Автор: Lurton Xavier Название: Underwater Acoustics / An Introduction ISBN: 3540429670 ISBN-13(EAN): 9783540429678 Издательство: Springer Рейтинг: Цена: 16164 р. Наличие на складе: Поставка под заказ.

Описание: Presents the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target backscattering and noise. This book covers the features of sonar systems, transducers and arrays, signal processing and performance evaluation. It provides an overview of applications, presenting the working principles of various systems.

Автор: Blauert Jens Название: Communication Acoustics ISBN: 354022162X ISBN-13(EAN): 9783540221623 Издательство: Springer Рейтинг: Цена: 18349 р. Наличие на складе: Поставка под заказ.

Описание: Communication Acoustics deals with the fundamentals of those areas of acoustics which are related to modern communication technologies. Due to the advent of digital signal processing and recording in acoustics, these areas have enjoyed an enormous upswing during the last 4 decades. The book chapters represent review articles covering the most relevant areas of the field. They are written with the goal of providing students with comprehensive introductions. Further they offer a supply of numerous references to the relevant literature. Besides its usefulness as a textbook, this will make the book a source of valuable information for those who want to improve or refresh their knowledge in the field of communication acoustics вЂ“ and to work their way deeper into it. Due to its interdisciplinary character Communication Acoustics is bound to attract readers from many different areas, such as: acoustics, cognitive science, speech science, and communication technology.

Автор: Bucur Voichita Название: Urban Forest Acoustics ISBN: 3540307834 ISBN-13(EAN): 9783540307839 Издательство: Springer Рейтинг: Цена: 15111 р. Наличие на складе: Поставка под заказ.

Описание: Trees can reduce noise by sound reflection and absorption. Investigating noise control in urban environments, Voichita Bucur's new book Urban Forest Acoustics covers the following topics:- dendrological characteristics of trees- factors affecting sound propagation in forest belts- equipment for in situ noise measurements- acoustical sensors for the measurement of tree characteristics- noise attenuation in situ due to the ground and scattering by trees, trunks, foliage, branches- protection against traffic noise from highways, railways, aircraft- relations between urban noise and trees, birds, and insects- fire control- economic aspects related to the value of urban trees.The book is of particular interest to those concerned with environmental management, noise control, and urban forestry. It is an invaluable source of information for environmental managers, foresters, acousticians, engineers, architects, scientists, and students.

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