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Computational Atmospheric Acoustics

ISBN-10: 1402003900

ISBN-13: 9781402003905

Edition: 2001

Authors: Erik M. Salomons

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Description:

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.
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Book details

Copyright year: 2001
Publisher: Springer
Publication date: 11/30/2001
Binding: Paperback
Pages: 335
Size: 6.25" wide x 9.25" long x 0.75" tall
Weight: 1.100
Language: English

preface
Introduction
Unbounded homogeneous atmosphere
Homogeneous atmosphere above a ground surface
Atmospheric refraction
Atmospheric turbulence
Irregular terrain
Noise barriers
Basic acoustic equations for a homogeneous atmosphere
Free field of a point source
Acoustic impedance
Reflection of sound waves
Basic acoustic equations for a layered refracting atmosphere
Generalized Fast Field Program (FFP)
Parabolic Equation (PE) method
Green's Function Parabolic Equation (GFPE) method
Atmospheric turbulence
Atmospheric turbulence in the PE method
Analytical model for a non-refracting turbulent atmosphere
Ray model including caustic diffraction fields
Computational methods for irregular terrain
Wind and temperature profiles in the atmosphere
Sound propagation over a screen
The method of stationary phase
References
List of symbols
Index