Scale Model Simulation of Outdoor Sound Propagation Selection of Model Ground Materials PDF Download
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Author: Martin Almgren
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
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Book Description
Author: Martin Almgren
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
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Book Description
Author: Martin Almgren
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Martin Almgren
Publisher:
ISBN:
Category :
Languages : en
Pages : 304
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Book Description
Author: Martin Almgren
Publisher:
ISBN:
Category :
Languages : en
Pages : 98
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Author: Martin Almgren
Publisher:
ISBN:
Category :
Languages : en
Pages : 70
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Author: Martin Almgren
Publisher:
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Category :
Languages : sv
Pages : 142
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Author: Acoustical Society of America
Publisher:
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Category : Acoustical engineering
Languages : en
Pages : 1114
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Author:
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Category :
Languages : en
Pages : 36
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Author: Thomas Rossing
Publisher: Springer Science & Business Media
ISBN: 0387304460
Category : Science
Languages : en
Pages : 1179
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Book Description
This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.
Author:
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Category :
Languages : en
Pages : 17
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Book Description
In complex environments the modelling of outdoor sound propagation implies to take into account the mixed influence of ground characteristics (topography, obstacles, impedance, etc.) and atmospheric conditions (refraction and turbulence). During the last decade significant progress has been made in the modelling of sound propagation over distances ranging from hundreds meters to kilometres, and the agreement between calculated and measured fields has been greatly improved. New developments appear in the parabolic-equation method. In this paper we present a method which evaluates the propagation of an acoustic wave above uneven terrains including realistic meteorological parameters. In our approach the effects of the topography are modelled using appropriate rotated co-ordinates systems in order to treat the non-flat ground as a succession of flat domains. We also examine the influence of scale resolution on numerical simulation of long range sound propagation through the turbulent atmosphere. Currently, we generate the turbulence using a Random Fourier Modes technique, such that the turbulent fluctuation at any point in the medium (either scalar or vectorial in nature) is calculated from the sum of a chosen number of modes. Our model of outdoors sound propagation is validated both with classical numerical benchmark cases and recent outdoor experiments.
