文档介绍：DELTA Acoustics & Vibration AV 2004/99
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REPORT
DELTA
Acoustics & Vibration
Building 356
Akademivej
DK-2800 Lyngby
Denmark
Tel. (+45) 45 93 12 11
Fax (+45) 45 93 19 90
Comprehensive Model for Sound Propagation – Including
Atmospheric Refraction The report must not
be reproduced,
Client: Nordic Noise Group except in full,
without the written
30th December 1999 approval of DELTA.
DELTA Danish Electronics, Light & Acoustics is an anisation, affiliated to the Danish Academy of Technical Sciences (ATV).
80rap-uk-a
DELTA Acoustics & Vibration AV 2004/99
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Title
Comprehensive Model for Sound Propagation – Including Atmospheric Refraction
Journal no. Project no. Our ref.
AV 2004/99 P 8219 BP/JK/bt
Client
Nordic Noise Group
c/o Environmental and Food Agency of Iceland
. Box 8080
IS-128 Reykjavik
Iceland
Client ref.
Tór Tomasson
Summary
See page 4.
DELTA Acoustics & Vibration, 1999-12-30
Birger Plovsing Jørgen Kragh
DELTA Acoustics & Vibration AV 2004/99
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Contents
Summary.......................................................................................................................... 4
1. Introduction...................................................................................................... 5
2. Air Absorption.................................................................................................. 6
3. Terrain and Screen Effects.............................................................................. 6
Flat Terrain......................................................................................................... 7
Terrain with a Single Screen............................................................................ 11
Two Screens..................................................................................................... 12
Fresnel Zone.................................................