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Acoustic effects of a tree simulated by a FDTD model

Schady, Arthur and Feng, Joseph and Heimann, Dietrich (2012) Acoustic effects of a tree simulated by a FDTD model. EURONOISE 2012, 10-13 June 2012, Prag, Tschechien. ISBN 978-80-01-05013-2. ISSN 2226-5147

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Abstract

Trees and forests as a natural noise barrier would be an eco-friendly solution for noise reduction, as they have additional positive effect for air quality too. To quantify the sound attenuation by trees, the simulation of sound propagation in and around forest areas requires a detailed understanding of the acoustic properties of single trees. Therefore the acoustic effects of different trees are investigated by means of a three-dimensional finite difference time domain (FDTD) sound propagation model within a frequency range from 50 to 1500 Hz. The choice of the model type instantaneously enables the consideration of multiple reflection and diffraction. The influence of trunk size, branch density and the shape of the tree on backscattering and transmission is studied. The spatial resolution in this case is 5 cm. The acoustic properties of real and idealized trees are compared and presented to attain a classification for the typical tree parameters. As earlier studies have shown the main effect results from the diameter of the trunk. Another important parameter is the density of branches within a volume. This is described by the partial volume and the partial cross section. The long-term objective of this study is to gain a new parameterization for a realistic implementation of canopy in sound propagation models.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Acoustic effects of a tree simulated by a FDTD model
Authors:
AuthorsInstitution or Email of Authors
Schady, Arthurarthur.schady@dlr.de
Feng, Josephjoseph.feng@dlr.de
Heimann, DietrichDietrich.Heimann@dlr.de
Date:June 2012
Refereed publication:Yes
In ISI Web of Science:No
Page Range:pp. 1-5
ISSN:2226-5147
ISBN:978-80-01-05013-2
Status:Published
Keywords:Schallausbreitung, Bäume, Simulation
Event Title:EURONOISE 2012
Event Location:Prag, Tschechien
Event Type:international Conference
Event Dates:10-13 June 2012
Organizer:European Acoustics Association
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dr. Arthur Schady
Deposited On:08 Oct 2012 16:02
Last Modified:12 Dec 2013 21:47

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