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Acoustic effects of a tree simulated by a FDTD model

Schady, Arthur und Feng, Joseph und 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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Kurzfassung

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.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Acoustic effects of a tree simulated by a FDTD model
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Schady, Arthurarthur.schady@dlr.de
Feng, Josephjoseph.feng@dlr.de
Heimann, DietrichDietrich.Heimann@dlr.de
Datum:Juni 2012
Referierte Publikation:Ja
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-5
ISSN:2226-5147
ISBN:978-80-01-05013-2
Status:veröffentlicht
Stichwörter:Schallausbreitung, Bäume, Simulation
Veranstaltungstitel:EURONOISE 2012
Veranstaltungsort:Prag, Tschechien
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:10-13 June 2012
Veranstalter :European Acoustics Association
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Verkehrssystem
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V VS - Verkehrssystem
DLR - Teilgebiet (Projekt, Vorhaben):V - Verkehrsentwicklung und Umwelt (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Dynamik der Atmosphäre
Hinterlegt von: Dr. Arthur Schady
Hinterlegt am:08 Okt 2012 16:02
Letzte Änderung:12 Dez 2013 21:47

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