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Acoustic effects of trees simulated by a finite-difference time-domain model

Schady, Arthur and Heimann, Dietrich and Feng, Joseph (2014) Acoustic effects of trees simulated by a finite-difference time-domain model. Acta acustica united with Acustica, 100 (6), pp. 1112-1119. Hirtzel. DOI: 10.3813/AAA.918790 ISSN 1610-1928

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Official URL: http://www.acta-acustica-united-with-acustica.com/fileadmin/Dateien/TOC/2014/ActaAcusticaunitedwithAcustica_TOC_V100N6.pdf

Abstract

The simulation of sound propagation in and around forest areas requires a detailed understanding of the acoustic properties of trees. Therefore, the acoustic properties of laser-scanned real trees and idealized trees are studied by means of a three-dimensional finite difference time domain (FDTD) sound propagation model. The aim is to gain functional relationships between backscattered and transmitted sound pressure levels and selected tree characteristics. The choice of the model type enables the simultaneous consideration of multiple reflections and diffraction of sound waves. The spatial resolution of 5 cm admits a frequency range up to 1350 Hz and the resolution of the trunk and major branches. The simulated sound pressure signals are detected by a virtual microphone array in front and behind an infinitely long row of trees, respectively. Regarding the density of tree material within a volume, thin objects reflect less sound energy than dense objects, which in contrast have a noticeable acoustical effect on the transmission loss. The relations are provided by a set of empirical equations.

Item URL in elib:https://elib.dlr.de/49315/
Document Type:Article
Title:Acoustic effects of trees simulated by a finite-difference time-domain model
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schady, ArthurDLR, IPAUNSPECIFIED
Heimann, DietrichDLR, IPAUNSPECIFIED
Feng, JosephDB Sytemtechnik, MünchenUNSPECIFIED
Date:1 November 2014
Journal or Publication Title:Acta acustica united with Acustica
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:100
DOI :10.3813/AAA.918790
Page Range:pp. 1112-1119
Editors:
EditorsEmail
Kergomard, JeanUNSPECIFIED
Publisher:Hirtzel
ISSN:1610-1928
Status:Published
Keywords:Acoustic Effects Trees FDTD Model Simulation
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 II (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Schady, Dr. Arthur
Deposited On:04 Dec 2014 07:49
Last Modified:06 Sep 2019 15:23

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