Determination of equivalent sound speed profiles for ray tracing in near-ground sound propagation

Prospathopoulos, JM; Voutsinas, SG

dc.contributor.author	Prospathopoulos, JM	en
dc.contributor.author	Voutsinas, SG	en
dc.date.accessioned	2014-03-01T01:26:05Z
dc.date.available	2014-03-01T01:26:05Z
dc.date.issued	2007	en
dc.identifier.issn	0001-4966	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17924
dc.subject	Ray Tracing	en
dc.subject.classification	Acoustics	en
dc.subject.other	Acoustic wave propagation	en
dc.subject.other	Atmospheric turbulence	en
dc.subject.other	Computer simulation	en
dc.subject.other	Energy dissipation	en
dc.subject.other	Iterative methods	en
dc.subject.other	Velocity control	en
dc.subject.other	Atmospheric absorption	en
dc.subject.other	Near ground propagation	en
dc.subject.other	Refractive atmosphere	en
dc.subject.other	Ray tracing	en
dc.subject.other	article	en
dc.subject.other	atmosphere	en
dc.subject.other	calculation	en
dc.subject.other	priority journal	en
dc.subject.other	sound	en
dc.subject.other	technique	en
dc.subject.other	wind	en
dc.subject.other	Atmosphere	en
dc.subject.other	Environment	en
dc.subject.other	Models, Statistical	en
dc.subject.other	Models, Theoretical	en
dc.subject.other	Reproducibility of Results	en
dc.subject.other	Sound	en
dc.subject.other	Sound Spectrography	en
dc.subject.other	Wind	en
dc.title	Determination of equivalent sound speed profiles for ray tracing in near-ground sound propagation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1121/1.2764476	en
heal.identifier.secondary	http://dx.doi.org/10.1121/1.2764476	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	The determination of appropriate sound speed profiles in the modeling of near-ground propagation using a ray tracing method is investigated using a ray tracing model which is capable of performing axisymmetric calculations of the sound field around an isolated source. Eigenrays are traced using an iterative procedure which integrates the trajectory equations for each ray launched from the source at a specific direction. The calculation of sound energy losses is made by introducing appropriate coefficients to the equations representing the effect of ground and atmospheric absorption and the interaction with the atmospheric turbulence. The model is validated against analytical and numerical predictions of other methodologies for simple cases, as well as against measurements for nonrefractive atmospheric environments. A systematic investigation for near-ground propagation in downward and upward refractive atmosphere is made using experimental data. Guidelines for the suitable simulation of the wind velocity profile are derived by correlating predictions with measurements. (c) 2007 Acoustical Society of America.	en
heal.publisher	ACOUSTICAL SOC AMER AMER INST PHYSICS	en
heal.journalName	Journal of the Acoustical Society of America	en
dc.identifier.doi	10.1121/1.2764476	en
dc.identifier.isi	ISI:000249321700009	en
dc.identifier.volume	122	en
dc.identifier.issue	3	en
dc.identifier.spage	1391	en
dc.identifier.epage	1403	en