Numerical simulation of length-limited parametric sound beam

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Hideyuki Nomura, Claes Hedberg, Tomoo Kamakura
Title: Numerical simulation of length-limited parametric sound beam
Conference name: International Congress on Ultrasonics, ICU
Year: 2011
Volume: 1433
Pagination: 547-550
ISBN: 978-073541019-0
ISSN: 0094-243X
Publisher: American Institute of Physics Inc.
City: Gdansk
URI/DOI: 10.1063/1.3703247
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Mathematics & Natural Sciences (Sektionen för ingenjörsvetenskap - Avd.för matematik och naturvetenskap)
School of Engineering S-371 79 Karlskrona
+46 455 38 50 00
Language: English
Abstract: This study proposes a numerical simulation method that predicts nonlinear propagation of ultrasound beams in order to estimate the sound field of parametric array in the time domain. Basically, the method resorts to solving numerically and compactly the governing equations in a compressible viscous fluid using the Yee algorithm finite-difference time domain method. The simulation indicates a narrow audible sound beam which is a feature of the parametric array. Additionally, a length-limited parametric sound beam, which is proposed by Hedberg et al. [C. M. Hedberg et al., Acoust. Phys. 56, 637-639 (2010)], is numerically simulated as a model application. A pair of parametric sound sources generates the length-limited sound beam by control of the amplitudes and initial phases of the sources. The simulation shows a narrow truncated array length-limited sound beam.
Subject: Physical Acoustics\General
Keywords: Length-limited sound beam; Nonlinear sound propagation; Numerical simulation; Parametric array