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Sound Radiation of a Line Source with General Time Dependence Moving Above an Interface Between Two Homogeneous Semi-Infinite Fluid Media

Rafael Piscoya

BHT – Berliner Hochschule für Technik, University of Applied Sciences, Berlin, Germany

E-mail Address: piscoya@bht-berlin.de

Corresponding author.

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and

Martin Ochmann

Emeritus – BHT – Berliner Hochschule für Technik, University of Applied Sciences, Berlin, Germany

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https://doi.org/10.1142/S2591728522400035Cited by:2 (Source: Crossref)

This article is part of the issue:

Special Issue on the Occasion of the 30th Anniversary of the Journal of Theoretical and Computational Acoustics
Edited by Michael D. Collins, Steffen Marburg and Andrew N. Norris

Abstract

In this paper, the sound field due to a line source moving above a homogeneous semi-infinite fluid medium emitting an arbitrary time signal is deduced. The source moves with a constant velocity parallel to the flat interface at a fixed height. The expression for the velocity potential is obtained from the impulse response of the stationary line source by including the motion of the source in the source density function. The resulting sound field is expressed in terms of convolution integrals. The correctness of the formulas is verified by comparing them with the results known for the case of a continuous harmonic line source. Two examples, the sound field due to a delta pulse and a Gaussian pulse, are computed and presented. Finally, the relation between the solutions obtained here and the ones obtained when the source moves above an absorbing impedance surface is shown.

Keywords:

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Vol. 30, No. 03

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History

Received 15 April 2022

Revised 5 September 2022

Accepted 8 September 2022

Published: 30 September 2022

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This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 4.0 (CC BY) License which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Sound Radiation of a Line Source with General Time Dependence Moving Above an Interface Between Two Homogeneous Semi-Infinite Fluid Media

Abstract

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