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

Author:

Piscoya Rafael1,Ochmann Martin

Affiliation:

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

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.

Funder

Deutsche Forschungsgemeinschaft

Publisher

World Scientific Pub Co Pte Ltd

Subject

Applied Mathematics,Computer Science Applications,Acoustics and Ultrasonics

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. A Boundary Element Method for Acoustic Problems in Relative Motion Between Source and Fluid;Journal of Theoretical and Computational Acoustics;2023-11-24

2. Modeling of Complex Moving Sound Sources Using a Cut Finite Element Method Approach;Journal of Theoretical and Computational Acoustics;2023-10-21

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