منابع مشابه
DYNAMICAL SIMULATION OF UNDERWATER SOUND PROPAGATION IN THE HORMOZ STRAIT
Providing an illustration of sound propagation in the Hormoz Strait ,this paper is about acoustic wave propagation in shallow water for a harmonic point source with low frequency, less than 1000 and solution of a homogenous Helmholtz equation using parabolic equation. C++ programming is used to solve Helmholtz equation [9] and MATLAB software is used to illustrate figures and animate them [6], ...
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In the last years, societies growing environmental and health conscience, obliged the national authorities to reinforce existing legislation concerning the maximum permissible noise levels. These new demands lead to increasingly accurate tools to perform noise analysis, not only because they must include a growing number of parameters that influence its propagation, thus with more complexity, b...
متن کاملSound propagation in a turbulent atmosphere near the ground: a parabolic equation approach.
The interference of the direct wave from the point source to the receiver and the wave reflected from the impedance ground in a turbulent atmosphere is studied. A parabolic equation approach for calculating the sound pressure p at the receiver is formulated. Then, the parabolic equation is solved by the Rytov method yielding expressions for the complex phases of direct and ground-reflected wave...
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The characteristics of acoustic waves propagating in the atmosphere are mainly determined by the environment. Acoustic signals vary both in space and time, and the dominant source of this variability is the turbulence of the atmospheric boundary layer. The influence of temperature and velocity random fluctuations have been demonstrated in many experimental studies. During the last decade signif...
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ژورنال
عنوان ژورنال: Nature
سال: 1960
ISSN: 0028-0836,1476-4687
DOI: 10.1038/188992a0