نتایج جستجو برای: sound propagation

تعداد نتایج: 208063  

ژورنال: اقیانوس شناسی 2022
;arimi, leila, akbarinasab, mohammad, Shafiee Sarvestani, Raheleh,

Background and Objectives: Influence of water mass on sound propagation in the Gulf of Aden underwater acoustics used for communication, navigation and identification of objects by both humans and marine mammals and for investigating the detrimental effects of anthropogenic activities (e.g. pile driving, seismic survey and ships) on marine animals. The Gulf of Aden presents a unique ecosystem t...

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ژورنال: انجمن مهندسی صوتیات ایران 2019
Ahmadi, R., Eshghi Sani, M., Talebitooti, R.,

The purpose of this article is to provide an analytical model of the vibroacoustic for an elastic beam submerged in low subsonic flows with mean velocities. In general, vibroacoustic modeling refers to the combined effects of sound propagation and mechanical vibration of the structure. Sound radiations from submerged structures are coupled with physical phenomena because the sound pressures act...

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Journal: :international journal of occupational hygiene 0
mehran shesh baradaran department of environmental engineering, school of environment and energy, science and research branch, islamic azad university, tehran, iran parvin nassiri professor, department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran mohammad reza monazzam esmail pour professor, department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran

original article     the aim of this study was to design and build a software for noise propagation prediction (indoor and from indoor to outdoor spaces) which is being commonly used in industry.  in this regard, firstly a mathematical complex model was created based on existing relationships about noise propagation in indoor spaces and transmission through the walls and propagation in outdoor ...

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Journal: مهندسی دریا 2009
A.M. Arasteh, M. Torabi Azad, Y. Bahman Pour, Z. Nour Ali Pour,

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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Journal: :The Journal of the Acoustical Society of America 1952

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Journal: :The Journal of the Acoustical Society of America 1952

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Journal: :The Journal of the Acoustical Society of America 1972

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Journal: :Nature 1960

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Journal: :MATEC Web of Conferences 2020

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2016
Erik M. Salomons Walter J. A. Lohman Han Zhou Andrew Baggaley

Propagation of sound waves in air can be considered as a special case of fluid dynamics. Consequently, the lattice Boltzmann method (LBM) for fluid flow can be used for simulating sound propagation. In this article application of the LBM to sound propagation is illustrated for various cases: free-field propagation, propagation over porous and non-porous ground, propagation over a noise barrier,...

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