منابع مشابه
Sound Propagation through Forests and Tree Belts
The potential of forests or narrow belts of trees alongside surface transport corridors for reducing noise is often dismissed. Partly this is a consequence of conflicting experimental evidence. But also it is the result of incomplete understanding of the various attenuation mechanisms involved and, therefore, of how they could be exploited and used together in tree planting schemes. First exper...
متن کاملSound Propagation Through the Stochastic Ocean.
The ocean is opaque to electromagnetic radiation and transparent to low-frequency sound. So acoustical methodologies are an important tool for sensing the undersea world. Stochastic sound-speed fluctuations in the ocean, such as those caused by internal waves, result in a progressive randomization of acoustic signals as they traverse the ocean environment. This signal randomization imposes a li...
متن کاملWave Propagation in Mixture of Generalized Thermoelastic Solids Half-Space
This paper concentrates on the reflection of plane waves in the mixture of generalized thermo elastic solid half-space. There exists quasi dilatational waves i.e. qP1, qP2, qT and two rotational waves S1, S2 in a two dimensional model of the solid. The boundary conditions are solved to obtain a system of five non-homogeneous equations for amplitude ratios. These amplitude ratios are found to de...
متن کاملDYNAMICAL 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], ...
متن کاملMultiscale Modelling of Sound Propagation through the Lung Parenchyma
In this paper we develop and study numerically a model to describe some aspects of sound propagation in the human lung, considered as a deformable and viscoelastic porous medium (the parenchyma) with millions of alveoli filled with air. Transmission of sound through the lung above 1 kHz is known to be highly frequency-dependent. We pursue the key idea that the viscoelastic parenchyma structure ...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1952
ISSN: 0001-4966
DOI: 10.1121/1.1917509