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Acoustical properties of gravel
The Journal of the Acoustical Society of America, 2004Gravel is an example of a rigid-porous granular material. It is available with several mean stone sizes and hence with a range of flow resistivity. The flow resistivity of gravel varies significantly with flow velocity. Data for low- and high-amplitude impedance are presented and compared with predictions of linear and nonlinear theories based on the ...
Keith Attenborough, Olga Umnova
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ACOUSTIC PROPERTIES OF SOYBEANS
Transactions of the ASAE, 1990ABSTRACT Acoustic transmission and impact force response methods were investigated for classification of soybeans. The transmission method was slow and not suitable for real-time application. A polynomial was fitted to the deconvolved frequency spectrum of acoustic impulse data for soybeans.
Misra, Manjit +3 more
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Acoustical Properties of Farmland
Journal of Agricultural Engineering Research, 2000Although many measurements have been made of the propagation of sound over grassland, there are relatively few data over cultivated surfaces. The propagation of sound over an absorbing surface is influenced by the impedance of the surface and the locations of the source and the receiver.
K. Attenborough +3 more
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Applied Acoustics, 1996
Wool is a natural product which is safe and pleasant to work with and has useful acoustical properties. The acoustical properties have been investigated to find the most suitable applications and to see whether it could be used in some applications in place of man-made mineral fibres.
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Wool is a natural product which is safe and pleasant to work with and has useful acoustical properties. The acoustical properties have been investigated to find the most suitable applications and to see whether it could be used in some applications in place of man-made mineral fibres.
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Acoustic Properties of the Rocks
1987The ability of rocks to transmit elastic energy is controlled by their acoustic properties, which are classified into two groups, kinetic and dynamic. In the section of the Kola well these properties were studied on core samples taken from the well and by logging.
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The Journal of the Acoustical Society of America, 1948
Many qualitative observations have been made on the quieting effect of newly fallen snow. This natural phenomenon must depend on the acoustical properties of such a layer of snow. While the physical constants for snow vary over a considerable range, and the data for obtaining some of the necessary acoustic constants are meager, the general behavior of ...
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Many qualitative observations have been made on the quieting effect of newly fallen snow. This natural phenomenon must depend on the acoustical properties of such a layer of snow. While the physical constants for snow vary over a considerable range, and the data for obtaining some of the necessary acoustic constants are meager, the general behavior of ...
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Acoustical Properties of Carpet
The Journal of the Acoustical Society of America, 1955Data are presented on the acoustical properties of carpet. Values of absorption coefficient, acoustic impedance, and flow resistance are given for carpet having various physical properties. This work was supported by a grant from the Carpet Institute, Incorporated.
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Applied Acoustics, 1987
Abstract A model has been proposed for bituminous coal which takes into consideration the transverse isotropic properties of coal and the effects of the nature of fluid in the pores on its acoustical properties. The predicted values were then compared with the experimental results performed on a bituminous coal slab, and good agreement was found ...
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Abstract A model has been proposed for bituminous coal which takes into consideration the transverse isotropic properties of coal and the effects of the nature of fluid in the pores on its acoustical properties. The predicted values were then compared with the experimental results performed on a bituminous coal slab, and good agreement was found ...
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