Results 271 to 280 of about 9,353,121 (336)
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Microdefocusing method for measuring acoustic properties using acoustic microscope
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1992Many papers have been reporting on measuring acoustic properties of materials by acoustic microscopy. In a conventional method of V (z) curve analysis, the phase velocity and the propagation attenuation of a leaky surface acoustic wave (LSAW) are determined from the interference period Deltaz and the slope of the V(z) curve, respectively.
H, Kanai, N, Chubachi, T, Sannomiya
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Acoustical properties of “FABRASORB” acoustical fabrics
The Journal of the Acoustical Society of America, 1982“FABRASORD” acoustical fabric was developed by CHEMFAB about six years ago to provide a solution to the poor acoustics (U. S. Patent No. 4,152,474) within fabric structures. Based on woven fiberglass and polytetrafluoreotylene (PTFE) resins, it is a natural companion to “SHEERFILL” architectural fabrics which have enabled fabric structures to meet all ...
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Alloys with Acoustic Properties
Applied Mechanics and Materials, 2014Considering that, in Accordance with the Laws of Physics, the Sound Travels only through Elastic Bodies, the Main Characteristic of an Acoustic Material is the Elasticity. Classifying the Metallic Materials in this Regard is Quite Difficult, as the Elasticity is Characterized by more than One Component (static Elastic Modulus, Dynamic Elastic Modulus ...
Ion Hopulele +2 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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2016
One of the defining thematic preoccupations in the fiction filmmaking of Philippe Grandrieux, one of the leading figures in French Art Cinema, is that of the politics of property. InSombre, La Vie Nouvelle, andUn Lac, the relationship dynamics between a woman and a variety of agents competing to claim her are mapped out in the overlap between different
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One of the defining thematic preoccupations in the fiction filmmaking of Philippe Grandrieux, one of the leading figures in French Art Cinema, is that of the politics of property. InSombre, La Vie Nouvelle, andUn Lac, the relationship dynamics between a woman and a variety of agents competing to claim her are mapped out in the overlap between different
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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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Acoustic Properties of Nanofibers
Noise & Vibration Worldwide, 2014In recent years nanofibers have been used in the field of applied acoustics to improve the acoustic characteristics of traditional materials without increasing their weight and size. In this paper acoustic measurements are reported of the absorption coefficient of porous materials coated with a layer of nanofibers carried out with the impedance tube (“
IANNACE, Gino +4 more
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Acoustic properties of honeycomb like sandwich acoustic metamaterials
Applied Acoustics, 2022Xiao-Ling Gai +6 more
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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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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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