Results 221 to 230 of about 8,989,935 (300)
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ACOUSTICAL ROAD PARAMETERS IDENTIFICATION
8th European Conference on Noise Control 2009, 2023Many impedance models can be used for describing the acoustical behaviour of a road. These models rely on some intrinsic parameters (2,3 or 4), which are difficult to measure in the field. Therefore, the measurement of these parameters usually requires to destroy the structure.
Heinkele, Christophe +2 more
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Acoustic parameters of ocular tissues
Ultrasound in Medicine & Biology, 1985The sound velocity and the impedance of animal eyes and human eyes are measured by high frequency RF echograms (10 MHz) using a digital computer. The results are compared to literature data from 1955 to 1965, which were obtained with completely different techniques.
J M, Thijssen, H J, Mol, M R, Timmer
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Non-acoustical parameters and sound absorption characteristics of porous polyurethane foams
The Physics of Fluids, 2019The present paper investigates the relationships between non-acoustical parameters and sound absorption characteristics of the porous polyurethane foams based on the proposed simplistic unit cell model.
J. Ning, Guiping Zhao, Xiping He
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Journal of the Acoustical Society of America, 2020
The open porosity of air-saturated acoustical porous materials is estimated from the low-frequency or high-frequency asymptotes of the real part of the dynamic bulk modulus.
L. Jaouen, E. Gourdon, P. Glé
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The open porosity of air-saturated acoustical porous materials is estimated from the low-frequency or high-frequency asymptotes of the real part of the dynamic bulk modulus.
L. Jaouen, E. Gourdon, P. Glé
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Journal of Molecular Liquids, 2019
Binary liquid mixture containing aniline and toluene is used to obtain ultrasonic velocities, densities and viscosities over the entire mole fraction range of aniline at temperatures T = (303.15, 308.15, 313.15 and 318.15) K. Thermo-acoustical parameters
Timmeswara Sarma Nori +3 more
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Binary liquid mixture containing aniline and toluene is used to obtain ultrasonic velocities, densities and viscosities over the entire mole fraction range of aniline at temperatures T = (303.15, 308.15, 313.15 and 318.15) K. Thermo-acoustical parameters
Timmeswara Sarma Nori +3 more
semanticscholar +1 more source
Acoustic Parameters of Personality
The Journal of the Acoustical Society of America, 1972Twenty-four adult males of diverse socioeconomic background were recorded as they recited a standard passage. They also recited the same passage while pretending to be excited and pretending to be depressed. The normal passages were analyzed and then synthesized by means of a terminal analog synthesizer, and then again synthesized in the following ...
B. L. Brown, W. J. Strong, A. C. Rencher
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Effective Parameters of Acoustic Metamaterials
Russian Physics Journal, 2018Analytical expressions are presented for the wave number, the characteristic wave impedance, and the refractive index of homogeneous longitudinal plane waves propagating in an acoustic metamaterial with dissipative losses. The metamaterial is characterized by the effective scalar material parameters: the complex density and the compressibility.
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Extracting the intrinsic geo-acoustic parameters from the effective geo-acoustic parameters
The Journal of the Acoustical Society of America, 2018So far, most of the geoacoustic (GA) parameters are inverted through model-based approaches. The inverted GA parameters are not the intrinsic ones but the so-called “effective” ones. The “effective” GA parameters are model and frequency dependent and will be distorted due to model-mismatching.
Juan Zeng +3 more
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New (stage) parameter for conductor's acoustics
The Journal of the Acoustical Society of America, 2008During fine-tuning of the stage acoustics of the main auditorium of Casa da Musica, designed by the Office for Metropolitan Architecture, in Porto (Portugal) we were confronted with conflicting comments with respect to the acoustic effect of different canopy positions.
Braak, van den, E.W.M. +1 more
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Footstep Recognition with Psyco-acoustics Parameter
APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems, 2006The characteristics of a footstep are determined by the gait, the footwear and the floor. Accurate footstep analysis would be useful in various applications, home security service, surveillance and understanding of human action since the gait expresses personality, age and gender.
Akitoshi Itai, Hiroshi Yasukawa
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