Results 1 to 10 of about 3,373 (89)

Probing the pressure dependence of sound speed and attenuation in bubbly media: Experimental observations, a theoretical model and numerical calculations

Ultrasonics Sonochemistry, 2023
The problem of attenuation and sound speed of bubbly media has remained partially unsolved. Comprehensive data regarding pressure-dependent changes of the attenuation and sound speed of a bubbly medium are not available.
A.J. Sojahrood, Q. Li, H. Haghi, R. Karshafian, T.M. Porter, M.C. Kolios   +5 more
doaj   +3 more sources

Sound speed gradients in mud [PDF]

JASA Express Letters, 2021
Various methods have been used to estimate sound speed profiles in mud at the New England Mud Patch. Some of these methods show large sound speed gradients of order 10 s−1.
Charles W. Holland
doaj   +1 more source

Wide-area sound speed profile estimation based on a pre-classification scheme for sound speed perturbation modes

Frontiers in Marine Science, 2023
IntroductionThe trend of sound speed profile (SSP) inversion is towards wide-area sound speed estimation. However, the traditional inversion method of dividing the latitude and longitude grids has limitations in terms of significantly lower accuracy when
Chen Liu, Ke Qu
doaj   +1 more source

Evaluation of glycerol speed of sound

Research and Review Journal of Nondestructive Testing, 2023
The speed of sound in the liquid glycerol was calculated from the wave propagation time measurement in through transmission mode by using a designed acoustical cell. Measurements were carried out at atmospheric pressure and temperatures ranging from 298.
Jaime Santos, Abel G. M. Ferreira, Anastazija Ratkajec, Mario J. Santos   +3 more
doaj   +1 more source

HOLOGRAPHY AND THE SPEED OF SOUND [PDF]

International Journal of Modern Physics A, 2010
We study the approach of the speed of sound towards the value [Formula: see text] at high temperatures in a general class of strongly interacting theories. This class includes theories holographically dual to a theory of gravity coupled to a single scalar field, representing the operator of the scale anomaly.
Hohler, Paul M., Stephanov, Mikhail A.
openaire   +1 more source

Breast Acoustic Parameter Reconstruction Method Based on Capacitive Micromachined Ultrasonic Transducer Array

Micromachines, 2021
Ultrasound computed tomography (USCT) systems based on capacitive micromachined ultrasonic transducer (CMUT) arrays have a wide range of application prospects.
Yu Pei, Guojun Zhang, Yu Zhang, Wendong Zhang   +3 more
doaj   +1 more source

Manual of GUI Program Governing ABAQUS Simulations of Bar Impact Test for Calibrating Bar Properties, Measured Strain, and Impact Velocity

Data, 2023
Bar impact instruments, such as the (split) Hopkinson bars and direct impact Hopkinson bars, measure blast/impact waves or mechanical properties of materials at high strain rates.
Hyunho Shin
doaj   +1 more source

S-shaped dependence of the sound pressure level in outdoor propagation on the effective sound speed gradient

Acta Acustica, 2022
The effective sound speed gradient is used to describe the meteorological conditions during sound measurements at roads and railways. Meteorological parameters were assessed up to a height of 10 m.
Hohenwarter Dieter, Mursch-Radlgruber Erich, Kirisits Christian   +2 more
doaj   +1 more source

Beyond the speed of SOUND [PDF]

Breast Cancer, 2020
Much anticipation awaits the results of the SOUND trial, (Gentilini and Veronesi in Breast 21:678-681, 2012) which may prove the futility of performing sentinel node biopsy (SNB) in low-risk breast cancer patients. However, do we really not know the answer to the questions that the SOUND trial poses already? Consideration must be taken of the very much
openaire   +2 more sources

High-Frequency Dependence of Acoustic Properties of Three Typical Sediments in the South China Sea

Journal of Marine Science and Engineering, 2022
The acoustic characteristics of three fine-grained sediments (silty sand, silt, silty clay) in the South China Sea (SCS) were measured and analyzed at high frequency range of 27–247 kHz.
Jingqiang Wang, Zhengyu Hou, Guanbao Li, Guangming Kan, Baohua Liu, Xiangmei Meng, Qingfeng Hua, Lei Sun   +7 more
doaj   +1 more source