Results 21 to 30 of about 33,703 (304)

Analysis of Acoustic Signals During the Optical Breakdown of Aqueous Solutions of Fe Nanoparticles

Frontiers in Physics, 2020
The study investigates the spectra of acoustic signals generating during the optical breakdown of colloidal solutions of iron nanoparticles. A characteristic form of the acoustic spectrum has been experimentally established, a distinctive feature of ...
Ilya V. Baimler, Andrey B. Lisitsyn, Dmitriy A. Serov, Dmitriy A. Serov, Maxim E. Astashev, Maxim E. Astashev, Sergey V. Gudkov   +6 more
doaj   +1 more source

Monitoring of the Aggregation Process of Dense Colloidal Silica Suspensions in a Stirred Tank by Acoustic Spectroscopy [PDF]

, 2008
The aim of this study is to analyze the behaviour of dense colloidal suspensions in flow by acoustic spectroscopy. The destabilization and the aggregation of stable colloidal silica dispersions in a stirred tank are obtained by addition of salt ...
Frances, Christine, Tourbin, Mallorie
core   +1 more source

Acoustic properties of La3Ga5.3Ta0.5Al0.2O14 crystal

Modern Electronic Materials, 2015
Development and search for new advanced materials of the lanthanum gallium silicate group with unique thermal properties is of great importance for the development of acoustoelectronics based on volume and surface acoustic waves. The processes of surface
Dmitry V. Roshchupkin, Dmitry V. Irzhak, Eugeny V. Emelin, Sergei A. Sakharov, Alexey N. Zabelin   +4 more
doaj   +1 more source

Acoustic-electrical testing of defects in the cement-sand and cement-glass model samples [PDF]

Қарағанды университетінің хабаршысы. Физика сериясы, 2021
A complex method of acoustic-electrical testing of defects in dielectric samples made from cement-sand and cement-glass mixtures is discussed. The paper reports the results of studies of changes in the parameters of electromagnetic responses and
A.A. Bespalko, D.D. Dann, M.V. Petrov, E.K. Pomishin   +3 more
doaj   +1 more source

Energy-Dynamics Resulting in Turbulent and Acoustic Phenomena in an Underexpanded Jet

Aerospace, 2018
Underexpanded jets exhibit interactions between turbulent shear layers and shock-cell trains that yield complex phenomena that are absent in the more commonly studied perfectly expanded jets.
Unnikrishnan Sasidharan Nair, Kalyan Goparaju, Datta Gaitonde   +2 more
doaj   +1 more source

Velocity Estimation of Moving Acoustic Source Based on Acoustic Intensity Interference with Dual Hydrophones in Shallow Water

水下无人系统学报, 2023
Considering the difficulty in estimating the acoustic source motion velocity using an interference striation pattern of a broadband continuum spectrum in a low-frequency analysis and recording(LOFAR) spectrum at a low signal-to-noise ratio(SNR), a moving
Yuan YAO, Chao SUN, Lei XIE, Xionghou LIU   +3 more
doaj   +1 more source

A Three-Dimensional Method for Analysis of the Body Mode of Classical Guitars Using a Laser Displacement Sensor

Sensors
In classical guitar acoustic spectra, the lowest frequency body mode’s amplitude often significantly surpasses that of the string overtones. However, the characteristics of the body mode have not been systematically utilized to quantitatively represent ...
Kuan-Cheng Su, Tsung-Yu Hsieh, Wei-Chih Lin, Fu-Li Hsiao, Tatyana Ryzhkova, Chii-Chang Chen   +5 more
doaj   +1 more source

Determination of acoustic phonon anharmonicities via second-order Raman scattering in CuI

New Journal of Physics, 2023
We demonstrate the determination of anharmonic acoustic phonon properties via second-order Raman scattering exemplarily on copper iodide single crystals.
R Hildebrandt, M Seifert, J George, S Blaurock, S Botti, H Krautscheid, M Grundmann, C Sturm   +7 more
doaj   +1 more source

Remotely Exploring Deeper-Into-Matter by Non-Contact Detection of Audible Transients Excited by Laser Radiation

Sensors, 2017
An acoustic spectroscopic approach to detect contents within different packaging, with substantially wider applicability than other currently available subsurface spectroscopies, is presented.
Javier Moros, Inmaculada Gaona, J. Javier Laserna   +2 more
doaj   +1 more source

Influence of the Core Pillar Height on the Bandgap Characteristics of Piezoelectric Phononic Crystals with Ring-Shaped Grooves

Cumhuriyet Science Journal, 2022
Dispersion profiles and surface acoustic wave attenuation characteristics of ring-shaped phononic crystals are investigated as a function of the core pillar height. Finite element method simulations are carried out for both band analyses and transmission
Furkan Kuruoğlu
doaj   +1 more source