Results 21 to 30 of about 33,808 (304)

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

open access: yesFrontiers 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   +6 more
doaj   +1 more source

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

open access: yes, 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

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

open access: yesSensors
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   +5 more
doaj   +1 more source

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

open access: yesModern 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   +4 more
doaj   +1 more source

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

open access: yes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   +3 more
doaj   +1 more source

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

open access: yesAerospace, 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   +2 more
doaj   +1 more source

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

open access: yesNew 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   +7 more
doaj   +1 more source

Modeling late reverberation in acoustic echo suppression [PDF]

open access: yes, 2022
The traditional approach to cope with acoustic echoes is the use of an acoustic echo canceler (AEC). Usually, subband acoustic echo suppression (AES) is used after the AEC to suppress residual echoes which have not been subtracted.
Faller, C., Kuech, F., Favrot, A.
core  

Direct numerical simulation of turbulent flow past a trailing edge and the associated noise generation [PDF]

open access: yes, 2008
Direct numerical simulations (DNS) are conducted of turbulent flow passing an infinitely thin trailing edge (TE). The objective is to investigate the turbulent flow field in the vicinity of the TE and the associated broadband noise generation.
Sandberg, Richard D., Sandham, Neil D.
core   +1 more source

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

open access: yesSensors, 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   +2 more
doaj   +1 more source

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