Results 11 to 20 of about 1,246,575 (309)

Identification approach of acoustic cavitation via frequency spectrum of sound pressure wave signals in numerical simulation

Ultrasonics Sonochemistry, 2022
In a sono-reactor, complex ultrasound pressure wave signal can be detected, containing multiple information related to acoustic cavitation. In this present study, acoustic cavitation in a cylinder is investigated numerically.
Weixiang Lin, Juan Xiao, Jian Wen, Simin Wang   +3 more
doaj   +1 more source

Anisotropic spectra of acoustic turbulence

Physical Review E, 2000
We found universal anizopropic spectra of acoustic turbulence with the linear dispersion law \bbox{$ω(k) =ck$} within the framework of generalized kinetic equation which takes into account the finite time of three-wave interactions. This anisotropic spectra can assume both scale-invariant and non scale-invariant form. The implications for the evolution
L'vov, V. S, L'vov, Yu. V., Pomyalov, A.
openaire   +2 more sources

Electromagnetoelastic transport through a piezoelectric slab: Selective parity interplay of electromagnetic and acoustic resonances

AIP Advances, 2023
We present the complete solution concerning to transport properties of coupled transverse electromagnetic and shear acoustic waves propagating via a piezoelectric slab embedded into a homogeneous dielectric medium. Since the electroacoustics of our setup
A. Konovalenko, N. M. Makarov, F. Pérez-Rodríguez   +2 more
doaj   +1 more source

Spectral Acoustic Fingerprints of Sand and Sandstone Sea Bottoms

Journal of Marine Science and Engineering, 2022
Modern studies which dealt with the frequency domain analysis showed that a frequency-domain approach has an essential advantage and mentioned an inner qualitative relationship between the subsurface structure and its frequency spectra.
Uri Kushnir, Vladimir Frid
doaj   +1 more source

A Spectra-Based Equalization-Generation Combined Framework for Throat Microphone Speech Enhancement

IEEE Access, 2018
Non-acoustic sensors are widely used in speech signal processing tasks, and their immunity to the background acoustic noise shows great benefits to traditional speech enhancement.
Changyan Zheng, Jibin Yang, Xiongwei Zhang, Meng Sun, Tieyong Cao   +4 more
doaj   +1 more source

Analysis of Acoustic Attenuation Spectra of Lipon Glasses

Communications, 2010
The acoustic attenuation spectra which reflect the basic features of the relaxation and transport processes of the mobile ions of investigated phosphate and oxynitride phosphate glasses are analyzed.
Peter Hockicko, Francisco Munoz, Peter Bury, Peter Sidor   +3 more
doaj   +1 more source

Techniques for classifying acoustic resonant spectra [PDF]

Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers, 2002
A second-generation nondestructive evaluation (NDE) system that discriminates between different types of chemical munitions is under development. The NDE system extracts features from the acoustic spectra of known munitions, builds templates from these features, and performs classification by comparing features extracted from an unknown munition to a ...
Roberts, R. S., Lewis, P. S., Chen, J. T., Vela, O. A.   +3 more
openaire   +1 more source

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

Anisotropic spectra of acoustic type turbulence [PDF]

Physics of Plasmas, 2008
The problem of spectra for acoustic type of turbulence generated by shocks being randomly distributed in space is considered. It is shown that for turbulence with a weak anisotropy, such spectra have the same dependence in k-space as the Kadomtsev–Petviashvili spectrum: E(k)∼k−2.
Kuznetsov, E., Krasnoselskikh, Vladimir
openaire   +3 more sources

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