Results 1 to 10 of about 22,518 (261)

Generalized acoustic impedance metasurface

Communications Physics
Impedance theory has become a favorite method for metasurface design as it allows perfect control of wave properties. However, its functionality is strongly limited by the condition of strict continuity of normal power flow.
Yu-Ze Tian, Yan-Feng Wang, Vincent Laude, Yue-Sheng Wang   +3 more
doaj   +1 more source

Ultrasonic study of polyethylene glycol and ethanol interactions: impact of concentration and temperature

Chemical Thermodynamics and Thermal Analysis
This study examines the molecular interactions between polyethylene glycol (PEG) at concentrations of 5%, 10%, and 15% with ethanol, utilizing ultrasonic techniques across temperatures of 25 °C, 35 °C, 45 °C, and 55 °C. Key acoustic parameters, including
Niharika Das, Subhraraj Panda, Manoj Kumar Praharaj   +2 more
doaj   +1 more source

Model Based Inversion of Acoustic Impedance from Seismic Trace for Lithofacies Differentiation: an Application in Xy Field Offshore Niger Delta

Journal of Applied Sciences and Environmental Management, 2019
This study presents the result of a Model-based seismic inversion technique which was used to invert an acoustic impedance structure within a reservoir interval by intergrating well logs and 3D post stack seismic data obtained from XY field offshore ...
S. Eze, O.M. Orji, S.l. Nnorom, K. Ubogun   +3 more
doaj   +1 more source

The Acoustic Impedance of a Vibrating Annular Piston Located on a Flat Rigid Baffle Around a Semi-Infinite Circular Rigid Cylinder

Archives of Acoustics, 2013
The axisymmetric problem of acoustic impedance of a vibrating annular piston embedded into a flat rigid baffle concentrically around a semi-infinite rigid cylindrical circular baffle has been undertaken in this study.
Wojciech P. RDZANEK, Witold J. RDZANEK, Dawid PIECZONKA   +2 more
doaj  

On impedance conditions for circular multiperforated acoustic liners

Journal of Mathematics in Industry, 2018
Background The acoustic damping in gas turbines and aero-engines relies to a great extent on acoustic liners that consists of a cavity and a perforated face sheet.
Kersten Schmidt, Adrien Semin, Anastasia Thöns-Zueva, Friedrich Bake   +3 more
doaj   +1 more source

Acoustophoretic Characterization and Separation of Blood Cells in Acoustic Impedance Gradients. [PDF]

Phys Rev Appl, 2023
Charan MR, Augustsson P.
europepmc   +1 more source

Acoustic Impedance Evaluation of the Polymer-Polymer Hybrid Composites as Insulator Building Materials. [PDF]

Polymers (Basel), 2023
Fahad BM, Al-Jadiri RSF.
europepmc   +1 more source

Design principles of transducers with matching layers based on admittance measurements

Archives of Acoustics, 2014
Basing on modified Mason's equivalent circuit of an acoustic probe the authors carried out the computation of admittances and pulses reflected from the ideal reflector immersed in water.
G. ŁYPACEWICZ, E. DURIASZ
doaj  

Enhancement of Ultrasonic Transducer Bandwidth by Acoustic Impedance Gradient Matching Layer. [PDF]

Sensors (Basel), 2022
Zhu K, Ma J, Qi X, Shen B, Liu Y, Sun E, Zhang R.   +6 more
europepmc   +1 more source

Ultrasonic surface acoustic wave-assisted separation of microscale droplets with varying acoustic impedance. [PDF]

Ultrason Sonochem, 2023
Ali M, Park J.
europepmc   +1 more source