Results 121 to 130 of about 1,129,305 (370)

Propagation of sound through the Earth's atmosphere. 1: Measurement of sound absorption in the air. 2: Measurement of ground impedance [PDF]

open access: yes
The fabrication of parts for the acoustic ground impedance meter was completed, and the instrument tested. Acoustic ground impedance meter, automatic data processing system, cooling system for the resonant tube, and final results of sound absorption in ...
Becher, J.   +2 more
core   +1 more source

Computational Modeling of Reticular Materials: The Past, the Present, and the Future

open access: yesAdvanced Materials, EarlyView.
Reticular materials are advanced materials with applications in emerging technologies. A thorough understanding of material properties at operating conditions is critical to accelerate the deployment at an industrial scale. Herein, the status of computational modeling of reticular materials is reviewed, supplemented with topical examples highlighting ...
Wim Temmerman   +3 more
wiley   +1 more source

Controllable acoustic properties of tungsten-epoxy composites prepared using a shaker-type ball milling process

open access: yesResults in Materials
Tungsten-epoxy composites are often applied as backing layer substrates in piezoelectric-based ultrasonic transducers. Control of its acoustic impedance is crucial to customize the specifications of fabricated ultrasonic transducers, especially for ...
Darmawan Hidayat   +3 more
doaj  

Generalized acoustic impedance metasurface

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

Acoustic metafluid for independent manipulation of the mass density and bulk modulus

open access: yesMaterials & Design, 2023
Tuning the mass density and bulk modulus independently is the key to manipulate the propagation of sound wave. Acoustic metamaterials provide a feasible method to realize various acoustic parameters.
Yafeng Bi   +7 more
doaj  

Two-parameter boundary condition applied to transverse acoustic impedance of a Fermi liquid

open access: yes, 2017
We discuss surface scattering in terms of bidirectional reflectance distribution function. We formulate a boundary condition that in addition to diffuse and specular reflection has tilted diffuse reflection.
Kuorelahti, J. A., Thuneberg, E. V.
core   +1 more source

From Mechanoelectric Conversion to Tissue Regeneration: Translational Progress in Piezoelectric Materials

open access: yesAdvanced Materials, EarlyView.
This review highlights recent progress in piezoelectric materials for regenerative medicine, emphasizing their ability to convert mechanical stimuli into bioelectric signals that promote tissue repair. Key discussions cover the intrinsic piezoelectric properties of biological tissues, co‐stimulation cellular mechanisms for tissue regeneration, and ...
Xinyu Wang   +3 more
wiley   +1 more source

Design principles of transducers with matching layers based on admittance measurements

open access: yesArchives 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  

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