Results 21 to 30 of about 1,203,879 (258)

The Magnitude of the Frequency Jitter of Acoustic Waves Generated by Wind Instruments Is of Relevance for the Live Performance of Music

Acoustics, 2021
It is shown that a gold-plated device mounted on a tenor saxophone, forming a small bridge between the mouthpiece and the S-bow, can change two characteristics of the radiated sound: (1) the radiated acoustic energy of the harmonics with emission maxima ...
Alexander M. Rehm
doaj   +1 more source

Acoustic propagation characteristics of heteromorphic metamaterials

AIP Advances, 2018
To explore the propagation characteristics of acoustic waves in heterogeneous acoustic materials, we studied the propagation of acoustic waves in resonant phononic crystals.
Jianning Han, Shuai Tang
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Interface transmittance and interface waves in acoustic Willis media

Frontiers in Physics, 2023
Acoustics Willis media, known as bianisotropic acoustic media, incorporate additional coupling between pressure and velocity and between momentum and volumetric strain in their constitutive equation.
Hongfei Qu, Hongfei Qu, Xiaoning Liu, Anfu Zhang   +3 more
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Theoretical mass sensitivity of Love wave and layer guided acoustic plate mode sensors [PDF]

, 2002
A model for the mass sensitivity of Love wave and layer guided shear horizontal acoustic plate mode (SH–APM) sensors is developed by considering the propagation of shear horizontally polarized acoustic waves in a three layer system. A dispersion equation
Newton, Michael, G. McHale, F. Martin, Martin, Fabrice, M. I. Newton, McHale, Glen, Newton, MI, McHale, G, Martin, F   +8 more
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Plane and Surface Acoustic Waves Manipulation by Three-Dimensional Composite Phononic Pillars with 3D Bandgap and Defect Analysis

Acoustics, 2021
The current century witnessed an overwhelming research interest in phononic crystals (PnCs) and acoustic metamaterials (AMs) research owing to their fantastic properties in manipulating acoustic and elastic waves that are inconceivable from naturally ...
Muhammad, C.W. Lim, Andrew Y. T. Leung
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Acoustic Transmission Characteristics Based on H-Type Metamaterials

IEEE Access, 2019
To achieve the artificial manipulation of the acoustic wave front, and to produce high-efficiency acoustic focusing effect, this paper designed an $H$ -type locally resonant metamaterial structure based on a two-dimensional three-component local ...
Shuai Tang, Jianning Han
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A Comparative Study of In Situ Methodologies for Assessment of RF EMF Exposure From a 5G FR2 Base Station

IEEE Access
In this work, in situ measurements of the radio frequency electromagnetic field exposure have been conducted for an indoor massive MIMO 5G base station operating at 26–28 GHz.
Samuel Goegebeur, Kenneth Deprez, Davide Colombi, Jens Eilers Bischoff, Carla Di Paola, Bram Stroobandt, Leen Verloock, Sam Aerts, Christer Tornevik, Wout Joseph   +9 more
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Research on acoustic conduction mechanism of underwater acoustic channel based on metamaterials

AIP Advances, 2020
In underwater acoustic communication, there are problems of low transmission efficiency, severe loss, and inaccurate point-to-point transmission. To realize the efficient transmission of underwater acoustic communication based on finite element analysis,
Xinsa Zhao, Peng Yang, Rongrong Zhao, Jianning Han   +3 more
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Reflection of an acoustic line source by an impedance surface with uniform flow

, 2014
An exact analytic solution is derived for the 2D acoustic pressure field generated by a time-harmonic line mass source located above an impedance surface with uniform grazing flow. Closed-form asymptotic solutions in the far-field are also provided.
Gabard, Gwénaël, Brambley, E.J., Gabard, G., Brambley, E. J.   +3 more
core   +1 more source

Directional acoustic transmission based on metamaterials

AIP Advances, 2018
To explore the simple low-loss operation of directional acoustic transmission technology, the propagation of acoustic waves in resonant phononic crystals was studied, and a transmission model based on acoustic metamaterials was constructed.
Shuai Tang, Jianning Han, Tingdun Wen
doaj   +1 more source