Results 161 to 170 of about 2,694 (304)

On the relevance of facesheet orifice geometry to acoustic liner impedance. [PDF]

NPJ Acoust
Avallone F, Khedr A, Paduano A, Scarano F, Meirelles L, Cordioli J.   +5 more
europepmc   +1 more source

A new method for calculating the sound energy density based on geometrical acoustics

, 2002
Unlike the well-known computation of sound energy density based on the concept of sound intensity and on the assumptions of geometrical acoustics, in this paper a newcomputational scheme is developed and experimentally verified.
PRODI, Nicola
core  

Defect Driven Electronic Structure Reconfiguration and Hierarchical Phonon Suppression in Ag2Se Thermoelectrics

Advanced Science, EarlyView.
Indium substitution in Ag2Se nanocrystals simultaneously tailors electronic structure and lattice dynamics. Fermi‐level upshift and band‐gap narrowing enhance electrical transport, while defect‐induced lattice softening intensifies phonon scattering and suppresses lattice thermal conductivity.
Yineng Gou, Mengyao Li, Fang Lyu, Xiaolong Sun, Muyang Huang, Wenhao Xie, Liangwei Hu, Wei Cao, Yue Hou, Yong Liu, Andreu Cabot, Ziyu Wang   +11 more
wiley   +1 more source

Thermally Programmable Two-Port Non-Hermitian Acoustic Metastructure for Broadband and Direction-Dependent Absorption. [PDF]

Adv Sci (Weinh)
Guo Z, Li Z, Lei Z, Yang Z, Zeng K, Fan Z, Wang Z.   +6 more
europepmc   +1 more source

Convergence study of phased geometrical acoustics using a low frequency reflection coefficient

, 2016
This work investigates phased geometrical acoustics using a low frequency reflection coefficient. This reflection coefficient, which is derived from an exact solution to a half-space problem, consists of an integral of image sources located at complex ...
Boucher, Matthew Alban, Desmet, Wim, Pluymers, Bert   +2 more
core  

Impedance‐Matched High‐Overtone Thickness‐Shear Bulk Acoustic Resonators With Scalable Mode Volume

Advanced Science, EarlyView.
A bottom‐electrode‐free high‐overtone bulk acoustic resonator is achieved by lateral excitation of antisymmetric thickness‐shear modes on a lithium‐niobate‐on‐silicon platform. Planar electrode geometry eliminates conventional loading along the resonance path and confines acoustic energy within the electrode gap.
Zi‐Dong Zhang, Zhen‐Hui Qin, Yi‐Han He, Yun‐Fei Cheng, Hao Yan, Si‐Yuan Yu, Ming‐Hui Lu, Yan‐Feng Chen   +7 more
wiley   +1 more source

Multi-Layered Porous Helmholtz Resonators for Low-Frequency and Broadband Sound Absorption. [PDF]

Materials (Basel)
Liu X, Gu T, Li L, Wang D.
europepmc   +1 more source

Creation of virtual sound environments using geometrical acoustics and finite elements method

, 2012
In this paper, the sound pressure field of a small room was analysed using geometrical acoustics methods, a wave equation method in the frequency domain and binaural impulse response measurements in order to create virtual sound environments for specific
Holland, Keith, Tafur Jimenez, Luis, Takeuchi, Takashi   +2 more
core  

Multiscale Architecture and Mechanics of the Cell Nucleus: Implications for Disease, Bioengineering and Nanomedicine

Advanced Science, EarlyView.
Nuclear mechanical properties are inherently scale‐dependent, arising from a hierarchical architecture that spans DNA, chromatin, the nuclear envelope, and condensates. Experimental techniques and theoretical models are integrated into a cohesive multiscale framework linking nanoscale structural features to organelle‐level mechanical behavior.
Xinran Liu, Xin Chen, Qingyang Zhao, Weikang Tan, Lingrui Zhu, Kin Liao, Vincent Chan, Nicolae Goga, Winfred O. Larkotey, Yang Li, Yinghui Shi, Wenya Shu, Lin Wang, Weiqing Wang, Tian Jian Lu, Yulong Han   +15 more
wiley   +1 more source

A multimodal framework for attenuation of piston and planar waves in impedance-lined ducts. [PDF]

PLoS One
Alrashdi A, Safdar M, Ismail HU, Alkuhayli N.   +3 more
europepmc   +1 more source