Results 1 to 10 of about 9,260,103 (204)

Conical Statistical Optimal Near-Field Acoustic Holography with Combined Regularization [PDF]

Sensors, 2021
For the sound field reconstruction of large conical surfaces, current statistical optimal near-field acoustic holography (SONAH) methods have relatively poor applicability and low accuracy.
Wei Cheng, Jinglei Ni, Chao Song, Muhammad Mubashir Ahsan, Xuefeng Chen, Zelin Nie, Yilong Liu   +6 more
doaj   +5 more sources

Four decades of near-field acoustic holography

The Journal of the Acoustical Society of America, 2022
The Reflections series takes a look back on historical articles from The Journal of the Acoustical Society of America that have had a significant impact on the science and practice of acoustics.
Efren Fernandez-Grande
semanticscholar   +6 more sources

Statistically Optimized Near-Field Acoustic Holography Using Prolate Spheroidal Wave Functions

Shock and Vibration, 2023
Near-field acoustic holography (NAH) is an effective tool for realizing accurate sound field reconstruction in three-dimensional space on the prerequisite that appropriate elementary wave functions are selected or constructed to match the characteristics
Xuxin Zhang, Jingjun Lou, Jinfang Lu, Ronghua Li, Shijian Zhu   +4 more
doaj   +2 more sources

Compressive equivalent source method based on particle velocity measurements for near-field acoustic holography

Measurement + Control, 2023
In order to solve the problems of spatial resolution limit and reduce the measurement cost, the compressive sensing theory and the sparse regularization are applied to the near-field acoustic holography (NAH) technology.
Wen-Qian Jing, Guang-Sheng Liu
doaj   +2 more sources

Micro/Nanoscale Acoustic Manipulation: From Particle Control to Autonomous Microswimmers. [PDF]

Adv Sci (Weinh)
This conceptual framework illustrates acoustic technology as a multifunctional platform enabling passive particle manipulation across scales and autonomous propulsion of microswimmers. ABSTRACT Acoustic manipulation and propulsion technologies have emerged as powerful platforms for micro/nanoscale control, enabled by their non‐contact operation, label ...
Chu J, Zhang L, Wang X, Li W, Liu Y.
europepmc   +2 more sources

Super-Resolution and High-Data-Density Acoustic Meta-Hologram via Amplitude and Phase Coupling. [PDF]

Adv Sci (Weinh)
A super‐resolution acoustic meta‐hologram utilizes amplitude‐phase coupling under energy conservation constraints to overcome the traditional diffraction limit. This conceptually advanced approach achieves high‐fidelity acoustic field reconstruction and dense information transmission, unlocking new potentials for high‐resolution acoustic imaging and ...
Guo X, Wang X, Tang G, Zeng H, Fan S, Hu X, Mo Y, He Z, Li T, Xu H, Shen J, Fan H, Gao X, Zhu Y, Zhang H, Assouar B.   +15 more
europepmc   +2 more sources

Effect of Systematic Errors on Building Component Sound Insulation Measurements Using Near-Field Acoustic Holography

Buildings
Near-field acoustic holography (NAH) provides an effective way to achieve wide-band, high-resolution visualization measurement of the sound insulation performance of building components. However, based on Green’s function, the microphone array’s inherent
Wei Xiong, Wuying Chen, Zhixin Li, Heyu Zhu, Xueqiang Wang   +4 more
doaj   +2 more sources

Construction and selection of a directivity wave function improving ill-condition problems in equivalent source method based near-field acoustic holography

AIP Advances, 2021
Sound-field reconstruction via the equivalent source method presents an ill-conditioned problem. This paper proposes a method in which traditional monopole equivalent source spherical wave functions are replaced with strong directional wave functions ...
Ziyu Shi, Yu Xiang, Jing Lu, Yujiang Wang, Yang Zhang   +4 more
doaj   +2 more sources

Variational Bayesian Compressive Sensing with Equivalent Source Modeling for Sound Field Reconstruction [PDF]

Sensors
While conventional Bayesian compressive sensing exploits signal sparsity for accurate sound field reconstruction from under-sampled measurements, its practicality is limited by high computational complexity and slow convergence.
Yue Xiao, Zhepu Chen, Haiyang Zhang, Chengping Zhong   +3 more
doaj   +2 more sources

Acoustic Tweezers-Assisted Biomaterial Molding in Petri Dishes (TAMP) for Engineering Glioma Tissues With Controlled Cellular and Extracellular Matrix Architectures. [PDF]

Small
This study introduces an acoustics‐assisted tissue engineering approach, termed “Acoustic Tweezers‐Assisted Biomaterial Molding in Petri Dishes (TAMP),” which enables the fabrication of tissues with customizable extracellular matrix (ECM) geometries and various acoustically constructed internal cellular architectures, including parallel elongated ...
Du Y, Li J, Liu H, Arroyo JP, Bo L, Cai B, Li T, Wang Z, Qiu C, Davalos R, Rich J, Tian Z.   +11 more
europepmc   +2 more sources