Results 31 to 40 of about 9,260,103 (204)

Sound Field Reconstruction Using Prolate Spheroidal Wave Functions and Sparse Regularization

Sensors, 2023
Near-field acoustic holography (NAH) based on compressing sensing (CS) theory enables accurate reconstruction of sound fields using a limited number of sampling points.
Xuxin Zhang, Jingjun Lou, Shijian Zhu, Jinfang Lu, Ronghua Li   +4 more
doaj   +1 more source

A Cylindrical Near-Field Acoustical Holography Method Based on Cylindrical Translation Window Expansion and an Autoencoder Stacked with 3D-CNN Layers

Sensors, 2023
The performance of near-field acoustic holography (NAH) with a sparse sampling rate will be affected by spatial aliasing or inverse ill-posed equations.
Jiaxuan Wang, Weihan Zhang, Zhifu Zhang, Yizhe Huang   +3 more
doaj   +1 more source

CHARACTERIZATION OF SCATTERING USING NEAR-FIELD ACOUSTIC HOLOGRAPHY

NOISE CONTROL - THE NEXT 25 YEARS
M KLEINER, P SVENSSON
openaire   +2 more sources

Scan and paint: theory and practice of a sound field visualization method [PDF]

, 2013
Sound visualization techniques have played a key role in the development of acoustics throughout history. The development of measurement apparatus and techniques for displaying sound and vibration phenomena has provided excellent tools for building ...
Carrillo Pousa, Graciano, Fernandez Comesana, Daniel, Steltenpool, Steven, Holland, Keith R., de Bree, Hans-Elias   +4 more
core   +1 more source

Identification and contribution analysis of vehicle interior noise based on acoustic array technology

Advances in Mechanical Engineering, 2017
This article proposes an advanced far-field acoustic hologram for vehicle sound source identification and investigates a method of performing contribution analyses in the far field.
Bao Guozhi, Shao Guangsheng, Xia Zhaowang, Den Jianghua   +3 more
doaj   +1 more source

Nearfield Acoustical Holography Research & Application On Compressor & Refrigerator [PDF]

, 2012
In this paper, an algebraic formulation which expresses the dimensionless rate of entropy generation as a function of the heat exchanger geometry (number of transfer units), the thermal-hydraulic characteristics (friction factor and Colburn j-factor ...
Jianwen, Xu, Fagotti, Fabian, Jiang, Weikang   +2 more
core   +1 more source

Measurement of airborne sound insulation of building components by near-field acoustic holography

INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 2023
Unmanned aerial vehicles (UAVs) are currently being used for reconnaissance missions, tactical surveillance, and infrastructure inspection. When legislation allows it, these devices will provide additional services close to inhabited areas, which could ...
F. Simon, N. Schiller, Nicole A. Pettingill, Nicolas Zawodny, Matthew B. Galles   +4 more
semanticscholar   +2 more sources

Bearing Fault Diagnosis Based on Spatial Features of 2.5 Dimensional Sound Field

Shock and Vibration, 2019
The traditional acoustic-based diagnosis (ABD) technique based on single-channel testing has a significant engineering value. Since its diagnosis robustness is sensitive to sound signal acquisition location, it develops slowly. To solve this problem, the
Junjian Hou, Jun Ma, Zhanpeng Fang, Wuyi Ming, Wenbin He   +4 more
doaj   +1 more source

A New Method for Determining Optimal Regularization Parameter in Near-Field Acoustic Holography

Shock and Vibration, 2018
Tikhonov regularization method is effective in stabilizing reconstruction process of the near-field acoustic holography (NAH) based on the equivalent source method (ESM), and the selection of the optimal regularization parameter is a key problem that ...
Yue Xiao
doaj   +1 more source

Research on patch near-field acoustic holography based on two-level iteration [PDF]

, 2020
In order to solve the “window effect” and “aperture repetition effect” caused by limited measurement aperture, a patch near-field acoustic holography method based on two-level iteration is proposed. After analyzing the principle and process of patch near-
Gaoquan Gu, Jing Zhang
core   +1 more source