Results 161 to 170 of about 558 (180)

Partial source discrimination in near field acoustic holography

Applied Acoustics, 1999
Abstract Decomposition techniques based on principal component analysis (PCA) and partial coherent output power (PCOP) analysis are applied to scanning near field acoustic holography (NAH) in order to identify partial sources. Where location of partial sources is uncertain, inaccessible, or the underlying physical process is not well understood ...
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Near-Field Acoustic Holography of Cyclostationary Sound Field

Advanced Materials Research, 2013
The radiated sound field of rotating machinery or reciprocating machinery has a significant periodically time-variant nature. This is a kind of non-stationary sound field and called cyclostationary sound field. In the conventional planar near-field acoustic holography(PNAH), this kind of sound field is treated as stationary field, so the information ...
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A 3D convolutional neural network based near-field acoustical holography method with sparse sampling rate on measuring surface

Measurement: Journal of the International Measurement Confederation, 2021
Zhifu Zhang, Jiaxuan Wang
exaly  

Development of Near-Field Acoustic Holography

Applied Physics, 2018
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Near-field acoustical holography and acoustic power analysis of a simulated, highly heated supersonic jet

Journal of the Acoustical Society of America, 2022
Kent Gee, Kevin Leete, Junhui Liu
exaly  

Research on joint training strategy for 3D convolutional neural network based near-field acoustical holography with optimized hyperparameters

Measurement: Journal of the International Measurement Confederation, 2022
Zhifu Zhang, Jiaxuan Wang
exaly  

Underwater moving noise source identification based on hybrid near-field acoustical holography

Science China: Physics, Mechanics and Astronomy, 2011
Shengguo Shi, Bo Hu, Desen Yang
exaly  

Basic theory and properties of statistically optimized near-field acoustical holography

Journal of the Acoustical Society of America, 2009
Jørgen Hald, Hald Jørgen
exaly  

Near-field acoustical holography in cylindrical spaces

The Journal of the Acoustical Society of America, 1993
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Underwater hybrid near-field acoustical holography based on the measurement of vector hydrophone array

Science China: Physics, Mechanics and Astronomy, 2010
Bo Hu, Desen Yang, Yang Desen
exaly