scholarly journals Characterization of sound scattering using near-field pressure and particle velocity measurements

2019 ◽  
Vol 146 (4) ◽  
pp. 2404-2414
Author(s):  
Antoine Richard ◽  
Daniel Fernández Comesaña ◽  
Jonas Brunskog ◽  
Cheol-Ho Jeong ◽  
Efren Fernandez-Grande
Keyword(s):  
Particle Velocity ◽  
Near Field ◽  
Velocity Measurements ◽  
Sound Scattering

scholarly journals Patch near field acoustic holography based on particle velocity measurements

2009 ◽  
Vol 126 (2) ◽  
pp. 721-727 ◽  
Author(s):  
Yong-Bin Zhang ◽  
Finn Jacobsen ◽  
Chuan-Xing Bi ◽  
Xin-Zhao Chen
Keyword(s):  
Particle Velocity ◽  
Near Field ◽  
Velocity Measurements ◽  
Acoustic Holography

Experimental Characterization of a Car Window Excited by Turbulent Flow Using Scanning Sound Intensity Techniques

2012 ◽  
Author(s):  
Daniel Fernandez Comesaña ◽  
Eduardo Latorre Iglesias ◽  
Malcolm Smith ◽  
Hans-Elias de Bree
Keyword(s):  
Turbulent Flow ◽  
Particle Velocity ◽  
Automotive Industry ◽  
Sound Intensity ◽  
Aerodynamic Noise ◽  
Experimental Characterization ◽  
Velocity Measurements ◽  
Radiated Sound ◽  
Radiated Sound Power

Reducing the aerodynamic noise produced by turbulent flow exciting a car window is one of the current noise control challenges in the automotive industry. Flow separation and later reattachment into a turbulent boundary layer and turbulent wake occur because of flow over the A-pillar and the wing mirror. Experiments have been carried out to represent an idealised wing mirror noise problem using flow over a half cylinder exciting a flat plate. A scanning P-U (pressure-particle velocity) probe was used to measure various aspects of the window response and sound radiation, including the energy distribution of the vibrating surface, the total radiated sound power and hence the radiation efficiency. In addition, experimental results showed that the operational deflection shapes of the car window can be visualized by using scanning particle velocity measurements, obtaining similar results as with step-by-step measurements using a roving accelerometer. The scanning sound intensity maps also proved to be helpful for detecting weaknesses of the initial experimental setup as part of the experimental optimization.

Systematic Characterization of Dual Probes for Electromagnetic Near-field Measurement

2020 ◽  
pp. 1-1
Author(s):  
Weiheng Shao ◽  
Xinxin Tian ◽  
Rongquan Chen ◽  
Xiao He ◽  
Wenxiao Fang ◽  
...  
Keyword(s):  
Field Measurement ◽  
Near Field ◽  
Near Field Measurement

Near‐Field Characterization of Higher‐Order Topological Photonic States at Optical Frequencies

2021 ◽  
pp. 2004376
Author(s):  
Anton Vakulenko ◽  
Svetlana Kiriushechkina ◽  
Mingsong Wang ◽  
Mengyao Li ◽  
Dmitry Zhirihin ◽  
...  
Keyword(s):  
Near Field ◽  
Higher Order ◽  
Photonic States

Characterization of ultrafast devices using near-field optical heterodyning

2002 ◽  
Vol 12 (10) ◽  
pp. 369-371 ◽  
Author(s):  
M.E. Ali ◽  
K. Geary ◽  
H.R. Fetterman ◽  
S.K. Han ◽  
K.Y. Kang
Keyword(s):  
Near Field ◽  
Ultrafast Devices

Fabrication and characterization of fluorescent rare-earth-doped glass-particle-based tips for near-field optical imaging applications

2004 ◽  
Vol 43 (19) ◽  
pp. 3829 ◽  
Author(s):  
Lionel Aigouy ◽  
Yannick De Wilde ◽  
Michel Mortier ◽  
Jacques Giérak ◽  
Eric Bourhis
Keyword(s):  
Rare Earth ◽  
Optical Imaging ◽  
Near Field ◽  
Glass Particle ◽  
Fabrication And Characterization ◽  
Doped Glass ◽  
Rare Earth Doped ◽  
Rare Earth Doped Glass
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