Military jet noise source imaging using multisource statistically optimized near-field acoustical holography

2016 ◽  
Vol 139 (4) ◽  
pp. 1938-1950 ◽  
Author(s):  
Alan T. Wall ◽  
Kent L. Gee ◽  
Tracianne B. Neilsen ◽  
Richard L. McKinley ◽  
Michael M. James
Keyword(s):  
Noise Source ◽  
Near Field ◽  
Jet Noise ◽  
Source Imaging ◽  
Acoustical Holography

scholarly journals An Improved Algorithm for Noise Source Localization Based on Equivalent Source Method

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Zhongming Xu ◽  
Qinghua Wang ◽  
Yansong He ◽  
Zhifei Zhang ◽  
Shu Li ◽  
...  
Keyword(s):  
Source Localization ◽  
High Frequency ◽  
Noise Source ◽  
Near Field ◽  
Low Frequency ◽  
Equivalent Source ◽  
Source Method ◽  
Functional Equivalent ◽  
Acoustical Holography ◽  
Equivalent Source Method

Near-field acoustical holography (NAH) based on the equivalent source method (ESM) is an efficient method applied for noise source identification. Asl2-norm-based regularization cannot produce a satisfactory solution of the ill-conditioned problem in high frequency, the conventional ESM is restricted to relatively low frequency, and the resolution of conventional ESM in middle to high frequency remains a limitation open to investigation. This article presents an algorithm known as improved functional equivalent source method (IFESM), designed to enhance the resolution of conventional ESM. This method is developed in the framework of wideband acoustical holography (WBH) combining with functional beamforming (FB). Through numerical simulations, it is proved that the proposed method can localize noise with higher resolution compared with WBH and conventional ESM, and the ghosts on noise source map can be suppressed effectively. The validity and the feasibility of the proposed method are manifested by experiments including single-source and coherent-source localization.

Aperture extension for near-field acoustical holography applied to jet noise

2011 ◽  
Vol 130 (4) ◽  
pp. 2344-2344
Author(s):  
Alan T. Wall ◽  
Kent L. Gee ◽  
David W. Krueger ◽  
Tracianne B. Neilsen ◽  
Michael M. James
Keyword(s):  
Near Field ◽  
Jet Noise ◽  
Acoustical Holography

Full-spectrum near-field acoustical holography for fighter jet noise imaging

2018 ◽  
Vol 144 (3) ◽  
pp. 1671-1671
Author(s):  
Alan T. Wall ◽  
Kent L. Gee ◽  
Kevin M. Leete ◽  
Mylan R. Cook ◽  
Michael M. James
Keyword(s):  
Near Field ◽  
Jet Noise ◽  
Full Spectrum ◽  
Acoustical Holography

Aperture extension for near-field acoustical holography of jet noise

2013 ◽  
Author(s):  
Alan T. Wall ◽  
Kent L. Gee ◽  
David W. Krueger ◽  
Tracianne B. Neilsen ◽  
Scott D. Sommerfeldt ◽  
...  
Keyword(s):  
Near Field ◽  
Jet Noise ◽  
Acoustical Holography
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