Near‐field acoustical holography in cylindrical spaces

This paper suggests the use of rigid reflectors to provide additional information for source reconstruction in near-field acoustical holography based on the inverse boundary element method. The additional field pressure and transfer matrix equations introduced provide a virtual increase in the measurement data without increasing the number of sensors or altering their arrangement, which could cost more than using reflectors. In order to validate this method, we successfully reconstruct a vibrating ellipse.

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Application of cylindrical near-field acoustical holography to the visualization of aeroacoustic sources

The Journal of the Acoustical Society of America ◽

10.1121/1.1587735 ◽

2003 ◽

Vol 114 (2) ◽

pp. 842-858 ◽

Cited By ~ 10

Author(s):

Moohyung Lee ◽

J. Stuart Bolton ◽

Luc Mongeau

Keyword(s):

Near Field ◽

Acoustical Holography

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Determination of the directivity of a planar noise source by means of near field acoustical holography, 2: numerical simulation

Journal of Sound and Vibration ◽

10.1006/jsvi.1995.0070 ◽

1995 ◽

Vol 180 (1) ◽

pp. 119-142 ◽

Cited By ~ 1

Author(s):

M.A. Rowell ◽

D.J. Oldham

Keyword(s):

Numerical Simulation ◽

Noise Source ◽

Near Field ◽

Acoustical Holography

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Effects of Quay Wall and Seabed Reflection on the AUV Acoustic Radiation Test Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.599-601.922 ◽

2014 ◽

Vol 599-601 ◽

pp. 922-926

Author(s):

Guo Liang Xu ◽

Qi Wei He ◽

Shao Chun Ding ◽

Hai Bo Wan

Keyword(s):

Acoustic Field ◽

Field Test ◽

Sound Pressure ◽

Acoustic Radiation ◽

Near Field ◽

Test Analysis ◽

Complex Sound ◽

Quay Wall ◽

Radiation Test ◽

Acoustical Holography

To analyze effects of quay environment on the AUV radiated acoustic field test, the PNAH (PNAH: planar near-field acoustical holography) was used to simulate acoustic field. By simulating the free and non-free acoustic field and comparing amplitudes and angles of complex sound pressure, Analyze effects of quay wall and seabed reflection on the AUV radiated acoustic field test to determine the standard of quay wall and seabed environment which meets testing. The work would provide a certain reference for the AUV radiated acoustic field test.

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