Areal sound intensity receiver

Details Areal sound intensity receiver Areal sound intensity receiver

1990-02-20

1990-09-04

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

367129, 73646, G01S 380, G01H 312

Patent

active

049550012

ABSTRACT:
A system of three or more hydrophone arrays are utilized to measure underwater areal sound intensity. The hydrophone arrays bound at least one plane through which an areal sound intensity measurement is desired. Each hydrophone array comprises three orthogonal pairs of hydrophones with coincident acoustic centers. The output of each hydrophone in the system is simultaneously sampled and the outputs processed to obtain a vectorial sound intensity representation at each of the hydrophone arrays from which a representation of the areal sound intensity across the noted plane may be derived.

REFERENCES:
patent: 4119942 (1978-10-01), Merklinger
patent: 4620445 (1986-11-01), McKendree
Rasmussen, Gunnar et al., "Intensity Measurements" Inter-Noise 83, 1983.
Rasmussen, Gunnar "Measurement of Vector Fields" Senlis, 1985.
Guigne, J. Y. et al., "A Concept for the Detection of Fatigue Cracks in Welded Steel Nodes" Marine Technology, vol. 18 (1987) No. 4.
Guigne, J. Y. et al., "Detection of In-Service Fatigue Damage in Offshore Structures Using Dynamic Acoustic Intensity Scanning" Non-Destructive Testing (Proc. 12th World Conference), Apr. 1989, pp. 478-483.
Guigne, J. Y. et al., "Acoustical Imaging Using a DAIS Technique for Non-Destructive Testing" Acoustical Imaging, vol. 17, 1989, pp. 237-246.

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