Bi-static sonar applications of intensity processing

Nathan K. Naluai, Gerald C. Lauchle, Thomas B. Gabrielson, John H. Joseph

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Acoustic intensity processing of signals from directional sonobuoy acoustic subsystems is used to enhance the detection of submerged bodies in bi-static sonar applications. In some directions, the scattered signals may be completely dominated by the incident blast from the source, depending upon the geometry, making the object undetectable by traditional pressure measurements. Previous theoretical derivations suggest that acoustic vector intensity sensors, and the associated intensity processing, are a potential solution to this problem. Deep water experiments conducted at Lake Pend Oreille in northern Idaho are described. A large, hollow cylindrical body is located between a source and a number of SSQ-53D sonobuoys positioned from 5 to 30 body lengths away from the scattering body. Measurements show changes in the acoustic pressure of less than 0.5 dB when the scattering body is inserted in the field. However, the phase of the acoustic intensity component formed between the acoustic pressure and particle velocity component orthogonal to the direction of incident wave propagation varies by as much as 55° . This metric is shown to be a repeatable and strong indicator of the presence of the scattering body.

Original languageEnglish (US)
Pages (from-to)1909-1915
Number of pages7
JournalJournal of the Acoustical Society of America
Volume121
Issue number4
DOIs
StatePublished - Apr 13 2007

Fingerprint

sonar
acoustics
sonobuoys
submerged bodies
scattering
cylindrical bodies
deep water
blasts
pressure measurement
lakes
Acoustics
wave propagation
hollow
derivation
sensors
geometry

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Naluai, Nathan K. ; Lauchle, Gerald C. ; Gabrielson, Thomas B. ; Joseph, John H. / Bi-static sonar applications of intensity processing. In: Journal of the Acoustical Society of America. 2007 ; Vol. 121, No. 4. pp. 1909-1915.
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Bi-static sonar applications of intensity processing. / Naluai, Nathan K.; Lauchle, Gerald C.; Gabrielson, Thomas B.; Joseph, John H.

In: Journal of the Acoustical Society of America, Vol. 121, No. 4, 13.04.2007, p. 1909-1915.

Research output: Contribution to journalArticle

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