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Narrow-band source localization in the presence of internal waves for 1000-km range and 25-Hz acoustic frequency

Publication ,  Journal Article
Book, PJ; Nolte, LW
Published in: Journal of the Acoustical Society of America
March 1, 1997

The effects of internal waves on low-frequency (25 Hz) narrow-band source localization performance are investigated at a very long range (1000 km). Sound-speed perturbations induced by internal waves obeying the Garrett- Munk spectral model are incorporated into the normal mode solution to the wave equation using the adiabatic approximation. Sensitivity of source localization on the internal wave modal content is examined. For the entire range of signal-to-noise ratios (SNR) and degrees of internal-wave field structure, the optimal uncertain field processor (OUFP) provides both the signal processing algorithm as well as the limitations on source localization performance. For high SNR, the localization errors are local and the performance level of the OUFP is predicted by the hybrid Cramer-Rao lower bound (CRLB). In fairly structured internal-wave environments, significant performance gains are made optimally localizing the source. Under very random internal-wave environments, the environmental variability limits the performance of all signal processing algorithms.

Duke Scholars

Published In

Journal of the Acoustical Society of America

DOI

ISSN

0001-4966

Publication Date

March 1, 1997

Volume

101

Issue

3

Start / End Page

1336 / 1346

Related Subject Headings

  • Acoustics
 

Citation

APA
Chicago
ICMJE
MLA
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Book, P. J., & Nolte, L. W. (1997). Narrow-band source localization in the presence of internal waves for 1000-km range and 25-Hz acoustic frequency. Journal of the Acoustical Society of America, 101(3), 1336–1346. https://doi.org/10.1121/1.418161
Book, P. J., and L. W. Nolte. “Narrow-band source localization in the presence of internal waves for 1000-km range and 25-Hz acoustic frequency.” Journal of the Acoustical Society of America 101, no. 3 (March 1, 1997): 1336–46. https://doi.org/10.1121/1.418161.
Book PJ, Nolte LW. Narrow-band source localization in the presence of internal waves for 1000-km range and 25-Hz acoustic frequency. Journal of the Acoustical Society of America. 1997 Mar 1;101(3):1336–46.
Book, P. J., and L. W. Nolte. “Narrow-band source localization in the presence of internal waves for 1000-km range and 25-Hz acoustic frequency.” Journal of the Acoustical Society of America, vol. 101, no. 3, Mar. 1997, pp. 1336–46. Scopus, doi:10.1121/1.418161.
Book PJ, Nolte LW. Narrow-band source localization in the presence of internal waves for 1000-km range and 25-Hz acoustic frequency. Journal of the Acoustical Society of America. 1997 Mar 1;101(3):1336–1346.

Published In

Journal of the Acoustical Society of America

DOI

ISSN

0001-4966

Publication Date

March 1, 1997

Volume

101

Issue

3

Start / End Page

1336 / 1346

Related Subject Headings

  • Acoustics