In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 121, No. 5_Supplement ( 2007-05-01), p. 3055-3055
Abstract:
Undersea noise was collected on a vertical array affected by ocean currents and internal waves. Such fluctuations are known to negatively affect the accuracy of the inferred bottom loss over grazing angles [Arvelo and Prosperetti, J. Acoust. Soc. Am. 120, 3257 (2006)] . However, bottom loss is just an intermediate parameter to sonar performance predictions. The bottom loss at the dominant incident angles on the ocean floor is of most importance to the prediction of sound transmission. Therefore, the focus of attention should be on the effect of waveguide dynamics on the predicted acoustic propagation using the estimated bottom loss. Simultaneous transmission loss measurements are compared against predictions from several snapshots of collected element-level wind-driven noise to determine the bias and statistical moments associated with the in situ sonar performance estimations across frequency and range. In addition, dominant mode rejection will be applied on a subset of the data that is influenced by nearby ship interference to examine its impact on the robustness of this approach to passive environmental assessment. [This effort was conducted under the auspices of the JHU/APL independent research and development program.]
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
2007
detail.hit.zdb_id:
1461063-2
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