The Effect of Turbulent Intermittency on Detection in Acoustic Shadows.
ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM
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This report discusses the effect of turbulent intermittency the tendency of turbulence to occur in bursts or activity on large angle acoustic scattering and source detection and shows how intermittency increases the occurrence of high intensity scattering events. Source detection probabilities strongly depend on the occurrence of these events, as well as the noise background characteristics. Detection probability calculations are made for a variety of noise scenarios. Intermittency increases the detection probabilities by several orders of magnitude if the signal-to-noise ratio SNR is low and the noise background has relatively little variance. The intermittency effect becomes less significant in high SNR situations and highly variable noise environments. This report also discusses estimation of the parameters required by the intermittency theory from standard micrometeorological measurements.
- Acoustic Detection and Detectors