Abstract
Atmospheric turbulence and refraction have significant effects on acoustic signals. The signal coherence can be directly measured and can yield information for use in source localization and classification; however, the effects of turbulence and refraction decrease the accuracy of such efforts. The signal coherence of a broadband acoustic signal above an impedance ground in a refractive, turbulent atmosphere with spatial fluctuations in the temperature and wind velocity is modeled and the results for several atmospheric cases are considered.
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