Modeling Acoustic Propagation in Littoral and Surf-zone Regions

This proposal describes research effort by faculty of the Catholic University of America (CUA) and East Carolina University (ECU) related to developing a mid-range atmospheric sound propagation model for littoral environments. This model is intended to be used for predicting the detectability of Naval platforms by on-shore receivers. This proposal consists of a critical preliminary step to fully understand the requirements for developing this platform. The objective of this proposed work is to develop a model based on the sonar equation that uses meteorological information (atmospheric conditions and sea state data) to predict excess attenuation as a function of range. During the period of this research the team will build a model for excess attenuation in the specific case of intermediate range propagation above the ocean surface. This information, along with source level, as well as the ambient noise level at the receiver can be used to predict platform detectability. This proposal addresses only the model for excess attenuation.

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