P043

An Experimental Model of Surface Reflection in the Anechoic Underwater

Basin at KRISO

A0105 Sea-Moon Kim Korea Research Institute of Ships and Ocean Engineering (KRISO), KORDI

A0106 Chong-Moo Lee Korea Research Institute of Ships and Ocean Engineering (KRISO), KORDI

A0107 Jong-Won Park Korea Research Institute of Ships and Ocean Engineering (KRISO), KORDI

A0108 Young-Choi Choi Korea Research Institute of Ships and Ocean Engineering (KRISO), KORDI

A0109 Yong-Kon Lim Korea Research Institute of Ships and Ocean Engineering (KRISO), KORDI

Wave propagations in the oceans are highly dependent on the geometry

of the oceans as well as the spatial distributions of temperature,

pressure, and salinity in the media. Waves are refracted due to

spatial variation of the media properties, reflected by free surfaces

and bottoms, and scattered by small floating particles. These

phenomena make it difficult to identify original signals during

acoustic communication. Above all things, the reflections form multi-

paths between source and receiver points and have the significant

effects on the signal distortion. In this research, a surface

reflection model is investigated by an experimental approach. The

experiments were performed in the KRISO anechoic underwater basin.

During the experiments we changed source location and its frequency

characteristics to identify the reflection phenomena in space and

frequency domains.