Abstract
In this study, the acoustic wave reflection characteristics from the surface of water-saturated and air-saturated sediments are calculated using the Biot-Stoll model. These sediments are silt and medium sand. The calculated results for the water-saturated and the air-saturated silt and medium sand are compared. Additionally the reflection characteristics from the surface of sediments with the top transition layer are obtained using OASES (Biot-Stoll model). The effects of the transition layer depending on the frequency are investigated. Moreover, the effects of the slow wave in the air-saturated sediment on the reflection characteristics are considerd.