中文摘要：

介绍了单参数模型,提出以小掠射角下反射损失随掠射角的变化率Fd B作为描述海底性质的单参数,并分析研究了该海底单参数模型的适用性,分析得到,当频率不低于数十赫兹且海底沉积物类型属于高声速海底时,单参数模型可以用来描述海底性质。还研究了海水声速对于海底单参数模型描述水下声场的适用性的影响,结果表明,当海水声速剖面可以近似等效为均匀水层时,可用海底单参数模型对水下声场进行预报应用。

英文摘要：

A single parameter seabed model is introduced in this paper, the slope of bottom loss versus grazing angle FdB （dB/radian） is proposed as the single parameter to describe the characteristics of sea bottom. The suitability of the single parameter seabed model is discussed. The single parameter model could be applied to describe the properties of high speed seabed when the frequency is more than tens of Hertz. The model’s applicability for underwater acoustic field prediction is also analyzed. The results show that when the sound speed profile could be equivalent to the homogeneous profile, the single parameter seabed model can be applied to predicting the underwater acoustic field.