摘要
在研究空气声源激发的水下声场时,通常假定空气为静止、均匀半空间,而没有考虑空气中实际声传播条件(风和声速剖面)的影响。在基于传播矩阵的快速场模型基础上,可得出计算运动介质中声传播的二维快速场模型FFP2DM,和远场近似条件下的一维快速场模型FFP1DM。用这两个模型,对空气中风和声速剖面对空气声透射入水的影响进行研究。结果表明:空气中风速剖面和声速剖面对空气中声传播有很大影响,但对于透射进入水中的声波影响很小。
Air layer is previously assumed to be a homogeneous, stationary media when the air- to-water sound transmission was involved. However it has been known that wind and the sound speed profile have great influence on the atmospheric sound propagation. To study its influence on air-to-water sound transmission, a two-dimensional fast field program model is derived using two- dimensional horizontal wave-number spectrum. To reduce the calculation burden of the two-dimensional FFP, a one-dimensional FFP is derived based on far field approximation. Using the derived models, the effect of wind and the sound speed profile on the sound transmission into the sea is studied. The results show that wind and the sound speed profile have little influence on air-to- water sound transmission.
出处
《声学技术》
CSCD
北大核心
2007年第2期211-216,共6页
Technical Acoustics
关键词
快速场
运动介质
空气声波透射入水
fast field program
air-to-water sound transmission
wind and sound speed profile
