【作者】 李倩宇； 陶春辉； 周建平； 张国堙； 王奡； 李红星；

【Author】 LI Qianyu;TAO Chunhui;ZHOU Jianping;ZHANG Guoyin;WANG Ao;LI Hongxing;School of Geophysics and Measurement-Control Technology,East China University of Technology;Second Institute of Oceanography,State Oceanic Administration;Key Laboratory of Submarine Geosciences,State Oceanic Administration;Insitute of Geophysics and Geomatics,China University of Geosciences (Wuhan);

【机构】 东华理工大学地球物理与测控技术学院； 国家海洋局第二海洋研究所； 国家海洋局海底科学重点实验室； 中国地质大学(武汉)地球物理与空间信息学院；

【摘要】 声学原位测量能够获得原始环境下海底沉积物原始状态的声学特性参数,声学原位数据后续的处理工作也是不可忽视的。而海洋环境的复杂程度,并不低于地表环境的复杂程度,初至拾取在其中就显得尤为重要。本文将长短时窗均值法（STA/LTA）用于声学原位信号初至拾取中,通过采用STA/LTA对声学原位信号进行自动拾取,获取声学原位信号更加有效的振幅信息,发现当特征函数CF₂（i）=Y（i）²,并且N_LTA=300,N_STA=50时拾得初至的准确度最高,为之后精确计算原位声速及声衰减奠定了基础。更多还原

【Abstract】 In-situ acoustic measurement can obtain acoustic characteristics of the seafloor sediment in the original environment.The subsequent processing of in-situ acoustic data cannot be ignored.The complexity of the marine environment is not less than the surface environment,and it is particularly important to the first arrival picking.By using the short term averaging/long term averaging（STA/LTA）algorithm for automatic picking of the in-situ acoustic signal to obtain more efficient amplitude information,it was found that the feature function CF₂（i）=Y（i）²,N_LTA=300,N_STA=50 can get the most accuracy of the first arrival.It lays the foundation for accurate calculation of in situ acoustic velocity and attenuation afterwards.更多还原