spherical-earth attenuation

In view of the fact that seismic amplitude attenuation varies with the absorp-tion of different frequency contents, and based on wavelet transform theory, we put forward a new processing method for compensating spherical divergence and ab-sorption in the time-frequency domain.

根据地震波振幅衰减随不同的频率成分有不同的吸收衰减特点，本文基于小波变换理论，提出了时频域球面发散和吸收补偿的处理方法。

Influence of parameters such as attenuation coefficient, velocity of sound, and temperature of medium on focusing sound field generated by a self-focused concave spherical radiator has been studied through numerical simulation with Ray-leigh integral.

以凹球面自聚焦超声换能器为例，用瑞利积分进行数值模拟计算，研究声衰减、声速、温度等参数对声聚焦的影响，并对不同生物组织中声聚焦的特点进行了比较。