1983年10月,作者在南海首次进行了深水散射层的实验。这项实验是采用遥测的方法进行的,实验时分别在两种深度上投放定深信号弹,同时在这两个深度上用无方向性水听器接收混响信号。本文对现场实测的体积混响信号进行了计算,求得了该海区深水散射层的层深、层厚、层强度以及平均反向体积散射系数,由此估计出该海区的散射层是由尺寸为几厘米的有鳔鱼群体构成。 In October 1983, the author conducted the first deepwater scattering experiment in the South China Sea. The experiment was conducted using a telemetry method where deep signal flares were deployed at two depths and reverberation signals were received at both depths using a non-directional hydrophone. In this paper, the measured volume reverberation signals were calculated and the depth, thickness and strength of the deepwater scattering layer in the sea area and the average backscattering coefficient were obtained. It is estimated that the scattering layer in the sea area is composed of A few centimeters are composed of catfish group.