... echo ranging 回波测距法，回声测距法 echo reverberation ratio 混响比 echo "rings" 回声振荡 ...
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The range and depth dependence of the long-range reverberation and echo-reverberation ratio were calculated for the cases of negative gradient and homogeneous layers.
用该法在浅海负梯度和均匀层情况下，计算了远程混响和回波、混响比的距离、深度结构。
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