火山岩地震反射特征主要为强振幅、视低频，而且连续性差。
The seismic reflection characteristics of volcanic rocks are mostly strong amplitude, apparent low frequency and the continuity is bad.
当桩身缺陷位于一维“盲区”范围时，反射波波形畸变，并呈强振幅，低频率之特征。
When the defect of pile body is located at the range of one - dimensional blind areas, the wave form of the reflected wave distorts and shows the characteristics of strong amplitude and low frequency.
针对浅层气藏天然气富集带预测的关键技术是“低频强振幅”地震响应亮点识别技术；
The key technology for prediction of prolific zone in the shallow gas reservoirs is bright spot identification of seismic response with "low frequency but strong amplitude";
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