Membrane-sonic method 薄膜超声分散法
ultra-sonic method of liquid meaduremert 超音波法液位元元元元元元测定
density-sonic crossplot method 密度
sonic location method 声波测位法
sonic test method 涡流声检测法
sonic log method 声波测井方法
The paper introduces a kind of sonic method by which frequency of impacter is measured.
介绍了一种声波法测冲击器频率的方法。
The result of analogue test shows that frequency of impacter measured by sonic method consists with actual frequency and the method is feasible.
模拟试验结论表明，声波法测出的冲击频率与实际频率是一致的，具有可行性。
Of all the factors influencing sonic booms, increasing altitude is the most effective method of reducing sonic boom intensity.
在所有影响音爆的因素中，提高飞行高度是减弱音爆的最有效措施。
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