在综合了回声法和频谱振幅比法优点的基础上，提出等效声阻抗法。
Based on synthesizing advantages of the pulse echo and spectral ration techniques, a new method, the equivalent acoustic impedance technique is proposed.
回顾了实验室中超声波测量Q值的四种常用方法：上升时间法、回声法、频谱振比法和波形反演法。
The four common ultrasonic methods for measuring Q value in the laboratory, rise time, pulse echo, spectral ration and waveform inversion techniques are reviewed.
怀特利表示：“我们的目标是理解经过N多年的进化后的蝙蝠的回声定位法的过程，以便能把类似的信号或技术用在我们的工程系统上。”
Whiteley said: 'We aim to understand the echolocation process that bats have evolved over millennia and employ similar signals and techniques in engineering systems.
不过，对测定目标物距离来说，声波运行的速度太慢，因此，声波回声测距法在实用中有其局限性。
Thus this soundwave echo method has its limitation in practical use.
“回声定位法”能自创影像。
他们同样发现病人也没有利用蝙蝠的回声定位法。
They also found no evidence that the patient was navigating by echolocation, the way that bats do.
这时，使用回声测深法将遇到困难。
In that case, it is difficult to apply the acoustic well-sounding(AWS)method.
还描述了用于提高采样频率的线形内插法和用于抑制分散回声的均值法。
This paper describes also the linear interpolation for the increase of the sampling frequency and the average method for the suppression of the scattering echoes.
这一方法被称为“回声定位法”，是一种借助物体产生的回声来识别其方位的方法。
It's called 4 echolocation, a technique that USES sound to identify objects by the echoes they produce.
只需经过几周的训练，你便能像海豚和蝙蝠一样通过回声定位法在黑暗中“看见”物体。
With just a few weeks of training, you can learn to "see" objects inthe dark using echolocation the same way dolphins and bats do.
只需经过几周的训练，你便能像海豚和蝙蝠一样通过回声定位法在黑暗中“看见”物体。
With just a few weeks of training, you can learn to "see" objects inthe dark using echolocation the same way dolphins and bats do.
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