Wright T M, Carr J M
J Biomech Eng. 1983 Feb;105(1):20-3. doi: 10.1115/1.3138379.
The soft tissue attenuation of acoustic emission signals was measured by transmitting pulses through volunteers and measuring the decay of the waveform characteristics of the pulse as a function of the thickness of the interposed tissue. Waveform characteristics of the received signal (signal duration, number of counts, peak amplitude, energy, and rise time) demonstrated an exponential decrease with increasing tissue thickness. The decrease appeared insensitive to the frequency of the pulse within the range of 50 to 600 KHz.
通过向志愿者发射脉冲，并测量作为插入组织厚度函数的脉冲波形特征的衰减，来测量声发射信号的软组织衰减。接收信号的波形特征（信号持续时间、计数数量、峰值幅度、能量和上升时间）显示随着组织厚度增加呈指数下降。在50至600千赫兹范围内，这种下降对脉冲频率似乎不敏感。
