A NOVEL METHOD FOR THE MEASUREMENT OF ACOUSTIC SPEED
A NOVEL METHOD FOR THE MEASUREMENT OF ACOUSTIC SPEED
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DOI：
10.1121/1.400242
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发表时间：
1990-10-01
影响因子：
2.4
通讯作者：
SHUNG, KK
中科院分区：
文献类型：
--
作者：
KUO, IY;HETE, B;SHUNG, KK
传统的声速测量方法需要知道样品的厚度或换能器与样品之间的距离。一般来说，测量这些量的准确性决定了测量速度的实验技术的准确性。在测量生物样品的声速时，这个问题尤其严重。一种测量材料声速的新方法已经开发出来，它消除了测定这些量的需要。这项技术只需要使用一个换能器，需要测量声脉冲的四次飞行，并需要知道样品所在的参考流体介质中的声速。用该方法测量了不锈钢和有机玻璃的声速，验证了该方法的有效性。还报道了对猪肝脏、心肌和软脂肪的测量结果。
Traditional methods for measuring acoustic speed require knowledge of either the specimen thickness or the distances between the transducers and the specimen. In general, the accuracy in measuring these quantities determines the accuracy of the experimental technique for measuring speed. This problem is particularly acute in measuring sound speed in biological specimens. A new method for measuring acoustic speed of materials, which eliminates the need for determining these quantities, has been developed. The technique, which necessitates the use of only one transducer, requires measurement of four times of flight of a sound pulse and the knowledge of the speed of sound in a reference fluid medium in which the specimen is placed. Ultrasonic speed in stainless steel and Plexiglas was measured using this method to verify its validity. Results on measurements on porcine liver, myocardium, and soft fat are also reported.