Measurement Of Sound Speed By Extracting The Time Delay, Using Miniprobe Transducer

This work attempts to measure the sound speed in objects by extracting the time delay of the system. In biological tissues, the accurate determination of the propagation path length is very difficult due to the highly irregular shape of the tissues. The accuracy in measuring the propagation path length will patly affect the accuracy of measurement of the speed of sound in the tissues. In order to overcome this problem. a pair of miniprobe rmnsducers [I, 21 was fabricated at the tips of a variable path caliper to fix and measure the path length with 0.05(mm) in accuracy. Methods to develop the measurement of the sjmd of sound by extracting the time delay of the system are proposed. Sound speed in some materials have been measured using the proposed methods as preliminary to the measurement of sound speed in biological tissues.