Abstract
A method of measuring leaky Rayleigh wave velocity precisely has been developed with a line-focused PVDF ultrasonic transducer and a digital signal processing. A focused PVDF ultrasonic transducer is constructed by cementing PVDF film on a concave surface. The measurement system is composed of an ultrasonic pulser/receiver, a high-speed digital wave memory and a personal computer. The relative precision of the measurement for the leaky Rayleigh wave velocity of fused silica, the standard deviation divided by the mean velocity, is 10-4. PVDF ultrasonic transducers have broad band width, therefore, leaky creeping wave and surface SV wave are clearly identified and these wave velocities have been measured simultaneously.
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