Microprocessors and micro-controllers have been extensively put to use by researchers to acquire, process and display experimental data in user- defined form. Hence, conventional instrumentation is being replaced by PC-based instrumentation, by effectively utilizing the processing power and software capabilities of a microprocessor. Low amplitude ultrasonic propagation is powerful and effective method to probe the properties of a medium since the properties of the medium do not change during the propagation. Thus, ultrasonic techniques have been extensively used as a basic non- destructive...