ULTRASOUND PULSE ECHO METHOD AND APPARATUS FOR DETERMINING ACOUSTIC VELOCITY OF MATERIALS

摘要

A method and apparatus for determining directly the acoustic velocity cm of a material from the comparison of the ultrasonic pulse echoes obtained from the material positioned on the bottom surface of a fluid bath container with the ultrasonic pulse echoes received from the bottom of the bath container with the material removed therefrom. A cathode ray display apparatus incorporating an expandable pusle echo time base and a fixed calibrated acoustic velocity scale are employed for a direct reading from the scale of the acoustic velocity of the material.