9. Defect Characterization: Fundamentals
The presently used ultrasonic standard for calibrating ultrasonic systems is the "flat bottom hole." In view of some dissatisfaction by. many, we sought to apply the results of our scattering studies to explore the possibility of coming up with an alternative. This is a proposal for a new standard, and as I go through the discussion, please keep in mind that this work is still very much in its infancy.
Tittmann, Bernard R., "New Procedure for Calibrating Ultrasonic Systems For Quantitative NDE" (1977). Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE, July 1975–September 1976. 37.