GEOMETRY OF HIDDEN DEFECTS DETERMINED BY ULTRASONIC PULSE ANALYSIS AND SPECTROSCOPY Open PDF Document Details Document Type Technical Report Publication Date Dec 01, 1962 Accession Number AD0296033 Entities People Otto R. Gericke Tags Communities of Interest Biomedical Weapons Technologies DTIC Thesaurus Topics Air Force Barium Titanates Carrier Frequencies Engineering Frequency Jet Propulsion Materials Military Research Munitions New Jersey Ordnance Laboratories Spectroscopy Test And Evaluation Test Methods Ultrasonic Frequencies Ultrasonic Tests Ultrasounds