SOUND TRANSMISSION AT SAN JUAN, PUERTO RICO Open PDF Document Details Document Type Technical Report Publication Date Oct 01, 1953 Accession Number AD0021402 Entities People A. N. Guthrie H. H. Loar H. L. Poss R. A. Frosch Organizations Columbia University Tags Communities of Interest Air Platforms Energy and Power Technologies DTIC Thesaurus Topics Deep Water Detection Doppler Effect Dual Channel Explosive Charges Frequency Hydrophones Instrumentation Intensity Measurement National Security Puerto Rico Ray Tracing Recording Systems Reflection Security Sound Transmission