DEVELOPMENT OF LOW FREQUENCY UNDERWATER SOUND EQUIPMENT Open PDF Document Details Document Type Technical Report Publication Date Jun 25, 1954 Accession Number AD0033836 Entities People R. L. Mills Tags Communities of Interest Advanced Electronics Energy and Power Technologies Ground and Sea Platforms DTIC Thesaurus Topics Acoustic Equipment Acoustic Impedance Acoustic Propagation Acoustics Amplitude Contracts Detection Detectors Electron Tubes Field Tests Impedance Intensity Measurement Sound Waves Test And Evaluation Underwater Sound Waves