Aural Detection of Machinery Tones in Ship Noise. Open PDF Document Details Document Type Technical Report Publication Date Oct 17, 1961 Accession Number ADA054051 Entities People P. J. Perkins R. Halley Organizations Navy Electronics Laboratory Tags Communities of Interest Ground and Sea Platforms DTIC Thesaurus Topics Audio Frequency Classification Detection Filters Frequency Laboratory Procedures Measurement Noise Oscillators Passive Sonar Recording Systems Ship Noise Ships Sonar Sonar Targets Submarines Target Classification