LOW FREQUENCY DETECTORS OF UNDERWATER SOUND Open PDF Document Details Document Type Technical Report Publication Date Apr 20, 1954 Accession Number AD0032197 Entities People S. N. Heaps Tags Communities of Interest Energy and Power Technologies Ground and Sea Platforms Weapons Technologies DTIC Thesaurus Topics Acoustic Detectors Acoustic Equipment Acoustic Velocity Acoustic Waves Acoustics Audio Frequency Barium Titanates Detectors Elastic Properties Elements Frequency Frequency Bands Geophones Hydrophones Impedance Intensity Underwater Sound