Study of Communication in High-Level Ambient Noise Fields Open PDF Document Details Document Type Technical Report Publication Date Feb 15, 1956 Accession Number AD0093006 Tags Communities of Interest Human Systems Materials and Manufacturing Processes DTIC Thesaurus Topics Acoustic Equipment Amplifiers Armored Vehicles Communication Systems Contractors Contracts Earphones Engineers Environment Government Procurement Governments Hearing Loss Identification Intelligibility Microphones Noise Speech