Speech Privacy Decoding. Parts 1 and 2 Open PDF Document Details Document Type Technical Report Publication Date Jan 01, 1942 Accession Number ADA800127 Entities People R. A. Heising Tags Communities of Interest Energy and Power Technologies DTIC Thesaurus Topics Carrier Frequencies Circuits Compressors Decoding Electrical Circuits Elements Frequency Frequency Bands Language Machines Magnetic Tape National Security Power Supplies Recording Systems Sidebands Tape Recorders Tape Recording