Periodic Status Report Number 38, 16 May-1 December 1961 Open PDF Document Details Document Type Technical Report Publication Date Dec 01, 1961 Accession Number AD0268471 Entities Organizations Harvard University Tags Communities of Interest Biomedical DTIC Thesaurus Topics Acoustics Brightness Contracts Contrast Discontinuities Ear End Organs Frequency Government Procurement Hearing Intensity Loudness Measurement New York Psychology Sensation Sound Pressure