This report is one of a regular series on the status and progress of studies on the nature of speech, instrumentation for its investigation, and practical applications. The reports contained in this particular number are state-of-the-art reviews of work central to the Haskins Laboratories' areas of research. The papers included are: (1) "Phonetics: An Overview," (2) "The Perception of Speech," (3) "Physiological Aspects of Articulatory Behavior," (4) "Laryngeal Research in Experimental Phonetics," (5) "Speech Synthesis for Phonetic and Phonological Models," (6) "On Time and Timing in Speech," and (7) "A Study of Prosodic Features." (Author)