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April, 1930] MOTION PICTURE ARTS AND SCIENCES 439
He was followed by Dr. Vern O. Knudsen, associate professor of physics at the University of California at Los Angeles, and vice^ president of the Acoustical Society of America, who discussed the nature of speech and hearing and architectural acoustics.
Three men are taking part in a lecture devoted to recording sound for motion pictures, covering briefly the various methods of recording. Dr. Donald MacKenzie, technical service engineer for Electrical Research Products, Inc., will give the general principles of the Western Electric System. This will be amplified in so far as the Fox-Case method is concerned by E. H. Hansen, who was an expert with the FoxCase Company previous to his present association as operating head of the Fox Studios sound department. The features of the RCA Photophone System will be explained by Ralph Townsend, supervising engineer for RCA Photophone studios on the west coast.
Reproduction in the theater will be discussed by S. K. Wolf, theater acoustics engineer for Electrical Research Products, Inc., of New York, and by John O. Aalberg, engineer in charge of reproduction in RCA Photophone studios.
The possibilities of acoustical control in recording and reproduction will be outlined by J. P. Maxfield, recording engineer for Electrical Research Products, Inc.
The subject of re-recording will be taken up by Kenneth F. Morgan, supervising engineer of the recording department of Electrical Research Products. This talk will precede a comparative discussion of film and disk recording by Nugent H. Slaughter, chief engineer in charge of recording for Warner Brothers Vitaphone productions, and Albert W. De Sart, technical director for ParamountFamous-I/asky Studios.
The two final meetings will be devoted to practical problems in recording and reproduction, including demonstrations in the different studios. In these lectures four men will take part: Douglas Shearer, recording engineer in charge of the sound department at Metro-Goldwyn-Mayer Studios; John K. Hilliard, sound director at United Artists Studios ; C. Roy Hunter, sound director at Universal Studios; and L. E. Clark, technical director of sound at Pathe Studios.
Roy J. Pomeroy, a pioneer sound director who is credited with installing the first sound-on-film equipment in Hollywood, will discuss the future of sound in motion pictures.