DocumentCode :
992394
Title :
The Electrical Engineering of Sound Picture Systems
Author :
Morgan, K.F. ; Shea, T.E.
Author_Institution :
Electrical Research Products, Inc.
Volume :
49
Issue :
1
fYear :
1930
Firstpage :
105
Lastpage :
116
Abstract :
The paper describes the technique and apparatus of sound picture recording and reproduction, with emphasis on their electrical engineering aspects. The various steps in the processes of disk and film recording are outlined as they take place in the Western Electric systems. Microphone placements, sound insulation, monitoring and mixing, and the circuits for amplifying currents and distributing them to recording machines are discussed. This is followed by a description of the disk and film recording machines. The changes which have been required in theater equipment to provide for the reproduction and projection of sound in synchronism with motion pictures are outlined. Some of the laboratory developments and studies out of which recording and reprodutction methods have grown are given brief mention.
Keywords :
Acoustic materials; Disk recording; Electrical equipment industry; Frequency synchronization; Laboratories; Microphones; Monitoring; Motion pictures; Telephony; Vibrations;
fLanguage :
English
Journal_Title :
American Institute of Electrical Engineers, Transactions of the
Publisher :
ieee
ISSN :
0096-3860
Type :
jour
DOI :
10.1109/T-AIEE.1930.5055463
Filename :
5055463
Link To Document :
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