Radio age research, manufacturing, communications, broadcasting, television (1941)

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H( \ 1,1 H liMl \kll;-~ I \1 I I'l 1 I I III MOVEMENT OF R.\ILEOAD TRAFFIC AS SHOWN IN THIS SCENE TAKEN FHOM A CHICAGO FREIGHT YARD. Sound Speeds the War Effort MICROPHONE. LOUDSPEAKER BECOME NECESSARY TO EFFICIENT OPERATION OF FACTORIES. AIR FIELDS, NAVAL BASES. ORDNANCE PLANTS; ONE COMPANY AVERAGES 6.000 CALLS A DAY. ^ By George R. Ewald Manager, Sound Products Division, RCA Manufacturing Compantj THE nAi'ii) TRANsiTiox to Wartime activities throughout this countn' has brought about many startling changes. E\oKition tliat would ordinar- ily occur slowly over a number of years now takes place almost over night. New ideas, new processes, new mate- rials, and new man-to-man relation- ships are rapidly taking form in indus- trial operations. These changes create new needs and, as is usual in periods of flux, the inventive genius of man responds to the urgent necessities of the occasion. One of the most interesting develop- ments has occurred in the field of what lias been somewhat loosely termed "Commercial Sound." Certainly, the word "Commercial" does not now properlv classify the tremendously broad field into which amplified sound has made its entrance so effectively. Today the microphone, amplifier, and loudspeaker arc \itallv necessary' ad- juncts to the efficient operation of in- dustrial plants of every description; military projects of all kinds; air fields; naval bases; ordnance plants; proving grounds; training schools; shipyards; railroad yards; amusement, educa- tional, and recreational activities; and. SOUND SYSTEM CONTROL DESK, WHERE SPECIFIC OR GENERAL CALLS ORIGLXATE. RADIO AGE II