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Have You a Problem in Sound-Film Acoustics?
Send for This New Free Booklet,
"Acoustic Treatment of Auditoriums"
The finest motion picture sound equipment cannot overcome the handicap of an auditorium in which excessive reverberation interferes with proper sound reproduction.
To answer fully the increasing number of inquiries received concerning directional baffles, multiple speakers, and altering auditoriums for improved sound reproduction, Bell & Howell has published a new manual, "Acoustic Treatment of Auditoriums.”
Three parts are devoted to (l) principles of the sound-reproducing equipment, (2) improving sound distribution, (3) suggestions for auditorium treatment. There are
charts on reverberation time limits an i on absorption coefficients of building materials.
"Architects’ Visual Equipment Handbook"
This covers completely plans and specifications for classrooms, conference rooms, and auditoriums where sound motion picture equipment is to be used. Including blueprints, it is a complete and authoritative manual for all concerned with building or adapting rooms for showing sound films.
Send for your free copies of these handbooks today. Bell & Howell Company, Chicago; New York; Hollywood; Washington, D. C.; London.
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Superior Sound Film Projection— Easy^ Trouble-Free
Filmosound 179 is even finer than its predecessors. This l6mm sound-on-film projector incorporates war-developed refinements that simplify operation, greatly enhance sound and picture reproduction.
Visit Bell & Howell at the Regional Conference of the American Association of School Administrators of the N.E.A. New York, March 5 to 7, Booth A-41. Chicago, March 12 to 14, Booth A-4.
OPTt-ONICS — products combining the sciences of OPTIcs • elecirONics • mechanICS
HELL & HOWELL COMPANY 7134 McCormick Road, Chicago 45 Without obligation, send my copy of ( ) “Acoustic T'reatment of Auditoriums” ; also send ( ) “Architects’ Visual Equipment Handbook”; ( ) Information on 13&H Filmosound Projectors.
SINCE 1907 THE LARGEST MANUFACTURER OF PROFESSIONAL MOTION PICTURE EQUIPMENT FOR HOLLYWOOD AND THE V/ORLD
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