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Contents
James R Cameron | 4 |
The Projectionists New Role By F A Jewell | 13 |
Speech Interpretation in Auditoriums By E C Wente | 19 |
28 other sections not shown
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absorption acoustical amplifier anode apparatus attenuation audience auditorium broadcasting camera cathode circuit coil color Company condenser curve cycles decibels designed device diaphragm disc effect electrical energy engineers fader filament film filter frequency grid groove impedance inches industry input installation lamp lens light loudspeaker machine magnetic manufacturers mechanical ment metal meter method microphone mixer motion picture motor mounted necessary needle noise obtained ohms operation output panel phonograph photoelectric cell pickup plate possible problem production projection projectionist projector quency radio ratio RCA Photophone rectifier reproducing resistance reverberation screen shaft shown in Fig sound film sound pictures sound record sound reproduction sound track sound-on-film speaker speed stage standard studio synchronized talkies talking pictures television theatre tion tone transformer transmission transmitter ture turntable unit vacuum tube vibrations voltage volts volume control wave Western Electric wire