How to add sound to amateur films (1954)

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Page COPYRIGHT 137 What Copyright is 137 Procedure 138 Arrangements for Amateurs 140 PRESENTATION 143 Projector Noise 143 Picture Steadiness 144 Booths and Blimps 144 Speaker Position 146 Acoustics 148 Back Radiation 149 Sound Apparatus 1 50 Experiments 151 INDEXED GLOSSARY 152