
Part 1: Multi-frequency test films - Part 2: Buzz track test films.-Part 3:1000-cycle balancing and sound level test films.-Part 4:sound focusing test films/ .-Part 5: scanning beam uniformity test films.
Test films for 35mm. cimematograph projectors by British Standards Institution. Published by British Standards Institution in 1953. Publication and catalogue information, links to buy online and reader comments.