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MANAGERS AND PROJECTIONISTS
Through what does the light source from the slit pass before it reaches the film ? 999
What are the dimensions of the recording light beam when it reaches the sound track ? 999
What portion of the width of the sound track does RCA Photophone recording light beam cover when the oscillograph galvanometer is at rest? 999
What happens to the light beam at the film when the oscillograph galvanometer starts to vibrate? 999
What governs the width of the base of the "peak" on the sound track of RCA Photophone film?.... 999
What governs the height or width of the peaks in RCA Photophone sound track ? 999
What does the thickness of the "peaks" represent?.. 999
What does the height or width of the "peaks" represent? 999
Why is it that when the oscillograph galvanometer vibrates very rapidly the depth or thickness of the "peaks" is less than when the vibration is less rapid ? # 1000
Why is it that as the volume of sound is increased the "peaks" become wider or higher, extending further across the sound track? 1000
How is the registering of the picture and sound recording films made possible in the printer? 1000
What is the distance between the center of the picture frame and the point at which the sound accompanying the action at that point is recorded? 1001
Sound Reproduction
Cleanliness Important
Why is it even more important to keep films upon which sound is recorded perfectly clean than it is
to keep those carrying silent pictures only? 1003
Can a scratched sound band be repaired? 1003
Why is it imperatively necessary that the sound protectionist keep his hands scrupulously clean?.... 1003
Dust in the Air
What must and will result if there be dust in the air of the projection room ? 1004
What fault does the minute scratches caused by dust from the air set up? 1004
What should.be done with the broom before sweeping the projection room floor? 1004
What tool should the exhibitor supply for cleaning the projection room floor and walls when sound film is used ? 1004
Will it pay the exhibitor to provide a good vacuum cleaner for the projection room, and if so, why?.. 1005 xv