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1948
NINE RECENT AMERICAN STANDARDS
539
American Standard
Theatre Sound Test Film for
35-Millimeter Motion Picture Sound
Reproducing Systems
K'-a. U. S. I'ul. Off.
Z22.60-1948
>UDC 778.5
1. Scope and Purpose
1.1 This standard describes a film for qualitatively checking and adjusting 35-millimeter motion picture sound reproducers and for judging the acoustical properties of the auditorium in which the sound is reproduced.
2. Test Film
2.1 The film shall have a sound track and accompanying picture. The sound track shall comply with American Standard Sound Record and Scanned Area, Z22.40-1946, and the film stock used shall be cut and perforated in accordance with American Standard Cutting and Perforating Dimensions for 35-Millimeter Motion Picture Positive Raw Stock, Z22.36-1947, or any subsequent revisions thereof.
2.2 The test film shall contain samples selected from studio feature pictures by an appropriate engineering committee of the Motion Picture Research Council and the Society of Motion Picture Engineers. The following sound samples are typical of those which may be included:
(a) Main title music
(b) Dialogue
(c) Piano
(d) Orchestral music
(e) Vocal music
2.3 The assembled film shall include appropriate samples of typical release-print material intended to provide a qualitative check
of such reproducing system characteristics as:
(a) Frequency response
(b) Volume range
(c) System noise
(d) Power-handling capacity
(e) Flutter
2.4 Each film shall be provided with head and tail leaders as specified in American Standard Specifications for 35-Millimeter Sound Motion Picture Release Prints, Z22.551947, or any subsequent revision thereof. The main title shall include the issue number of the film so that revised versions, which may be issued periodically to conform to changing studio practices, may be easily identified. Subtitles superimposed over each sample shall indicate the particular sound characteristic demonstrated by that portion of the film.
2.5 The length of the film shall be approximately 500 feet.
3. Method of Use
3.1 From a typical location in the auditorium the observer should determine whether or not the frequency-response characteristics of the complete reproducing system are normal by listening to the sound reproduced from the test film at normal sound level.
NOTE: A test film in accordance with this standard is available from the Motion Picture Research Council or the Society of Motion Picture Engineers.