Cinematographic annual : 1930 (1930)

Record Details:

Title:
Cinematographic annual : 1930
Date:
1930
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1930
Leaf #:
000463
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

RECORDING SOUND ON DISC 443 The degree of faithfulness with which the current set up by the reproducer will simulate the recorded current will depend principally upon the electrical characteristics of the recorder and the reproducer. Fig. 10 indicates that the recorder operates with 15 in z ~~X" > D » i 3 ° hi > J, hi > J 50 100 500 1000 FREQUENCY FIGURE 10 Frequency Characteristic of an Electrical Recorder 5000 10000 20 15 «, 0 -«, 20 50 100 500 1000 50( FREQUENCY FIGURE 11 Frequency Characteristic of a Typical Reproducer 10000 uniform efficiency over a band of frequencies extending upward to 5,000 cycles, which is about the upper cut-off frequency used in the theatre. At the low frequency end the recorder efficiency droops in a manner which helps to avoid over-cutting of the wax and at the same time partially compensates for the tendency of the stage and theatre acoustics to over-emphasize the very low frequencies. The reason for a consideration of over-cutting of the lower frequencies is not apparent from the curve of Fig. 10, unless it is remembered that the recorder is a constant velocity device and that the curve is plotted in terms of relative velocity. This means that for a given input voltage to the speech coils of