16-mm sound motion pictures, a manual for the professional and the amateur (1949-55)

Record Details:

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.

PRACTICAL PROJECTOR PERFORMANCE 493 10 0 -10 -20 -30 ui 5 -io o Res stive Lood i \ \ \ \ 4 \ Voi( Res 10 0 -10 20 30 stive Lood g^ VN*V \ \ \ \ 0 20 -30 !,_._"_ ,._;, Resistive Lood ~ ■■!,__ > B Voit Res 1 istive Lood "*»-._—, " \\ vS E Resistive Lood 1^^ » > \ \ c VOK Resistive Lood 10 0 -10 \ \\ -20 J» F -30 OO 300 1000 300 1000 4000 4000 100 FREQUENCY, cps Fig. 116B. Response-frequency characteristics of amplifiers of commercial sound projectors, including the scanning beam for machines -1 to F, inclusive. A warble film was run in the projector; the output of the amplifier was measured both across a dummy loud resistor, and across the voice coil of the loudspeaker. Powei output level was 1 watt at 1000 cps.