RCA Victor High Fidelity Film Recording Equipment
An illustrated description is given of new sound recording equipment having an extended frequency range1 and capable of making recordings and re-recordings on either 35-or 16-mm. film. Contact prints made from the 35-mm. recordings or re-recordings, when played on a reproducing equipment having a flat response characteristic, produce sound outputs that do not vary more than plus or minus two decibels over the frequency range 50 to 9000 cycles. The equipment is composed of units that are light in weight, are small and compact but rugged, consume little power and are easily installed and operated for either studio or portable use. — Some of the features of the equipment are (a) symmetrical variable width recording with improved ground noise reduction; (b) a new large mirror galvanometer; (c) permanent magnet ribbon microphones operated remotely from their amplifiers; (d) improved constant impedance mixer using variable bridged “T” type attenuators; (e) correction for the response of the human ear to speech reproduced at greater than normal volume; (f) new amplifying equipment providing improved quality and quieter operation; and (g) new high-quality film phonograph and recorders.
- Print ISSN
- 0097-5834
- Published
- 1933-05
- Content type
- Original Research
- DOI
- 10.5594/J10133