Direct-Positive Variable-Density Recording with the Light Valve
A method is described for making “direct-positive” variable-density sound records. Improvements over previous records are high output level, high signal-to-noise ratio, low distortion, and elimination of printer loss and distortion. Standard light valves with a superposed high-frequency bias are used in making the record.
- Print ISSN
- 0097-5834
- Published
- 1949-06
- Content type
- Original Research
- DOI
- 10.5594/J16534
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