Category:Bell Telephone Magazine, 1940

Media in category "Bell Telephone Magazine, 1940"

The following 141 files are in this category, out of 141 total.

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  Bell telephone magazine (1922) (14569933590).jpg 1,826 × 722; 443 KB
  
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  Bell telephone magazine (IA belltelephonemag19amerrich).pdf 839 × 1,445, 338 pages; 25.34 MB
  
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  Curtiss JN-4 from Bell telephone magazine (1922).jpg 2,000 × 982; 548 KB
  
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  Homer Dudley (October 1940). "The Carrier Nature of Speech". Bell System Technical Journal, XIX(4);495-515. -- Fig.5 The voder being demonstrated at the New York World's Fair.jpg 1,692 × 2,030; 1.36 MB
  
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  Homer Dudley (October 1940). "The Carrier Nature of Speech". Bell System Technical Journal, XIX(4);495-515. -- Fig.6 Block diagram of the voice mechanism.jpg 1,734 × 900; 461 KB
  
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  Homer Dudley (October 1940). "The Carrier Nature of Speech". Bell System Technical Journal, XIX(4);495-515. -- Fig.7 Schematic circuit of the vocoder (derived from Fig.8).jpg 1,734 × 1,100; 501 KB
  
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  Homer Dudley (October 1940). "The Carrier Nature of Speech". Bell System Technical Journal, XIX(4);495-515. -- Fig.8 Schematic circuit of the voder.jpg 1,734 × 1,000; 543 KB
  
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  VODER demonstrated on 1939 New York World Fair - Audition! Hearing themselves as others heard them - Bell Telephone Quarterly (January 1940).jpg 1,988 × 1,354; 1 MB
  
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  VODER demonstrated on 1939 New York World Fair - lining up for hearing tests - Bell Telephone Quarterly (January 1940).jpg 2,006 × 1,264; 769 KB
  
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  VODER demonstrated on 1939 New York World Fair - The VODER fascinates the crowds - Bell Telephone Quarterly (January 1940).jpg 2,002 × 1,462; 1.11 MB