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File: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

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Identifier: bellsystemtechni19amerrich (find matches)
Title: The Bell System technical journal
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company
Subjects: Telecommunication Electric engineering Communication Electronics Science Technology
Publisher: [Short Hills, N.J., etc., American Telephone and Telegraph Co.]
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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Text Appearing Before Image:
Fig. 5—The voder being demonstrated at the New York Worlds Fair. cuit, the arrangement in Fig. 2 will be followed with sufficient detailto show the functional relations of the parts discussed in this paper.Figure 6 gives a block diagram of the voice mechanism of Fig. 1with approximating electrical circuit symbols. The same communica-tion paths can be traced. Thus from the talkers brain are sent nerveimpulses that set up the message as a set of muscular displacementscontaining information as to the voice carrier to use, the fundamentalfrequency for the voiced carrier, and the selective transmission of thevocal tract. The air expelled from the lungs sets up as carriers the 508 BELL SYSTEM TECHNICAL JOURNAL

Text Appearing After Image:
Fig. 6—Block diagram of the voice mechanism. breath tone for unvoiced and the vocal cord tone for voiced sounds.For simpHcity the carrier selection is shown after instead of before thecarrier generation. These carriers are modulated by the message waveto produce the output of speech in the form of the message-modulatedcarrier in the audible range of frequencies. Figures 7 and 8 show similar block schematics for the vocoder andthe voder. The voder circuit has been simplified by the omission of afew controls for easier operation. In these electrical synthesizers, thecarrier is provided by a buzzer-like tone from a relaxation oscillator forthe voiced sounds and from a hiss-like sound from a gas-filled tube for IDEA (DETAILS ARE AS IN COMPLETE CIRCUIT SHOWN IN FIG.2)

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Image from page 531 of "The Bell System technical journal" (1922)

References

Fig.6 Block diagram of the voice mechanism from: Dudley, Homer (October 1940). "The Carrier Nature of Speech". Bell System Technical Journal XIX (4): 508.
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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
    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
  • 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
    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
  • 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
    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
Volume
InfoField
19
Flickr tags
InfoField
  • bookid:belltelephonemag19amerrich
  • bookyear:1922
  • bookdecade:1920
  • bookcentury:1900
  • bookauthor:American Telephone and Telegraph Company
  • booksubject:Telecommunication
  • booksubject:Electric_engineering
  • booksubject:Communication
  • booksubject:Electronics
  • booksubject:Science
  • booksubject:Technology
  • bookpublisher:_Short_Hills__N_J___etc___American_Telephone_and_Telegraph_Co__
  • bookcontributor:Prelinger_Library
  • booksponsor:Internet_Archive
  • bookleafnumber:531
  • bookcollection:prelinger_library
  • bookcollection:additional_collections
  • bookcollection:americana
  • BHL Collection

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Date/TimeThumbnailDimensionsUserComment
current07:59, 7 November 2017Thumbnail for version as of 07:59, 7 November 20171,734 × 900 (461 KB)Clusternote (talk | contribs)removed the particle noises
07:37, 7 November 2017Thumbnail for version as of 07:37, 7 November 20171,734 × 900 (464 KB)Clusternote (talk | contribs)re-clipped (1734x900) and whitened, from source: https://archive.org/stream/bellsystemtechni19amerrich/bellsystemtechni19amerrich#page/508/mode/1up
17:05, 31 October 2017Thumbnail for version as of 17:05, 31 October 20171,728 × 909 (748 KB)Clusternote (talk | contribs)re-clipped the Fig.6 on source: https://archive.org/stream/bellsystemtechni19amerrich/bellsystemtechni19amerrich#page/508/mode/1up
12:13, 31 October 2017Thumbnail for version as of 12:13, 31 October 20171,656 × 780 (206 KB)Clusternote (talk | contribs)Transferred from Flickr via Flickr2Commons

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