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Audio, IEEE Transactions on

Issue 6 • Date November-December 1965

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Displaying Results 1 - 7 of 7
  • [Front cover and table of contents]

    Page(s): 0
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    Freely Available from IEEE
  • GA&E News

    Page(s): 131
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    Freely Available from IEEE
  • Audio problems in space

    Page(s): 132 - 134
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    Communication channel capacity is almost invariably at a premium between space vehicles and the earth. In the Apollo moon exploration program, plans call for the use of a special audio processing technique to enhance the signal-to-noise ratio. Extremely deep space probes such as the Mars Mariner IV now use very low bit rate transmissions because of signal-to-noise considerations: future manned planetary missions will benefit greatly from effective speech bandwidth compression techniques. This paper,calls attention to the interest in speech processing in future space exploration programs. View full abstract»

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  • A vowel meter and its application in constrained speech

    Page(s): 134 - 141
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    Though "typical" patterns can be abstracted from speech sounds, the actual patterns vary widely. The human mind extracts many patterns, making its final selection on the basis of meaning. Until computers are capable of semantic analysis, voice-operated equipment must rely on "constrained" speech, which restricts itself to a simply abstracted pattern. A vowel meter has been built which abstracts such a pattern from vowel sounds. With this equipment and others of a similar nature, a training program will be undertaken to determine the effects of training upon speech precision, in the hope that such training will make possible a voice-operated brailler for communication with the deaf-blind. The underlying principles of the vowel meter are explained. View full abstract»

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  • Voice recording in space

    Page(s): 141 - 145
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    Manned space flight uses one of the oldest communications media, speech, and a voice recorder is required to store it. CBS Laboratories developed the voice-time recorders for the NASA Gemini missions, and flights have proved their effectiveness. The small, light, reliable device records the mixed voices of the astronauts on one track and a digital time signal on the other. Cartridges with one hour capacity can be changed during orbiting, which permits taking as many cartridges as the mission duration requires. Tape is 0.110 inch wide, moves at 0.6 in/s and is contained in a unique coaxial-reel bidirectional cartridge. An ac synchronous motor, energized from a dc to ac converter, drives the mechanism at constant speed. Ground players/duplicators allow convenient transcription and time correlation of the cartridges. View full abstract»

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  • More on phase distortion

    Page(s): 146
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    First Page of the Article
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  • [Back cover]

    Page(s): c4
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Aims & Scope

This Transactions ceased production in 1965. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope