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  • 1
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    Speech variability effects on recognition accuracy associated with concurrent task performance by pilots (1985)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: In the present study of the responses of pairs of pilots to aircraft warning classification tasks using an isolated word, speaker-dependent speech recognition system, the induced stress was manipulated by means of different scoring procedures for the classification task and by the inclusion of a competitive manual control task. Both speech patterns and recognition accuracy were analyzed, and recognition errors were recorded by type for an isolated word speaker-dependent system and by an offline technique for a connected word speaker-dependent system. While errors increased with task loading for the isolated word system, there was no such effect for task loading in the case of the connected word system.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
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    NASA TECHNICAL REPORTS
  • 2
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    Selecting cockpit functions for speech I/O technology (1985)
    In:  Other Sources
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    Publication Date: 2019-06-28
    Description: A general methodology for the initial selection of functions for speech generation and speech recognition technology is discussed. The SCR (Stimulus/Central-Processing/Response) compatibility model of Wickens et al. (1983) is examined, and its application is demonstrated for a particular cockpit display problem. Some limits of the applicability of that model are illustrated in the context of predicting overall pilot-aircraft system performance. A program of system performance measurement is recommended for the evaluation of candidate systems. It is suggested that no one measure of system performance can necessarily be depended upon to the exclusion of others. Systems response time, system accuracy, and pilot ratings are all important measures. Finally, these measures must be collected in the context of the total flight task environment.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
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    NASA TECHNICAL REPORTS
  • 3
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    Versatile simulation testbed for rotorcraft speech I/O system design (1986)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: A versatile simulation testbed for the design of a rotorcraft speech I/O system is described in detail. The testbed will be used to evaluate alternative implementations of synthesized speech displays and speech recognition controls for the next generation of Army helicopters including the LHX. The message delivery logic is discussed as well as the message structure, the speech recognizer command structure and features, feedback from the recognizer, and random access to controls via speech command.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 861661 , Aerospace Behavioral Engineering Technology Conference; Oct 13, 1986 - Oct 16, 1986; Long Beach, CA; United States
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    NASA TECHNICAL REPORTS
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