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The effects of speech controls on performance in advanced helicopters in a double stimulation paradigmThe potential benefit of speech as a control modality has been investigated with mixed results. Earlier studies suggests that speech controls can reduce the potential of manual control overloads and improve time-sharing performance. However, these benefits were not without costs. Pilots reported higher workload levels associated with the use of speech controls. To further investigate these previous findings, an experiment was conducted in a simulation of an advanced single-pilot, scout/attack helicopter at NASA-Ames' ICAB (interchangeable cab) facility. Objective performance data suggested that speech control modality was effective in reducing interference of discrete, time-shared responses during continuous flight control activity. Subjective ratings, however, indicated that the speech control modality increased workload. Post-flight debriefing indicated that these results were mainly due to the increased effort to speak precisely to a less than perfect voice recognition system.
Document ID
Document Type
Conference Paper
Bortolussi, Michael R.
(Western Aerospace Laboratories, Inc. Moffett Field, CA, United States)
Vidulich, Michael A.
(USAF, Armstrong Laboratory, Wright-Patterson AFB OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Behavioral Sciences
Meeting Information
International Symposium on Aviation Psychology(Columbus, OH)
Accession Number
Funding Number(s)
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