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James R. Cash

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Publications by James R. Cash (bibliography)

1994

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Mayer, David L., Brenner, Malcolm and Cash, James R. (1994): Development of a Speech Analysis Protocol for Accident Investigation. In: Proceedings of the Human Factors and Ergonomics Society 38th Annual Meeting 1994. pp. 124-127.

“This paper describes an initial attempt to develop a protocol for speech analysis techniques that might lead to a better understanding of the cognitive and emotional states that underlie the behavior of people involved in accidents. A tape recording of radio transmissions made by a pilot during both routine and emergency flight conditions was analyzed. Five primary speech measures were made for each statement: mean fundamental frequency (f{sub:0}), range of fundamental frequencies ({Delta}f{sub:0}), duration, mean amplitude and syllable count. Speaking rate (syllables per second) and two other derived measures were computed later. During routine flight, the pilot's f{sub:0} averaged 123.9 Hz, but this increased to an average of 200.1 Hz during emergency conditions. Range of f{sub:0} also increased significantly, while syllable count decreased. These changes may provide a profile of a response to extreme stress that may be useful for gaining insight into situations in which such stress is not otherwise apparent.”

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