Effects of Speech Intelligibility on Crew Performance in an M1A1 Tank Simulator.

摘要

This study was conducted to quantify, as a function of speech intelligibility, the performance achieved by 30 normal hearing tank crews when conducting gunnery scenarios in an armor simulator. A scenario consisted of 10 missions. Four targets (tank, truck, helicopter, and troops) appeared during each mission, and it was the commander's task to instruct the gunner to shoot at the appropriate target with the appropriate weapon. The speech intelligibility (SI) measure used was the modified rhyme test (MRT). Performance measures (for each scenario) were recorded at nominal SI levels of 100%, 75%, 50%, 25% and 0%. Specific measures used to evaluate performance as a function of SI were categorized as follows: (1) Mission time -- Time to identify the target, Time to fire upon the target, Time to kill the target, and Time to accomplish the mission. (2) Mission completion -- Percent of targets identified, and Percent of targets killed; (3) Mission errors -- Percent of crew killed, Percent of times wrong target was killed, and Percent of communication errors; (4) Gunner accuracy -- Number of rounds required to kill a target; Aiming error. This report provides results from these performance measures and quantified the changes in armor gunnery performance as a function speech intelligibility. Keywords: Voice communications; Intercommunication systems. (EDC)