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This report describes an experiment in which military officers used voice recognition equipment to verbally enter commands to a computer network similar to that of a command and control center, or a shipboard information center. Results suggest that voice input can result in faster operation and fewer errors for such activities and give the operator more time to do other things. In addition, operators are very comfortable using voice input because of the more natural man-machine interface. (Author) ; Naval Electronic Systems Command, Washington, D. C. ; http://archive.org/details/experimentswithv00pooc ; N0003980WR09041 ; NA

The paper discusses the effect of audio sound pattern, intensity and frequency on human visual depth perception and visual discrimination ability. The depth perception ability of fifteen subjects that were used in these experiments was not significantly affected by the experimental variables. Visual discrimination ability was degraded by the experimental variable of 400 cps. sinusoidal sound between 80 and 110 decibels. The degradation was .205 seconds and may have an effect on human performance in situations where activity involving high speeds is present ; http://archive.org/details/effectsofsoundpa00pooc ; Sponsoring military activity: Naval Air Systems Command, Washington, D.C. ; NA

The purpose of the study was to determine the effects of illumination color, viewing distance, and turbidity on a visual reading task in a totally dark, flooded environment. The reading task was to read a voltmeter and make a correct oral report of the reading. A total of 180 data points spread over 18 viewing conditions were taken for each subject. Seventeen military officers were used as subjects. Experimental conditions were presented in a random manner to all subjects. As statistical examination of the results showed that white or green illumination is better than red in reducing reading response time. Turbidity levels were significant in affecting response time showing an increased response time as the attenuation coefficient increased. There was no difference in the effect of an eight inch viewing distance versus a thirteen inch viewing distance. The error rate was constant, with no variable having a greater effect on the error rate than did other variables. The expected error rate over all variable was .037 errors per each trial taken ; http://archive.org/details/underwaterdispla00pooc ; Sponsoring military activity: Naval Electronics Laboratory, San Diego, CA.

The purpose of the study was to determine the effects of water turbidity, display background color, and the color and intensity of illumination on a visual reading task in a dark, flooded environment. The reading task was to read a voltmeter and make a correct oral report of the reading. The sixteen subjects used in the study were allowed to set the intensity at a level which they felt was the minimal needed without sacrificing accuracy or speed in the reading task. As was expected, the results show no difference in the effects of the other variables since subjects apparently adjusted the intensity to a level which equalized the effects of the other variables in any given condition. There was a significant statistical difference in the response times under the two water turbidities used but this difference was only .07 seconds ; http://archive.org/details/underwaterdispla71pooc ; Supporting military activity: Naval Electronics Laboratory Center, San Diego, CA.

This report describes an experiment in which military officers used voice recognition equipment under various mental loading conditions. Results showed voice recognition performance degraded as mental loading was imposed on the subjects. ; sponsored by Mr. Frank Deckelman, NAVELEX, Code 330. The work was performed by the authors at the Naval Postgraduate School, Monterey, California. ; http://archive.org/details/effectofoperator16arms ; N0003980WR09041 ; NA

This report describes an experiment examining voice recognition performance when subjects were required to make a decision every 1.5 seconds for 20 consecutive minutes while speaking to a voice recognizer at the same time. Results showed mental loading degraded voice recognition performance. Results also showed performance degradation similar to a vigilance decrement over eight trials of 2.5 minutes each. (Author) ; sponsored by Mr. Frank Deckelman, NAVELEX, Code 330. The work was performed by the authors at the Naval Postgraduate School, Monterey, California ; http://archive.org/details/effectoftaskdura00arms ; N0003980WR09041 ; NA