Effects of Wideband Auditory Noise on Manual Control Performance and Dynamic Response.
Final rept. Jul 71-Mar 75,
SYSTEMS TECHNOLOGY INC HAWTHORNE CALIF
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Noise is a common stress in the aerospace environment, and the purpose of this study was to investigate its effect on manual control performance and associated behavior. Nine subjects were subjected to white noise at four intensity levels of 55 dB, 75 dB, 95 dB, and 115 dB while performing a simulated pitchroll tracking task with a high attentional demand. Performance actually improved under noise, presumably due to an arousal effect. The human operators dynamic response properties were not affected by noise, however, and the performance effects arose from a reduction in remnant subject tracking noise and possibly cross coupling internal to the operator. A measure of subjective reaction to the noise environment showed high sensitivity to the various noise levels and some habituation over three experimental sessions. Also, tracking performance showed steady improvement over the three sessions, probably due to learning. Author
- Human Factors Engineering and Man Machine Systems