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EFFECTS OF NOISE ON THE PERFORMANCE OF A MEMORY-DECISION-RESPONSE TA

An investigation has been made to determine the effects of noise on human performance. Fourteen subjects performed a memory-decision-response task in relative quiet and while listening to tape recorded noises. Analysis of the data obtained indicates that performance was degraded in the presence of noise. Significant increases in problem solution times were found for impulsive noise conditions as compared with times found for the no-noise condition. Performance accuracy was also degraded. SUMMARY The present study investigated the effects of noise on the performance of a self-paced memory-decision-response task, primarily of a mental nature and requiring high subject concentration. Fourteen subjects performed the task in relative quiet and while listening to a variety of commonly heard noises, half of which were aircraft noises. Quality of work, as well as rate of work, was examined. Analysis of the performance data showed that different subjects and noises had statistically significant effects upon mean task time. caused by noises of impulsive character. A positive relation was found between e r r o r task responses and sound pressure level experienced by the subjects. Both speed and accuracy on the memory-decision-response task were degraded by the noises used in the testing situation.