SENSORY INTERACTION: THE EFFECTS OF AMBIENT NOISE AND COMBINED VISUAL-AUDITORY SONAR DISPLAYS ON SIGNAL DETECTION.
GENERAL DYNAMICS GROTON CT ELECTRIC BOAT DIV
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A review of the literature was undertaken to determine the effects of ambient noise and combined audio-visual sonar displays on signal detection. Literature relevant to the problem of ambient noise showed 1 that an increase in ambient noise should have no effect on the ability of the alerted operator to detect signals 2 that for vigils requiring responses to infrequent signals in single displays, noise has little or no effect on monitoring performance 3 that for tasks requiring time sharing among several displays, noise produces decrements in monitoring performance and 4 that for tasks requiring the operator to process displayed data in order to extract signals, i.e., computation or counting, noise produces decrements in monitoring performance. The literature relevant to the problem of dual sensory display presentation showed that such displays increase detection probability when they present completely redundant information, but decrease detection probability when they present completely nonredundant information. The studies cited in this report represent the only studies found that employed tasks comparable to sonar detection tasks. Some real differences exist, however, between the parameters of these two sets of tasks. It was concluded that these differences limit the applicability of the findings of existing studies for evaluating the effects of ambient noise and dual sensory display presentation at the sonar station. Author
- Acoustic Detection and Detectors