Practical ergonomics recommendations for the use of auditory and visual signals for improving system performance

The practical ergonomics recommendations for the use of auditory and visual signals for improving performance of systems, are discussed. When the auditory signal is situated directly at the front or directly in the rear, the subject have some difficulty in determining its localization. Spatially compatibility effects will depend mostly on the correspondence between the relative positions of signal and response sets a control console. The auditory signals for soliciting specific response should not be positioned in a longitudinal orientation with respect to the subject, and a fore period warning of at least two seconds should be given before signal presentation to alert the operator for faster reaction times.