Positive effects of sound feedback during the operation of a plant simulator

An experiment was carried out to estimate the effect of sound feedback on the work of a plant operator. Eight students of computer science operated a process simulation program of an assembly line with computer numeric controlled (CNC) robots. Rele-vant information of disturbances and machine breakdowns was given only in a visual (test condition 1), and in visual and audible form (test condition 2). The results indicate, that the additional sound feedback improves significantly the operator per-formance and increases positively some mood aspects