"Excessive" noise outburst behavior of 24 second graders was effectively controlled under automated stimulus conditions. A voice operated relay transmitted signals to an automated combination light display and outburst time/total running time meters; under 2 conditions, the light display functioned first as a primary, then as a secondary reinforcer for "quiet" behavior. The mean outburst ratio dropped from 94.96 percent (Baseline) to 44.19 percent (Condition I) to 34.00 percent (Condition II). Such automated procedures can free the teacher to teach and can lower the chances that she may become an aversive stimulus. (Author/DLG)