The interactive effect of industrial noise type, level and frequency characteristics on occupational skills

The effects of noise on human health and productivity represent major environmental and occupational issues. This study examined the combined effect of noise type (steady, intermittent and fluctuating), level (75 dB, 85 dB and 95 dB) and frequency (roar and hiss) on speed (time taken to complete the task) and accuracy (time taken correcting errors and error volume) using a Steadiness Test. Ten participants responded once to each of the 18 conditions, plus an additional condition with no noise present. Frequency characteristics significantly impacted performance more than other noise attribute, with hiss noise having the biggest impact in terms of decreasing speed and increasing error time and volume.