There are a number of possible explanations for the observed decrease in excessive noise levels. By receiving daily feedback about their daily noise ‘dose’, workers can respond by taking steps to use their hearing protection more effectively. This may involve wearing the hearing protection devices more consistently (for example, not removing the device to communicate in noise), and also ensuring that the hearing protector is correctly seated in the ear canal. Workers can also reduce noise exposure through avoidance of noise sources or reducing the amount of time they spend doing noisy job tasks. Another way they might reduce exposures is to bring an excessive noise source to the attention of supervisors or other responsible plant personnel so that noise-engineering controls can be implemented and the noise source controlled.