While we found that the number of noise readings in excess of occupational exposure levels decreased over the first six months of use, and average noise exposure levels also decreased, we were unable to identify individual level factors associated with the change in noise exposure over time. The decrease in noise exposure was not monotonic; and the group of workers downloading over six months saw a collective spike in exposure levels during the fourth month of the intervention followed by a subsequent decline. Since the study is ongoing it will be possible to examine the long term trends in noise exposure in subsequent analyses. Further exploration of the factors that would lead an individual to take steps to reduce exposure appears warranted.