title: Fatigue after work in noise - an epidemiological survey study and three quasi-experimental field studies.
abstract: The contribution of noise exposure to fatigue at work was studied in a survey study and three field studies. The survey study was based on a questionnaire covering symptoms and work place exposure answered by 50 000 state employees. Noise exposure was also estimated from their type of job and self-rated noise exposure. Fatigue and headache were found to be more common among the noise exposed groups even after control for the effects of other critical variables. Study 2 compared reaction times before and after a week's work in high noise exposure and one in low exposure exposure in a group of aeroplane mechanics. Reaction times were prolonged after work in the noise week, whereas an opposite trend was seen in the control week. Study 3 showed a gradual increase of reaction times during a week of noise exposure in a group of aeroplane technicians. Study 4 compared reaction times and subjective fatigue among naval crews on a day with low and a day with high noise exposure. In one of the studied boat types the development of fatigue during the work day was accentuated on the day with high exposure.
authors.affiliation: National Institute for Working Life, S-171 84 Solna, Sweden.
authors.forename: Anders
authors.initials: A
authors.lastname: Kjellberg
authors.forename: Per
authors.initials: P
authors.lastname: Muhr
authors.forename: Bjorn
authors.initials: B
authors.lastname: Sköldström