Variations in Noise Dosimeter Readings of FLuctuating Noise.
Abstract
Significant differences in the mean Leq(24) values were observed with dosimeters used in a study monitoring the daily noise exposures of children. That study, conducted by the Fels Research laboratory and the United States Environmental Protection Agency. In the Fels study a diffrence was observed in the mean Leq(24) values of about 7 dB using General Radio (Gen Rad) and Metrosonics noise dosimeters. The only statistically significant difference observed was between instrument types with the Gen Rad units reading higher. Possible explanations such as age and sex differences among the subjects and procedural differences were examined and ruled out. It was reasoned that group differences in mean Leq(24) recorded by the two dosimeter types were due to idiosyncrasies in the instruments themselves which resulted in systematic measurement errors. An investigation was conducted by the Bioacoustics Laboratory at Wright-Patterson AFB to determine the cause and to quantify the observed differences. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1982
- Accession Number
- ADA115763
Entities
People
- Terry M. Fairman
Organizations
- Air Force Research Laboratory