Identification and evaluation of noise in vocational education laboratories.
Miller-GM; Jacobs-CO; Schimpp-S
Department of Agricultural Education, College of Agriculture, University of Arizona, Tucson, Arizona 1991 Mar; :1-50
A survey was conducted of the power tools and equipment found in vocational education laboratories in 21 schools in Maricopa and Pima Counties in Arizona. The noise levels from common power tools and equipment used in these laboratories were determined. The acoustical characteristics of the selected facilities which could have an impact on noise levels were determined. Student and teacher noise exposures were determined for each facility environment. The noise levels were very high for some of the tools. The average reading for all shops was 101.7 decibels for the abrasive cut off saw, 100.5 for the portable grinder, 102.5 for the power circular saw, 101.2 for the radial arm saw, 106.7 for the air chipping hammer, and 106.5 for the electric impact wrench. Measurements of the reverberation time for each laboratory indicated that one laboratory had a reverberation time value of 0.6 seconds, six had a value of 0.8, three had a value of 1.0, and three had a value of 1.2 seconds. Student and teacher noise exposures were measured during welding. Based on the measurements taken, teacher and student exposure to noise was significant. Of the 104 student and teacher exposures measured, 73 would meet or exceed the OSHA recommended level if the same exposure were continued over the 8 hour working day. Student and teacher exposures did not correlate with the acoustic characteristics of the locations.
NIOSH-Grant; Noise-induced-hearing-loss; Noise-exposure; Machine-tools; Hand-tools; Cutting-tools; Occupational-exposure
Agricultural Education University of Arizona Forbes 222A, College of AG Tucson, AZ 85721
Final Grant Report
NTIS Accession No.
Department of Agricultural Education, College of Agriculture, University of Arizona, Tucson, Arizona
University of Arizona, Tucson, Arizona