Personal 24 Hour Emdex Pilot Project
Project completed by Lynne Gillette, while working at the
U.S. EPA, no resrictions on it's use
This project involved twenty volunteers who wore EMDEX C meters
for 24 hours (including a typical work/school day) and logged
information about their activities and possible sources of
magnetic fields they encountered. Most of the subjects (18)
were federal office workers, one was a middle school student,
another was a horse stable operator. Magnetic fields in the ELF
range were collected at 10 second intervals.
Data were collected during the period March to June 1992.
Data were collected in the Washington DC metropolitan area, in
At the volunteer's work or school, and various sites away from
work or school incuding residences, vehicles, retail stores,
medical offices, horse pastures and other locations.
Volunteers were recruited from among the researchers coworkers
and friends. This was in no way intended to be a random
sample. Only one coworker who was asked to participate
20 volunteers, each collecting one 24-hour session
Resultant magnitude of contemporaneous three-axis magnetic
Work and nonwork exposures recorded using personal exposure
data logger worn in a pouch at the waist. Activities were
noted on a log sheet by the subject.