Exposure to ELF EMF during Lessons in Secondary Schools

Authors: Silangam W, Yoosook W, Kongtip P, Kongtawelert A, Theppeang K

Year: 2017 Dec 5

Category: Radiation Protection

Journal: Radiat Prot Dosimetry

DOI: 10.1093/rpd/ncx266

URL: https://www.ncbi.nlm.nih.gov/pubmed/29216404

Abstract

Abstract Summary: Exposure to ELF EMF during Lessons in Secondary Schools

Overview

This cross-sectional study, conducted in Bangkok, Thailand, investigates the exposure levels of extremely low frequency magnetic fields (ELF-MFs) and extremely low frequency electric fields (ELF-EFs) in secondary schools.

Methodology

  • Frequency Range Studied: 5 Hz - 32 kHz for ELF-MFs, 5 Hz - 2 kHz for ELF-EFs
  • Sampling Location: 60 classrooms across three schools during class hours
  • Instrument Used: Narda EFA 300 field analyzer for spot measurements

Findings

The study revealed that although the ELF-EMF exposure levels are generally lower than the guidelines prescribed by ICNIRP, about 21.67% of classrooms had a magnetic field strength above 0.2 μT. The predominant sources of ELF-EMFs were identified as electrical equipment and wiring within the schools.

Conclusion

The study underscores the need for future research to focus on measuring ELF-EMF levels in other environments and assessing the long-term health effects of ELF-EMF exposure on children.

ELF EMF secondary school health effects electromagnetic fields Thailand exposure assessment
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