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Measurements of Radiofrequency Radiation with a Body-Borne Exposimeter in Swedish Schools with Wi-Fi. Front.

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Hedendahl LK, Carlberg M, Koppel T, Hardell L. · 2017

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Mean radiofrequency radiation levels measured on teachers in Swedish schools ranged from 1.1 to 66.1 µW/m², with a peak of 82,857 µW/m² from mobile phone uplink.

Plain English Summary

Summary written for general audiences

Eighteen teachers from seven schools carried a body-borne exposimeter in school to measure radiofrequency radiation exposure. The mean exposure to RF radiation ranged from 1.1 to 66.1 µW/m² across the schools. The highest mean level recorded was 396.6 µW/m² during 5 minutes of a lesson when the teacher let students stream and watch YouTube videos.

Why This Matters

Teachers in grades 7–12 carried a body-borne exposimeter, EME-Spy 200, in school during 1–4 days of work. The exposimeter can measure 20 different frequency bands from 87 to 5,850 MHz. Researchers used the teachers' measured exposure to approximate the children's exposure in the same classrooms.

Exposure Details

Power Density
0.00000011 - 0.00000661, 0.00003966, 0.0082857 mW/cm²
Source/Device
87 to 5,850 MHz

Exposure Context

This study used 0.00000011 - 0.00000661, 0.00003966, 0.0082857 mW/cm² for radio frequency:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.00000011 - 0.00000661, 0.00003966, 0.0082857 mW/cm²Extreme Concern - 1,000 µW/m²FCC Limit - 10M µW/m²Effects observed in the Slight Concern range (Building Biology)FCC limit is 9.09 million times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 5.85 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 5.85 GHzPower lines50/60 HzCell phones~1 GHz5G mm28 GHzLogarithmic scale

Study Details

The aim of this study is to investigate Measurements of Radiofrequency Radiation with a Body-Borne Exposimeter in Swedish Schools with Wi-Fi. Front.

This study conducted exposimetric measurements in schools to assess RF emissions in the classroom by...

Eighteen teachers from seven schools participated. The mean exposure to RF radiation ranged from 1.1...

Cite This Study
Hedendahl LK, Carlberg M, Koppel T, Hardell L. (2017). Measurements of Radiofrequency Radiation with a Body-Borne Exposimeter in Swedish Schools with Wi-Fi. Front. Public Health, 20 November 2017 | https://doi.org/10.3389/fpubh.2017.00279.
Show BibTeX
@article{lk_2017_measurements_of_radiofrequency_radiation_1020,
  author = {Hedendahl LK and Carlberg M and Koppel T and Hardell L.},
  title = {Measurements of Radiofrequency Radiation with a Body-Borne Exposimeter in Swedish Schools with Wi-Fi. Front.},
  year = {2017},
  doi = {10.3389/fpubh.2017.00279},
  url = {https://www.frontiersin.org/articles/10.3389/fpubh.2017.00279/full},
}
DOI: 10.3389/fpubh.2017.00279

Cited By (35 papers)

Quick Questions About This Study

Eighteen teachers from seven schools participated.
The highest mean level was 396.6 µW/m², recorded during 5 minutes of a lesson when the teacher let students stream and watch YouTube videos.
Maximum peaks went up to 82,857 µW/m² from mobile phone uplink.
Teachers carried a body-borne exposimeter, EME-Spy 200, which can measure 20 different frequency bands from 87 to 5,850 MHz.
Researchers measured teachers' RF exposure in order to approximate the children's exposure.