Dosimetry for infant exposures to electronic article surveillance system: Posture, physical dimension and anatomy
No Effects Found
Lewis RC, Mínguez-Alarcón L, Meeker JD, Williams PL, Mezei G, Ford JB, Hauser R; EARTH Study Team ·2017
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Despite higher SAR values in infant brain tissue from EAS system exposure, the study suggests safety limits are unlikely to be exceeded, though the elevated absorption in developing nervous tissue warrants further investigation.
Plain English Summary
Summary written for general audiences
This study used numerical dosimetry models to compare how infant, child, and adult bodies absorb radiofrequency energy from electronic article surveillance (EAS) systems operating at 125 kHz and 13.56 MHz. The findings showed that infants had significantly higher specific absorption rate (SAR) values in brain and central nervous system tissues compared to adults (1.5 to 112 times higher depending on frequency), though safety limits were unlikely to be exceeded.
Exposure Information
Cite This Study
Lewis RC, Mínguez-Alarcón L, Meeker JD, Williams PL, Mezei G, Ford JB, Hauser R; EARTH Study Team (2017). Dosimetry for infant exposures to electronic article surveillance system: Posture, physical dimension and anatomy.
Show BibTeX
@article{lewis_rc_mnguez_alarcn_l_meeker_jd_williams_pl_mezei_g_ford_jb_hauser_r_earth_study_team_ce3767,
author = {Lewis RC and Mínguez-Alarcón L and Meeker JD and Williams PL and Mezei G and Ford JB and Hauser R; EARTH Study Team},
title = {Dosimetry for infant exposures to electronic article surveillance system: Posture, physical dimension and anatomy},
year = {2017},
doi = {10.1016/j.reprotox.2024.108759},
}
Yes, this study found that exposing male rats to either 1.5GHz or 4.3GHz microwaves for just 15 minutes caused testicular tissue damage, reduced sperm viability and motility, and decreased reproductive hormones including testosterone.
No significant difference was found between single-frequency and combined exposures. Rats exposed to both 1.5GHz and 4.3GHz together showed similar reproductive damage as those exposed to either frequency alone at the same total power level.
The reproductive effects began recovering by day 14 after exposure. However, significant damage to sperm quality, hormone levels, and testicular tissue was still evident 7 days post-exposure, indicating prolonged recovery periods.
Reproductive damage occurred at 10mW/cm² for single-frequency exposures and 5mW/cm² per frequency for combined exposures. These are high-power microwave levels significantly above typical consumer device emissions but relevant for occupational exposures.
The study identified two key mechanisms: increased oxidative stress (cellular damage from free radicals) and disrupted energy metabolism in testicular tissue. This included decreased antioxidant enzyme activity and reduced cellular energy production capacity.
