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Comparison of FDTD-calculated specific absorption rate in adults and children when using a mobile phone at 900 and 1800 MHz.

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Martinez-Burdalo M, Martin A, Anguiano M, Villar R · 2004

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Children's brains absorb a higher percentage of cell phone radiation than adults due to thinner skulls and smaller head size.

Plain English Summary

Summary written for general audiences

Researchers used computer modeling to compare how much cell phone radiation is absorbed by adult versus child head models at common cell phone frequencies. They found that while smaller heads absorb less total radiation, children's brains absorb a higher percentage of that energy due to their thinner skulls and smaller head size. This suggests children may face greater brain exposure to cell phone radiation than current safety standards account for.

Why This Matters

This research reveals a critical gap in how we assess cell phone safety for children. Current safety standards are based on adult head models, but this study demonstrates that children's developing brains may absorb proportionally more radiation than adults when using the same device. The science shows this isn't just about head size - it's about the fundamental differences in tissue thickness and composition between children and adults. What this means for you as a parent is that the safety limits your child's phone must meet were never designed with their unique physiology in mind. The reality is that a one-size-fits-all approach to EMF safety may be leaving our most vulnerable population inadequately protected.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.80 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.80 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 900 and 1800 MHz

Study Details

In this paper, the specific absorption rate (SAR) in scaled human head models is analysed to study possible differences between SAR in the heads of adults and children and for assessment of compliance with the international safety guidelines, while using a mobile phone.

The finite-difference time-domain method (FDTD) has been used for calculating SAR values for models ...

Results show that peak SAR1 g and peak SAR10 g all trend downwards with decreasing head size but as ...

Cite This Study
Martinez-Burdalo M, Martin A, Anguiano M, Villar R (2004). Comparison of FDTD-calculated specific absorption rate in adults and children when using a mobile phone at 900 and 1800 MHz. Phys Med Biol. 49(2):345-354, 2004.
Show BibTeX
@article{m_2004_comparison_of_fdtdcalculated_specific_2415,
  author = {Martinez-Burdalo M and Martin A and Anguiano M and Villar R},
  title = {Comparison of FDTD-calculated specific absorption rate in adults and children when using a mobile phone at 900 and 1800 MHz.},
  year = {2004},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/15083675/},
}
PubMed: 15083675

Cited By (109 papers)

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Quick Questions About This Study

Yes, children's brains absorb a higher percentage of cell phone radiation than adults, according to computer modeling research. While smaller heads absorb less total radiation, children's thinner skulls and smaller head size mean their brain tissue receives proportionally more exposure from 900 and 1800 MHz frequencies.
Research suggests children may face greater brain exposure to cell phone radiation than current safety standards account for. Computer models show that as head size decreases, the percentage of energy absorbed in brain tissue increases, potentially putting children at higher risk than adults.
Computer modeling studies indicate children's brains absorb proportionally more cell phone radiation than adults due to thinner skulls and smaller head dimensions. This higher absorption rate suggests current safety limits may not adequately protect developing brains from 900 and 1800 MHz radiation exposure.
Smaller heads absorb less total radiation but a higher percentage reaches the brain tissue. Research shows that as head size decreases, brain absorption increases proportionally due to thinner skulls and reduced distance between the antenna and brain in children versus adults.
Yes, computer modeling demonstrates that children experience higher brain radiation exposure percentages than adults when using cell phones. Despite absorbing less total energy, children's thinner skulls allow more radiation to penetrate brain tissue at both 900 and 1800 MHz frequencies.