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Brain & Nervous System

High-resolution numerical model of the middle and inner ear for a detailed analysis of radio frequency absorption.

No Effects Found

Schmid G, Uberbacher R, Samaras T, Jappel A, Baumgartner WD, Tschabitscher M, Mazal PR. · 2007

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Cell phones deposit minimal RF energy in ear structures, making thermal hearing damage unlikely at typical power levels.

Plain English Summary

Summary written for general audiences

Researchers created a detailed computer model of the human inner and middle ear to measure how much radiofrequency energy is absorbed from cell phones held near the head. They found that handheld mobile devices deposit very small amounts of energy in ear structures - the highest absorption, 166 microwatts in the labyrinth, occurred at 400 MHz with a 500 mW device, and typical phone frequencies (900 MHz and 1850 MHz) were more than ten times lower. The study concluded that cell phone radiation is unlikely to cause temperature-related damage to hearing organs.

Why This Matters

This 2007 modeling study provides important context for concerns about cell phone radiation affecting hearing. The researchers found that even at maximum power levels, RF absorption in the inner ear remains minimal - orders of magnitude below what would cause heating effects. However, this study only examined thermal mechanisms and didn't investigate non-thermal biological effects that have become a growing focus of EMF research. While the findings are reassuring for acute heating damage, they don't address the broader question of whether chronic, low-level RF exposure might affect hearing through other pathways. The science demonstrates that your ear structures absorb very little energy from your phone, but this represents just one piece of the larger EMF health puzzle.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 3.70 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 3.70 GHzPower lines50/60 HzCell phones~1 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 400-3700 MHz

Study Details

In order to enable a detailed analysis of radio frequency (RF) absorption in the human middle and inner ear organs, a numerical model of these organs was developed at a spatial resolution of 0.1 mm, based on a real human tissue sample.

The dielectric properties of the liquids (perilymph and endolymph) inside the bony labyrinth were me...

For typical output power values of real handheld mobile communication devices the obtained results s...

These results indicate that temperature-related biologically relevant effects on the middle and inner ear, induced by the RF emissions of typical handheld mobile communication devices, are unlikely.

Cite This Study
Schmid G, Uberbacher R, Samaras T, Jappel A, Baumgartner WD, Tschabitscher M, Mazal PR. (2007). High-resolution numerical model of the middle and inner ear for a detailed analysis of radio frequency absorption. Phys Med Biol. 52(7):1771-1781, 2007.
Show BibTeX
@article{g_2007_highresolution_numerical_model_of_3372,
  author = {Schmid G and Uberbacher R and Samaras T and Jappel A and Baumgartner WD and Tschabitscher M and Mazal PR.},
  title = {High-resolution numerical model of the middle and inner ear for a detailed analysis of radio frequency absorption.},
  year = {2007},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/17374910/},
}
PubMed: 17374910

Cited By (16 papers)

Quick Questions About This Study

A 2007 computer modeling study found that cell phones deposit extremely small amounts of radiofrequency energy in inner ear structures - no more than 166 microwatts, at 400 MHz, the frequency with the highest absorption. At typical mobile phone frequencies, energy absorption was more than ten times lower.
Research using detailed computer models of the human ear found that cell phone radiation is unlikely to cause temperature-related damage to hearing organs. Even high-power devices (500 mW) at 400 MHz deposited only 166 microwatts in the inner ear labyrinth.
A 2007 modeling study found that 900 MHz radiation from typical mobile phones absorbs minimal energy in the vestibulocochlear nerve - more than ten times less than the already tiny 12 microwatts measured at 400 MHz with high-power devices.
Computer modeling research found that 400 MHz radiation showed the highest absorption in middle and inner ear organs compared to typical mobile phone frequencies. However, even at 400 MHz, energy absorption remained extremely low at 166 microwatts.
Both frequencies show extremely low energy absorption in ear structures according to 2007 modeling research. The study found that typical 1850 MHz phones (125 mW output) and 900 MHz phones (250 mW output) both absorb minimal radiofrequency energy in hearing organs.