8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Whole Body / General

DETERMINATION OF THE COEFFICIENT OF REFLECTION FOR MULTILAYERED SYSTEMS OF BIOLOGICAL TISSUES IN THE MICROWAVE RANGE

Bioeffects Seen

A. R. Livenson · 1968

Share:

Your skin and fat thickness determine how much microwave radiation penetrates your body tissues.

Plain English Summary

Summary written for general audiences

This 1968 study measured how much microwave energy reflects off human skin versus being absorbed into body tissues. Researchers found that on average, 50% of microwave energy bounces off the body surface in medical frequency ranges (460-2375 MHz), though this varies significantly based on individual skin and fat thickness.

Why This Matters

This foundational research reveals a critical aspect of how microwave radiation interacts with human tissue that remains relevant today. The finding that 25-76% of microwave energy can reflect off the body surface means the remaining energy penetrates into tissues, where it can cause biological effects. What's particularly striking is how much individual variation exists based on skin and fat thickness - essentially, your body composition determines your radiation exposure level.

While this study focused on medical applications, the same physics applies to everyday microwave sources like WiFi routers, cell phones, and microwave ovens operating in similar frequency ranges. The reality is that your personal anatomy significantly influences how much radiation your tissues absorb, yet safety standards treat all bodies the same. This research demonstrates why one-size-fits-all exposure limits may not adequately protect everyone, especially those with thinner skin or less subcutaneous fat.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
A. R. Livenson (1968). DETERMINATION OF THE COEFFICIENT OF REFLECTION FOR MULTILAYERED SYSTEMS OF BIOLOGICAL TISSUES IN THE MICROWAVE RANGE.
Show BibTeX
@article{determination_of_the_coefficient_of_reflection_for_multilayered_systems_of_biolo_g4279,
  author = {A. R. Livenson},
  title = {DETERMINATION OF THE COEFFICIENT OF REFLECTION FOR MULTILAYERED SYSTEMS OF BIOLOGICAL TISSUES IN THE MICROWAVE RANGE},
  year = {1968},
  
  
}

Quick Questions About This Study

On average, 50% of microwave energy in the 460-2375 MHz range reflects off the body surface, meaning the other half penetrates into tissues. This percentage varies significantly based on individual skin and fat thickness characteristics.
Yes, significantly. At 460 MHz, reflection can vary from 35-65% depending on skin and fat thickness. At 2375 MHz, the range is even wider at 25-76%, meaning absorption varies dramatically between individuals.
The study focused on medical microwave frequencies from 460-2375 MHz. These frequencies overlap with many common wireless devices today, including WiFi, Bluetooth, and some cell phone bands that operate in similar ranges.
Yes, the study found that a quarter-wavelength matching layer, like a 1 cm Mycalex plate, significantly increases the percentage of microwave energy absorbed by body tissues during therapy applications.
Individual differences in skin thickness and subcutaneous fat create varying electrical properties that affect how microwaves interact with tissue. Thicker fat layers generally increase reflection, while thinner skin allows more penetration.