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Muscle heating in human subjects with 915 MHz. Microwave contact applicator.

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DeLateur BJ, Lehmann JF, Stonebridge JB, Warren CG, Guy AW · 1970

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This 1970 study directly measured how 915 MHz microwaves heat human muscle tissue, providing early evidence of biological effects from microwave radiation.

Plain English Summary

Summary written for general audiences

This 1970 study examined how 915 MHz microwave radiation heats muscle tissue in human subjects using direct contact applicators. Researchers measured temperature changes in muscle tissue to understand how microwave energy penetrates and affects the human body. This early research helped establish fundamental data about how microwave frequencies interact with human tissue.

Why This Matters

This pioneering research from 1970 represents some of the earliest systematic investigation into how microwave radiation affects human tissue. The study's focus on 915 MHz is particularly relevant today because this frequency sits near the range used by many modern devices, including some industrial microwave applications and certain wireless systems. What makes this research significant is that it directly measured heating effects in living human subjects, not just laboratory models or animal studies.

The reality is that heating effects represent just one mechanism by which electromagnetic fields can affect biological systems. While this study focused on thermal effects that were clearly measurable in 1970, decades of subsequent research have revealed that EMF exposure can trigger biological responses at power levels far below those needed to cause detectable heating. Understanding these thermal thresholds remains important, but it's equally crucial to recognize that non-thermal effects may occur at the much lower exposure levels we encounter from everyday devices.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
DeLateur BJ, Lehmann JF, Stonebridge JB, Warren CG, Guy AW (1970). Muscle heating in human subjects with 915 MHz. Microwave contact applicator.
Show BibTeX
@article{muscle_heating_in_human_subjects_with_915_mhz_microwave_contact_applicator__g6681,
  author = {DeLateur BJ and Lehmann JF and Stonebridge JB and Warren CG and Guy AW},
  title = {Muscle heating in human subjects with 915 MHz. Microwave contact applicator.},
  year = {1970},
  
  
}

Quick Questions About This Study

Researchers used 915 MHz microwave radiation applied directly to human subjects through contact applicators. This frequency is close to ranges used by some modern wireless devices and industrial microwave applications.
The study used contact applicators placed directly on human subjects to deliver 915 MHz microwave energy while measuring temperature changes in muscle tissue to quantify heating effects.
This 1970 study established fundamental data about how microwave frequencies affect human tissue. It's relevant because modern devices operate at similar frequencies, though typically at much lower power levels.
Yes, this research directly tested 915 MHz microwave radiation effects on human subjects, making it valuable early evidence of how electromagnetic fields interact with living human tissue.
Contact applicators are devices placed directly on the skin to deliver focused microwave energy to specific body areas. This method allows precise measurement of heating effects in targeted tissues.