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Development of Near-Field Electric Energy Density Meter Model EDM-2

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Donald R. Belsher · 1975

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The EDM-2 meter development in 1975 helped establish scientific methods for measuring electromagnetic field exposure levels.

Plain English Summary

Summary written for general audiences

This 1975 technical report describes the development of the EDM-2, a specialized meter designed to measure electric energy density in near-field environments. The research focused on creating instrumentation capable of accurately detecting electromagnetic field intensity close to EMF sources. This work contributed to early efforts in quantifying electromagnetic field exposure levels.

Why This Matters

This technical development represents a crucial piece of EMF measurement history. The EDM-2 meter was designed during an era when scientists were beginning to recognize the need for precise electromagnetic field measurement tools. Near-field measurements are particularly important because they capture the highest exposure levels that occur close to EMF sources - exactly where people often find themselves with modern devices. The reality is that without accurate measurement tools like the EDM-2, we cannot properly assess exposure risks or establish meaningful safety standards. This 1975 work laid groundwork for the sophisticated EMF meters we rely on today to evaluate everything from cell phone radiation to power line emissions.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Donald R. Belsher (1975). Development of Near-Field Electric Energy Density Meter Model EDM-2.
Show BibTeX
@article{development_of_near_field_electric_energy_density_meter_model_edm_2_g4637,
  author = {Donald R. Belsher},
  title = {Development of Near-Field Electric Energy Density Meter Model EDM-2},
  year = {1975},
  
  
}

Quick Questions About This Study

The EDM-2 was specifically designed to measure electric energy density in near-field environments, where electromagnetic field intensity is typically highest close to EMF sources like transmitters or electrical equipment.
Near-field measurements capture the strongest electromagnetic exposures that occur close to EMF sources, which is exactly where people position themselves with devices like cell phones, laptops, and other electronics.
The EDM-2 helped establish scientific methods for accurately measuring electromagnetic field exposure levels, providing foundational instrumentation techniques that evolved into today's sophisticated EMF measurement tools and safety assessment protocols.
Electric energy density measures the concentration of electromagnetic energy in a specific area, providing a more comprehensive assessment of field intensity than simple electric or magnetic field strength measurements alone.
As electromagnetic technologies expanded in the 1970s, scientists needed precise measurement tools to quantify exposure levels, establish safety standards, and conduct meaningful health research on electromagnetic field effects.