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Electric emissions from electrical appliances.

N Leitgeb1, R Cech, J Schröttner

  • 1Institute of Clinical Engineering with European Notified Body of Medical Devices, Graz University of Technology, Inffeldgasse 18, Graz, Austria. norbert.leitgeb@tograz.at

Radiation Protection Dosimetry
|December 18, 2007
PubMed
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Household electric appliances emit significant electric fields, often exceeding reference values. Testing is crucial as current safety standards may not adequately protect against combined electric and magnetic field exposure.

Area of Science:

  • Biophysics
  • Electrical Engineering
  • Public Health

Background:

  • Electric appliance emissions are often disregarded, with standards assuming compliance without testing.
  • Existing safety standards may not fully account for real-world electromagnetic field exposures.

Purpose of the Study:

  • To investigate electric field emissions from household appliances.
  • To assess compliance with safety standards and the adequacy of current testing protocols.
  • To evaluate the impact of combined electric and magnetic field exposure on induced current densities.

Main Methods:

  • Measured electric field levels from 122 household devices across 63 categories.
  • Utilized numerical dosimetry with homogeneous human models.
  • Calculated induced intracorporal electric current densities and correction factors for inhomogeneous fields.

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Main Results:

  • Electric field levels from appliances frequently exceeded reference values, up to 11-fold.
  • Calculated factors were insufficient to guarantee compliance with basic restrictions without testing.
  • Simultaneous electric and magnetic field emissions necessitate consideration of superposition effects on induced currents.

Conclusions:

  • General disregard for electric emissions from household appliances is not justified.
  • Current testing methods may be inadequate for ensuring safety due to combined field effects.
  • Superposition of induced current densities from both electric and magnetic fields requires further consideration in safety standards.