"air is our first         
nutriment & medicine"         
(Hippocrate, 400BC)         
Print E-mail


The “ 50Hz Alternative Electromagnétic Fields”



1. Introduction

2. Impact of 50Hz AEMFs on human health

3. Norms

4. Recommandations


1. Introduction


Our brain emits pulsed waves of extremely low frequencies, between 0.5 and 425. The following table gives an overview of the different wave types that are emitted during the day and during the night by our brain.


Frequency range


Wave name

Physiological state

0.5-4 Hz



Deep sleep

4-7 Hz



Sleep with dream

7-12 Hz




Relaxation, Concentration

Synchronous activity

12-25 Hz


Normal activity

Fast desynchronous activity


It is consequently important that our brain frequencies are not disturbed by other waves of extremely low frequencies, the most present one being the 50Hz electromagnetic waves emitted by electrical cables and apparatus.




 pulsed wave

(in our brain and in our atmosphere)

alternative electromagnetic wave

(electrical cables and apparatus)



An electrical apparatus or lamp, switched off with a unipolar switch, emit a 50 Hz alternative electrical field, expressed in Volt per meter or V/m. This field is neutralized with a bipolar switch.


A switched on apparatus or lamp emits also a 50Hz alternative magnetic field, expressed in milliGauss of mG.


2. Impact of 50Hz AEMFs on human health


2.1. Fundamental deregulation mechanisms:

  • Decrease of the oxygen uptake due to red blood cell aggregation (Dr Varga, Heidelberg University)
  • Perturbation of the electrical membrane potential (Lidbury, 1993)
  • Perturbation of the electrical activity of the brain (Bell, 1992)
  • Genetic perturbations (Delgado, 1982; Khalil, 1993)
  • Oxidative Stress (Adey, 1995)

2.2. Physiological effects

Several scientific and epidemiological studies have succeeded in establishing 50Hz AEMF thresholds from which the risk to contract a specific disease becomes significant. Hereafter a couple of examples:




From :


Weakening of the immune system with apparition of cancer


Bonhomme-Faivre (1996),

Floderus (1992), Feytching (1993), Olsen (1993)

Weakening of the endocrine system with suppression
of the melatonin production



Lidbury (1993)

Perturbation of the cardiovascular system with arrhythmia

 and risk of infarcts



Savitz (1992)

Risk of miscarriage


Juutilainen (2002)


2.3. Psychological effects




From :


Fatigue, sleep trouble, migraine



Danze (2004)

Depression, suicide, epileptical troubles


Verkasalo (1997), Danze (2004)


3. Norms







U.S. (ICNIRP, 1990), E.U. (1999)

- exposition during 8h/d

- short exposure (a couple of hours)








Swedish norms PRP90 (1999)

at 30cm distance






Our recommendations:

- day

- night








According to these ICNIRP and European norms, there is no risk to live just under a Very High Tension Line …although scientific studies find pathology threshold at intensities 2500 times lower.


4. Recommendations


It is mainly during the sleep phase that all sources of 50 Hz AEMF must be moved away from our body. Therefore, we advise:

1.      to place all the electrical apparatus at 1.5m from the body

2.      to connect those apparatus on a multisocket extension cable protected by bipolar switches



Most of electrical apparatus, such as a bed lamp, are equipped with unipolar switches. Since one wire is not cut, it carries the tension of the network up to the lamp, what can provoke the emission of an A.E.F. as high as 100V/m at 50cm.


One solution is to replace the unipolar switch by a bipolar switch


If several apparatus must be equipped with a bipolar switch, the easiest solution is to connect them on a multisocket extension cable with bipolar switches (marque: Chacoon, available in every Brico):


If all the apparatus, even switched off, emit A.E.F. of 20V/m, one possible cause is the bad quality of the “ground connection” that has to be legally lower than 30 Ohm. Ideally, it must be lower than 7 Ohm.


In order to identify too high current losses, the electrical circuits are protected by 2 differentials that are located in the electrical cabinet :

  • 0.03A for the bath rooms and laundries
  • 0.3A for the other rooms

Activation tests of these differentials must be occasionally performed in order to check their good working



© 2008 Air Quality Concept