DC electrical fields (electrostatics)
When a neutral or uncharged object is separated into positively and negatively charged particles, an electrostatic field is created.
This separation of charges, for example, can occur when the same or different materials rub against each other.
Often these electrostatic fields arise from plastic and synthetic materials as
found in clothing, carpeting, or drapes, and on the surface of furniture and floor coverings, as well as on screens.
Natural static electricity arises when particles in the air rub against each other, e.g. in clouds. When the potential
difference between the potential built up in the clouds and the one of the earth's surface becomes too large, it will discharge
as lighting. In everyday life this type of "sparking" or "discharge," for example, occurs when a person receives an "electric shock" while touching a car door.
There is another aspect of static electricity, which is very important. Electrostatic charges change the indoor climate because these charges impact the composition of air ionization.
Dust, irritants, or allergens, for example, are attracted by charged materials.
Using as few synthetic materials as possible and maintaining a sufficiently high humidity level will improve this situation (or indoor climate).
DC or static electrical fields are measured as electrical field strength in volt per meter (V/m) or as surface potential in volt (V).
DC magnetic fields (magnetostatics)
The largest static magnetic field is the naturally occurring magnetic field of the earth. The earth acts as a giant bar magnet. Humans have grown accustomed to and adapted to
this natural geomagnetic field for the past thousands of years.
As soon as this natural field is changed or distorted by, for example, direct current from streetcars or magnitizable metals, this will have an impact on our body.
Innerspring mattresses or metal parts in the bed frame or base, radiators or steel beams in the wall can pose an unusual "magnetic field situation" for humans.
Exposure to these human-made static magnetic fields induces electrical currents in the human body that are superimposed upon the body's own electrical currents and may
result in electromagnetic interference.
If these sources of interference cannot be eliminated, you are well advised to keep as large a distance as possible to them. This change in magnetic fields can be observed by
the deviation of a compass needle (in degrees) from the field lines of the natural earth's magnetic field or by a change in the magnetic flux density (in tesla or microtesla).
Static magnetic fields are measured as a deviation of the compass needle from the field lines of the natural earth's magnetic field in degrees (°) or as a change in magnetic flux density in tesla (T) or microtesla (µT).
ELF electromagnetic fields...