Short Videos about Grounding, Shielded Fabrics, and Measuring EMFs

This page shows short videos to explain some of the common questions thought of regarding living with EMF sensitivities.

There is also a list at the bottom of this page – of links to other posts on our website which have relevant short videos mentioned within them too.

Note 1: There are no affiliate links in this post. We do not sell EMF-related items.

Note 2: We’ve embedded some videos from others on this post too.

Answering Some Questions

Where do electrical fields exist? And where do these go?

Video length: 3:11 minutes

What is Grounding? And do shielded fabrics reduce or increase emfs?

Simply put, grounding is the removal of electrons (negatively-charged particles). Shielded fabrics – this video shows advantages and disadvantages. Also, it shows a difference between household grounding versus to using real earth ground for measuring accurately with a multimeter. This video addresses a few science and practical questions encountered in managing today’s manmade electromagnetic frequencies (emfs). Length: 13:31 minutes

Can Human Skin Conduct Electricity?

Here is a short video from someone teaching about physics to show that a human body skin can conduct voltage, as can water. (It is like the demonstration sometimes shown at science fairs where people hold hands in a line with a low-electrical power source at one end of the line and a small lightbulb at the other end of the line and then a circuit gets completed to turn the lightbulb “on”.)

Real Life Measuring of EMFs (demonstrations)

For a one-page excerpt of the Building Biology guidelines for levels of concern for electrical fields, magnetic fields, and radio-frequency radiation, you can click here: Highlighted Building Biology page.

If you’re interested in the radio-frequency radiation measuring done in our videos, the Acoustimeter Manual, a pdf with diagrams (e.g. pages 11, 16, 19-21) is available at this link: Acoustimeter Manual. (A Safe and Sound Pro II is a similar meter.)

If you’re interested in the other measuring tools mentioned in the videos, they are:

a Body Voltage Meter (for measuring electrical fields)
an Alpha Gaussmeter (for measuring magnetic fields)

(It is more accurate for measuring to use “dedicated” meters – in other words, ones which measure just one kind of emf instead of all of them in one machine.)

The short videos below show how wireless signals (microwaves) can be measured and how electrical fields and magnetic fields can be measured with tools that detect these levels of electromagnetic frequencies.

Tools for measuring emfs in real life, briefly explained –

(video to be added here when it gets edited)

Measuring Electric and Magnetic Fields in Real Life –

on a metal stockpot, using a hairdryer, and a sewing machine (two-prong plugs). (Note: The metal stockpot is not an appliance but instead shows as an antenna for electrical fields in the environment due to stray voltage in the home. If that situation was corrected, the stockpot would not show this level of electrical fields.) Length: 5:44 minutes

2. What do stray voltage issues look like in a building? This video shows measuring electric fields (“skin voltages”) in a room and voltage on the wires at the panel, when the main breaker (MEP) is turned “on” versus when it is flipped “off”. (It also shows why reducing electrical fields in a house isn’t always a simple as turning off the power at the breaker.) The stray voltage in this example is about 8 volts (when it should be around 0 volts). Length: 6:04 minutes

Q: How much deviation from “0 Volts” is OK, for “ordinary people” or for sensitive people or cows?

A: Research studies in the 1980s and since (at university levels and professional engineering levels) have shown that 0.3 to 0.5 Volts on the neutral can cause problems with dairy cows and sensitive people. (That is 300-500mV.) When dairy cows are facing a muscle-related issue to stray voltages, we might read of numbers being 0.4 V or 1.0 V or 2.0 V coming in the wiring in their barn, to the extent that those sorts of levels are known to need investigation and a solution to reduce such.

In terms of electrical field measurements, 300mV and above can cause concern for sensitive people. (Some would say anything above 100 mV.) Above 500mV, it is of concern to the general, ordinary person, especially if over 1V (1000 mV), according to building biology standards. Over 500mV in sleeping areas is the point where a number of people begin to notice some sort of health issue starting (e.g. poor sleep quality and/or of muscle issues of twitching or weakness).

Sources of information for these include those mentioned on our “Stray Voltage” blog post linked here (such as agricultural concerns as well as places such as the Electrical Safety Authority (ESA), etc.), and document pdfs provided by the Ronk Blocker manufacturer engineer to us of research testing of their product.