shielding values

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SArjuna

shielding values

The following is from the Aaronia site, electrosmog.com
I have absolutely no connection with this company. But I am very
interested in shielding, so wanted to share this. (Just part of what's on their
site.)
Have any of you used their different shielding materials? Which and
for what, and how did it go?
Thanks,
Shivani

from Aaronia:
The 99% Lie - or why a high level of shielding is so important:
Many manufacturers and retailers try to outwit their customers with
percentages. They give you particulars such as "90% (10dB) or 99% (20dB) shielding".
This is to impress the potential customers with an allegedly high shielding
factor. And often the appendant frequency is either not stated at all or only in
form of attenuation information for "low" frequencies (MHz range or 1-2GHz).

It is the case of high frequency, however, where you can really see what
shielding can do. But here many screening systems unfortunately show dramatic
losses!

Rigorous health-related threshold values are nowhere near adhered to with
lower shielding values such as 90% or even 99% - always depending on the existing
strain. Especially those persons with a high sensitivity to electricity,
however, depend on the adherence to these threshold values and recommendations.

Not only a percentage reduction, but rather the attainability of such values
should always be the target for a shielding system. This is a huge difference!

Only when you reach shielding levels of 99.999% (50dB) ore more! Will these
values be attained for most parts. And often, levels of over 50dB, such as
Aaronia X-Dream offers, are necessary (up to 100dB).

So, it is of the UTMOST importance how many 9s are behind the point when you
evaluate information given in percentage. Each "9" signifies a better
shielding effect by 10dB. So please, do not let such figures fool you!

You should, from the start, pay attention to the data given in dB -
especially for high GHz ranges (starting from 10 GHz you can see what a shielding
system can do!). These dB figures are a lot more neutral in their expressiveness
than the supposedly high percentages. In addition, in dB it is a lot easier to
calculate the shielding effectiveness.

The following example will show you the importance of a high protection
level:
Table1: Sound level overview in dB(A):
Example: dB(A) value: Perception/Impact: Shielding example:
Jet plane 130dB(A) Hearing loss even after short exposure
Jackhammer 120dB(A) VERY PAINFUL
Rock band, Disco 110dB(A) PAINFUL
Manipulated vehicle 100dB(A) UNBEARABLE Assumed normal electrosmog exposure
Buzz saw 90dB(A) UNBEARABLE Shielding of 10dB (90%)
Heavy traffic freeway, daytime 80dB(A) Hearing loss from 85dB Shielding of
20dB (99%)
Main road, daytime 70dB(A) Circulatory diseases Shielding of 30dB (99,9%)
Main road, at night 60dB(A) VERY NOISY Shielding of 40dB (99,99%)
Quiet residential area, daytime 50dB(A) Communication disorders. Shielding of
50dB (99,999%)
Quiet residential area, at night 40dB(A) Learning and concentration disorders
Shielding of 60dB (99,999.9%)
Ticking alarm clock 30dB(A) Sleeping disorders Shielding of 70dB (99,999.99%)
Rustle of leaves 20dB(A) Quiet Shielding of 80dB (99,999.999%)
Normal breathing 10dB(A) Very quiet Shielding of 90dB (99,999.999.9%)
Zero 0dB(A) Quiet up to 1dB(A) Shielding of 100dB (99,999.999.99%)

Note: With the attenuation factor dB, each increase of 10dB results in a
tenfold increase of the value. Therefore, for example 100dB is ten times more than
90dB or 100 times more than 80dB etc.

In our example we would like to equate the regular strain of electrosmog with
the noise exposure of a manipulated vehicle (see table 1) at 100dB(A). If you
could reduce the noise with the help of our shielding systems this would lead
to the following arithmetic problem:
With the application of a shielding system with an attenuation level of 99%
(20dB) you would be left with a sound level of 80dB(A). And it would come close
to a hearing loss at 85dB(A).
Even if you use a shielding system with 99,9% (30dB) you would still be left
with a sound level of 70dB(A). This is equivalent to standing at a main road
and would eventually lead to circulatory disease.
If, however, you use a shielding system with an attenuation level of 99.999%
(50dB like Aaronia-Shield) you would be left "only" with a sound level of
50dB(A). This would be equivalent with the noise at a street in a quiet
residential area.
A shielding of 100dB, which you can achieve with our Aaronia X-Dream, you
would attain a "perfect" shielding effect.

[Non-text portions of this message have been removed]

charles-4

Re: shielding values

Hello Shivani,

it is still not clear to you.

Aaronia is a company, who promishes more than they can deliver.
Of course, they make superb websites.

They buy materials from other companies, claim that they are their own, and
add values to those materials, that are not true.

They bought GE-S from Biologa (although not directly).
Biologa claims 20 dB shielding.
Aaronia gave me a curve of their A2000 with 30 dB.
Later they placed the same curve in their leaflets.
Then they had to go to court, and the judge decided, that only 20 dB was the
shielding factor.

Aaronia claims that no other company has materials that shield 50 dB, but
Biologa does have them in their catalogue.

The matter of percentages and dB is indeed confusing.

There are several companies that sell shielding materials, but all those
materials are tested with the University of the German Army, prof. Pauli.
He delivers protocolls, with values in percentages as well as dB.
I like values in dB.
There is even a booklet with many materials, by prof. Pauli and dr. Moldan,
all values in % as well as in dB.
So we think it is important that most shielding materials are tested by an
independant, objective and honest institute.
Btw. 90 % is 10 dB, 99 % is 20 dB, 99,9 % is 30 dB, and 99.99 % is 40 dB.

Aaronia with their big mouth claims that their materials are tested by prof.
Pauli, but in reality they are not, and there are no protocolls by him
either.
They are very clever. If you look at the A2000+, it is said: *measurements
confirm the good shielding*. No mention of Pauli. And only Aaronia products
are compared here!
If you look at Aaronia shield, it says under the curves: *Independant
measurements by Pauli confirm the better shielding of Aaronia Shield
compared to the other products*. The other products are from Biologa, and
they are tested. But not the Aaronia Shield.

If you look at websites of Biologa, Yshield, Borr, Marburg, they all have
the curves from the protocolls in their catalogues.
If you want copies, all those companies send them to you. Not Aaronia.
Even on distributers websites, like www.vitalitools.nl , the curves are to
be seen by everybody.

It is a pity, that you do not want to take a glimpse on the Aaronia Courts
Dossier, placed on www.gigahertz-solutions.de

Greetings,
Charles Claessens
member Verband Baubiologie
www.milieuziektes.nl
www.milieuziektes.be
www.hetbitje.nl
checked by Norton Antivirus

----- Original Message -----
From: <[hidden email]>
To: <[hidden email]>
Sent: Monday, January 23, 2006 21:14
Subject: [eSens] shielding values

>
>
> The following is from the Aaronia site, electrosmog.com
> I have absolutely no connection with this company. But I am very
> interested in shielding, so wanted to share this. (Just part of what's
> on their
> site.)
> Have any of you used their different shielding materials? Which and
> for what, and how did it go?
> Thanks,
> Shivani
>
> From Aaronia:
> The 99% Lie - or why a high level of shielding is so important:
> Many manufacturers and retailers try to outwit their customers with
> percentages. They give you particulars such as "90% (10dB) or 99% (20dB)
> shielding".
> This is to impress the potential customers with an allegedly high
> shielding
> factor. And often the appendant frequency is either not stated at all or
> only in
> form of attenuation information for "low" frequencies (MHz range or
> 1-2GHz).
>
> It is the case of high frequency, however, where you can really see what
> shielding can do. But here many screening systems unfortunately show
> dramatic
> losses!
>
> Rigorous health-related threshold values are nowhere near adhered to with
> lower shielding values such as 90% or even 99% - always depending on the
> existing
> strain. Especially those persons with a high sensitivity to electricity,
> however, depend on the adherence to these threshold values and
> recommendations.
>
> Not only a percentage reduction, but rather the attainability of such
> values
> should always be the target for a shielding system. This is a huge
> difference!
>
> Only when you reach shielding levels of 99.999% (50dB) ore more! Will
> these
> values be attained for most parts. And often, levels of over 50dB, such as
> Aaronia X-Dream offers, are necessary (up to 100dB).
>
> So, it is of the UTMOST importance how many 9s are behind the point when
> you
> evaluate information given in percentage. Each "9" signifies a better
> shielding effect by 10dB. So please, do not let such figures fool you!
>
>
> You should, from the start, pay attention to the data given in dB -
> especially for high GHz ranges (starting from 10 GHz you can see what a
> shielding
> system can do!). These dB figures are a lot more neutral in their
> expressiveness
> than the supposedly high percentages. In addition, in dB it is a lot
> easier to
> calculate the shielding effectiveness.
>
> The following example will show you the importance of a high protection
> level:
> Table1: Sound level overview in dB(A):
> Example: dB(A) value: Perception/Impact: Shielding example:
> Jet plane 130dB(A) Hearing loss even after short exposure
> Jackhammer 120dB(A) VERY PAINFUL
> Rock band, Disco 110dB(A) PAINFUL
> Manipulated vehicle 100dB(A) UNBEARABLE Assumed normal electrosmog
> exposure
> Buzz saw 90dB(A) UNBEARABLE Shielding of 10dB (90%)
> Heavy traffic freeway, daytime 80dB(A) Hearing loss from 85dB Shielding of
> 20dB (99%)
> Main road, daytime 70dB(A) Circulatory diseases Shielding of 30dB (99,9%)
> Main road, at night 60dB(A) VERY NOISY Shielding of 40dB (99,99%)
> Quiet residential area, daytime 50dB(A) Communication disorders. Shielding
> of
> 50dB (99,999%)
> Quiet residential area, at night 40dB(A) Learning and concentration
> disorders
> Shielding of 60dB (99,999.9%)
> Ticking alarm clock 30dB(A) Sleeping disorders Shielding of 70dB
> (99,999.99%)
> Rustle of leaves 20dB(A) Quiet Shielding of 80dB (99,999.999%)
> Normal breathing 10dB(A) Very quiet Shielding of 90dB (99,999.999.9%)
> Zero 0dB(A) Quiet up to 1dB(A) Shielding of 100dB (99,999.999.99%)
>
> Note: With the attenuation factor dB, each increase of 10dB results in a
> tenfold increase of the value. Therefore, for example 100dB is ten times
> more than
> 90dB or 100 times more than 80dB etc.
>
> In our example we would like to equate the regular strain of electrosmog
> with
> the noise exposure of a manipulated vehicle (see table 1) at 100dB(A). If
> you
> could reduce the noise with the help of our shielding systems this would
> lead
> to the following arithmetic problem:
> With the application of a shielding system with an attenuation level of
> 99%
> (20dB) you would be left with a sound level of 80dB(A). And it would come
> close
> to a hearing loss at 85dB(A).
> Even if you use a shielding system with 99,9% (30dB) you would still be
> left
> with a sound level of 70dB(A). This is equivalent to standing at a main
> road
> and would eventually lead to circulatory disease.
> If, however, you use a shielding system with an attenuation level of
> 99.999%
> (50dB like Aaronia-Shield) you would be left "only" with a sound level of
> 50dB(A). This would be equivalent with the noise at a street in a quiet
> residential area.
> A shielding of 100dB, which you can achieve with our Aaronia X-Dream, you
> would attain a "perfect" shielding effect.
>