>Hello,
>
>for all who still believe that all this talk about laptops is old-women
>talks, I have placed on:
>http://www.milieuziektes.nl/Pagina109.html
>new sounds.
>I have played around with a Dell Latitude D600 laptop.
>At startup of the computer I have recorded the sounds emanating from this
>laptop, on the right part of the keyboard.
>After successful loading of Windows XP, I recorded the sounds from the left
>part of the keyboard.
>
>Those are the frequencies one has to endure in your lap.
>On your genitals.
>Do not think that your clothing will shield them.
>
>Nice huh ?
>
>
>Greetings,
>Charles Claessens
>member Verband Baubiologie
>www.milieuziektes.nl
>www.milieuziektes.be
>www.hetbitje.nl
>checked by Norton Antivirus
>
>
>
>----- Original Message -----
>From: "Garth Hitchens" <[hidden email]>
>To: <[hidden email]>
>Sent: Saturday, December 02, 2006 06:41
>Subject: Re: [eSens] Marc/Arjuna - beware laptops too - also blowdryers
>
>
> > Ok, to add one more opinion to the issue of Laptop computers.
> >
> > In my experience, using a laptop, especially on your lap, could be
> > asking for trouble, depending on the design of the laptop.
> >
> > One of the first devices that I found that I was electrically
> > sensitive to was a 17" Apple Powerbook G4 laptop. I would get
> > intense dizziness and tinnitus within minutes of using it, regardless
> > of whether it was plugged in or not. Using it on my lap
> > exacerbated the effect. Upon examining the magnetic field with a
> > spectrum analyzer, it put out a large amount of "repetitively pulsed
> > electronic noise" from directly below my left wrist near the keyboard
> > area.
> >
> > I ultimately had to stop using it due to the symptoms.
> > Interestingly, another person with a 17" powerbook G4 mentioned to me
> > independently that they had symptoms when using the laptop (again,
> > off power). This model is no longer produced, having been replaced
> > by the Intel-based MacBook and MacBook pro line.
> >
> > I have since extensively used an apple MacBook as well as a Macbook
> > Pro that LOOKS exactly like the Powerbook that gave me trouble, and
> > neither seems to cause me much trouble even when plugged in (all
> > computers bother me some). My spectrum analyzer still shows a fair
> > bit of noise, but at different frequencies and pulse rates.
> >
> > From this I conclude that it is not just using a laptop or not, or
> > if it is plugged in or not, but that the internal design of the
> > laptop can also have a profound effect. Although it sounds odd, I
> > have found that at least for the Apple laptops, the switch from
> > motorola G4 to Intel's CPU seemed to change things enough that my ES
> > is not triggered anywhere nearly as much.
> >
> > As Shivani has mentioned, the high frequency noise caused by internal
> > power conversion circuitry seems to be a key factor in ES issues.
> > While some of these are only active when the unit is powered by AC
> > power, most (like the flourescent display inverter, and dc/dc
> > inverters) are active anytime the laptop is in use, regardless of if
> > the unit is plugged in or not. And many of these are located just an
> > inch from your palms when you are using the laptop keyboard.
> >
> > As a result, I find my ES symptoms are least triggered by using
> > either the laptop OR a desktop computer with standard (external)
> > keyboard and mouse to keep my body away from the internals of the
> > computer as much as possible.
> >
> > Finally, I would mention that I have found it useful to keep the
> > actual power adapter unit for the laptop as far from my body as
> > possible when using a laptop "plugged in".
> >
> > Hope that is useful for someone. Of course, your mileage may vary.
> >
> > Garth
>