> Thank you Charles,
>
> I will have a look at those. In the meantime, I also found this:
>
> http://www.scantekinc.com/frequency.htm
>
> (Scroll down to the meter named "NA-18")
>
> R.
>
> --- In [hidden email], "charles" <charles@...> wrote:
>>
>> You have to scroll down to the bottom of the page.
>>
>>
>> Waves around 100 kHz are far beyond the hearing possibilities.
>> And they are not regarded as infrasound.
>> Infrasound is between 0 Hz and 20 Hz.
>>
>> And one has to distinguish between sound and vibrations.
>>
>> And both can be measured easily with what I have written in *het bitje*.
>>
>> Greetings,
>> Charles Claessens
>> member Verband Baubiologie
>> www.milieuziektes.nl
>> www.milieuziektes.be
>> www.hetbitje.nl
>> checked by Bitdefender
>>
>>
>>
>> ----- Original Message -----
>> From: "Bill Bruno" <wbruno@...>
>> To: <[hidden email]>
>> Sent: Friday, February 20, 2009 12:36 AM
>> Subject: Re: [eSens] Infrasound detector - does it exist?
>>
>>
>> > Thanks Charles but I don't see any September 2008 issue at that link.
>> >
>> > One theory I heard from A. Firstenberg is that the hum is caused
>> > by LORAN-C, an-obsolete but still operating navigational system
>> > that I think operates with electromagnetic waves around 100kHz.
>> >
>> > I have heard of infra-sound detectors. I think I saw instructions on
>> > how to make one. Basically a special microphone, but you also need
>> > equipment to analyze the output (or send to your computer?). I think
>> > it's possible some ventilation systems can vibrate through a whole
> city.
>> > Look up "Taos hum" and you'll find some experiments, but not quite
>> > conclusive if I recall.
>> >
>> > Refrigerators and things like that can also be a factor. Putting
>> > industrial
>> > rubber dampers under the feet might help. Although I often
> experience
>> > such
>> > a phenomenon with the fridge off, and our house is on a big lot.
> Wind
>> > over
>> > vent pipes I think is also considered a possibility.
>> >
>> > Wish I knew...
>> > Bill
>> >
>> > On Thu, Feb 19, 2009 at 3:25 PM, charles <charles@...> wrote:
>> >
>> >> Read the two September 2008 issues of *het bitje*.
>> >>
>> >> http://www.milieuziektes.nl/Pagina10.html
>> >>
>> >> Look also for the Humsimulator at:
>> >> http://www.milieuziektes.nl/Pagina114d.html
>> >>
>> >> Greetings,
>> >> Charles Claessens
>> >> member Verband Baubiologie
>> >> www.milieuziektes.nl
>> >> www.milieuziektes.be
>> >> www.hetbitje.nl
>> >> checked by Bitdefender
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "rticleone" <rticleone@... <rticleone%40yahoo.ca>>
>> >> To: <[hidden email] <eSens%40yahoogroups.com>>
>> >> Sent: Thursday, February 19, 2009 10:26 PM
>> >> Subject: [eSens] Infrasound detector - does it exist?
>> >>
>> >> > Some of you might remember that I posted a message some time
> ago about
>> >> > my mother who hears "the hum" (at least that's what we think it
> is),
>> >> > and experiences symptoms such as, hearing it, feeling a vibration,
>> >> > agitation, fatigue, etc...
>> >> >
>> >> > Infrasound was suggested as something to look up. It's been a while
>> >> > since I did - I can say we don't live remotely within the
> vicinity of
>> >> > wind turbines, and she can hear and feel it in our house (and
> certain
>> >> > other places, but not ever place, so she's obviously very
> sensitive to
>> >> > it) even with the power shut off. We have no TETRA or anything
> like
>> >> > that.
>> >> >
>> >> > I also wonder(ed) if, even though I don't notice it like she does,
>> >> > being in an environment where it's present could add to the
> negative
>> >> > things I experience.
>> >> >
>> >> > So - it leads me to ask: is there such a thing as an infrasound
>> >> > detector? (Other than a sensitive human being)
>> >> >
>> >> > Thanking you!
>> >> >
>> >> > R.
>> >> >
>> >> >
>> >> >
>> >> > ------------------------------------
>> >> >
>> >> > Yahoo! Groups Links
>> >> >
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > Yahoo! Groups Links
>> >
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
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