[Sugar-devel] [IAEP] Turn your frequency generator into a super powerful mosquito repeller

[Sean Linton]

Hi Caryl,

Just curious to know if you tried any experiments with your computers and
insect problem. I note that some antenna are useful at fractions of the wave
length too, like 1/2 or 1/4 so there is a broader spectrum that could be
experimented with there.

Sean

On 8 July 2011 18:08, Caryl Bigenho <cbigenho at hotmail.com> wrote:

>  Hi....
>
> Let's put this to a test!
>
> With all the flooding we are having in Montana this summer the clouds of
> mosquitos are really fierce! Our family is visiting with their PCs and I
> have a Mac.  We can try this in the next couple of days and see if it really
> works. It says it can be barely audible. I was curious to see how low these
> notes would be and found this interesting chart (link below). Many of the
> instruments listed are no longer in daily use and exist mainly in museums,
> but some, such as the bass viol and bassoon are very common. In fact, my
> husband has his bassoon here with him in Montana!  But, I don't think he
> wants to play a continuous low note... he has better things to do! We can
> find an appropriate tone generator for our test.
>
> http://www.contrabass.com/pages/frequency.html
>
> <http://www.contrabass.com/pages/frequency.html>Caryl
>
> > Date: Fri, 8 Jul 2011 15:34:30 +1000
> > From: quozl at laptop.org
> > To: sean at lpnz.org
> > CC: olpc-oceania at lists.laptop.org; iaep at lists.sugarlabs.org;
> sugar-devel at lists.sugarlabs.org; develop at worldclassproject.org.uk
> > Subject: Re: [IAEP] [Sugar-devel] Turn your frequency generator into a
> super powerful mosquito repeller
>
> >
> > The speakers don't work very well at the frequency range specified by
> > that article for mosquito repelling; 45 Hz to 67 Hz.
> >
> > The article fails to mention how much sound is needed; e.g. in dBm. It
> > gives a subjective measure only.
> >
> > Other articles on the site mention secrets of ancient geometry and
> > crystal harmonizers. This really doesn't impress me. Is there any
> > evidence base for repelling mosquitos using low frequency sound? Is
> > there any evidence that enough of the population of mosquitos is
> > repelled? All it takes is for one strain to not be repelled and it will
> > breed up.
> >
> > --
> > James Cameron
> > http://quozl.linux.org.au/
> > _______________________________________________
> > IAEP -- It's An Education Project (not a laptop project!)
> > IAEP at lists.sugarlabs.org
> > http://lists.sugarlabs.org/listinfo/iaep
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sugarlabs.org/archive/sugar-devel/attachments/20110721/e1956883/attachment.html>