making mosquito high frequency to repel

Former Member over 12 years ago

I was hoping to get advice on how to generates high frequency sound that may repel mosquitoes.

Any ideas on this project ???

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Former Member over 12 years ago in reply to groaker +2

Dont let someone else's failure hold you back. Give it a shot. you may want to ry different frequencies or multiple frequencies.High, higher, or lower. Give it a try.
groaker over 12 years ago +1

A number of studies have demonstrated that high frequency sounds do not repel mosquitos. This bit of folklore probably came about between the presence of bats, of which some species are prodigious eaters…
michaelkellett over 12 years ago in reply to Former Member +1

@chinino Why, in the face of evidence to the contrary, are you so convinced that some noise at some high frequency will upset mosqitos. ? Here is a link to supplement Michael Tria's post. http://www.bbc…

Problemchild over 12 years ago in reply to mcb1

So as any one confirmed or otherwise the fact that our insect friends are discouraged by the ultrasound?
To be hoest I'm not even sure about the rodents, I know that Dogs don't like it and do start barking which isn't what you realy want I'm sure.:)
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mcb1 over 12 years ago in reply to Problemchild

John
I think the article that was linked to tended to suggest that they weren't discouraged.
However there are some that still think there is something the tests missed ....

Of course the spray companies would love to continue selling, so anything that is a one time purchase is not in their interest.

Rodents are probably like Dogs and Cats especially since they do use hearing to good effect and have similar ear structures (on the outside anyway), and are likely to NOT like ultrasonics.
If anyone thinks I'm wrong about mosquitoes and hearing, please send me a picture showing those large ears that are able to be turned ....

Not that we have mosquito issues, but we use one of the feramone auto sprayers to keep the smaller flies outside, and that works well.

mark
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Problemchild over 12 years ago in reply to mcb1

Thinking about it I remember ones that DX.com sold that claimed to work because they sounded similar to the male mosquito and this kept others away.

To be honest this circuit is so simple then you would be best not to belive any one but to try it out..
It would make a good project and video
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Problemchild over 12 years ago in reply to Problemchild

How about going to Pat Kelly's page and putting an idea on this now very long LPC800 thread

http://www.element14.com/community/docs/DOC-54622#comment-24214

Get a free dev board from them and put the amp and speaker on it. You can easily vary and experiment withe the output frequencies with your free Swag !!

Vive over engineering!!
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Former Member over 12 years ago in reply to Former Member

We need to find the frequency that affects the insect ??? Is there a range that relates to bugs?
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michaelkellett over 12 years ago in reply to Former Member

To get anywhere with this you will need to do some serious research:

Try this for starters:

http://www.ksre.ksu.edu/grsc_subi/Research/archives/2001_ESA_Meeting_Posters/contents/SCJ%20talk.pdf

There is a lot of research material on the web - you could do worse than read this article and replicate their experimental noise maker. They do not discuss mosquitos but they do give some information about which types of insect might be most affected.

It certainly seems that most of the device on the market are not effective but that for some species effective devices might be possible.

MK
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Former Member over 12 years ago

Michael kellett good pdf document to do a research about some animals and insects to set u a device thx a lot
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