making mosquito high frequency to repel

Then who were you talking to? I am the one who made the statements that were supported by Michael Kellet. No one on a blog speaks in a vacuum. If you want to do that, PM.

ok.  Did not think I would have to explain something like this.

And please do not think that my response is in any way trying to put you down.

I started my response with @ someone.  That means my response was direct to a specific person not to you.

Someone responded directly to me,  I responded to directly to that person.  Regardless of who said what, it was directed to a specific person that was directing to me.

@ michaelkellett

Why, in the face of evidence to the contrary, are you so convinced that you should take someone's failure as written in stone.

Have a nice day

IMO

Rick asked a question and indicated what the intended application was for.

There were answers provided that indicate that while he might be able to generate the frequencies, it is unlikely to achieve the result for which he wants it to.

Personally, I would appreciate that someone took the time to say the result won't work, and give some pretty good sources and explanations why it didn't as well.

I'm pretty sure from what I read in the link posted by Michael Kellet, that it wasn't one persons failure, it was multiple.

Some of the radio broadcast ones are highly likely to fail due to bandwidth limitation along with the performance of the radio and speaker, but other test show that Electronic Repellent fails to deliver the result.

So the question to Rick (assumming he is still listening)

Do you have some other reason to try this (science experiment, thesis exploration) or was it an attempt to make something that retails somewhere else.

Mark

@chinino

I'm not sure they were replying, as much as adding to the bottom of the conversation.

Only lately I have deliberately tried to reply to the part of the message thread I needed to.

In the past I simply replied at the bottom, then had trouble quoting.

Mark

Even if evidence abounds, I think it's good science to confirm things, especially if you run the tests slightly differently than was done before. Worst case, you'll have more evidence that shows it doesn't work

I just ran into a relevant quote today on this website:

"...back in the Middle Ages, people came up with all sorts of ideas that were commonly thought to be true and were even put into print, but were never tested, never verified."

They have some cool examples too. Of course, for all I know this could all be made up fairy tales, so it could probably use verification and retesting too

But hey, imagine where we'd be today if nobody dared to retry a few things that were previously thought to be impossible.

Cheers,

-Nico

I have a schematic that produces the higher frequency sounds ideal for dispersal of rodents, mosquito's or other animals just do not come any closer devices

The way I see it is that if some one asks for help to climb over a fence the proper thing for me to do is to point out that there is a cliff on the other side before I lend him my ladder.

I did say that  if some reasonable reference material suggesting the kind of sounds that would deter mosquitos was provided I would help the OP to design a device.

The offer (and the implied challenge) still stand.

MK

i will send a sch to do and change the capacitor to set right value to your frequency to block out mosquitos

i will send a sch to do and change the capacitor to set right value to your frequency to block out mosquitos

This has been a fun thread. Generally it's accepted that mostquitos are not repelled by high frequencies, however at enough sound pressure you could no doubt damage them! :-) That said, there are lots of fun things you can do an ultrasonic speaker, and a system for generating various frequencies. (and it does annoy dogs so be ready for them to 'sing along' :-) One of my favorites is to take two ultrasonic speakers and have them emit a sinusoid at the same frequency (say 30kHz to be safely out of most people's hearing). Then set them up in a room pointing at different walls. This will create a bunch of standing waves where the sounds overlap.

Now frequency modulate one the speakers with a recognizable audio signal and walk around the room. What you will hear are pockets where the audio is very clear and seems to "spring" right out of the air. Its very creepy and great for a seance party. Other fun things you can do are create air cavities in a 2-liter bottle and set them on a counter, modulate the frequency until you find the resonant frequency of the bottle cavity. Great fun to watch the bottles jump around.

Needless to say, you will be having so much fun you will forget all about the mosquitos.

Chuck

That frequency modulating seems to be the method used for the range of speakers that are highly directional.

http://www.holosonics.com/ is one of a few around.

Must remember this trick for another day.

Thanks

Mark