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You might try the local district attorney at this point? Your lawyer, or a mefi-ite would be able to better advise you here This would be much more effective than trying to muck around with an oscilloscope yourself. The cops genuinely felt the same effects. Perhaps I made it sound like they just didn't care before, but they actually did try to monitor the situation for us, but were unsuccessful. I don't know what else I can say about that point.
This is unfortunately one of those situations that sounds completely batshit, but is really quite true. It has been happening for over a year. I appreciate the input so far but please, if you would like to answer, please do so with the assumption that what I am saying is true and that I am not wearing, nor do I own, a tinfoil hat. Are you sure you don't have carbon monoxide poisoning? Maybe you have a leak somewhere and that's what's causing your symptoms.
Says Wikipedia, 'Chronic exposure to relatively low levels of carbon monoxide may cause persistent headaches, lightheadedness, depression, confusion, memory loss, nausea and vomiting.
Before we all start tossing around speculation about exactly who the crazy person might be in this scenario, and how unlikely this is to be really happening, it would pay to know that high frequency irritant devices are commercially available.
If the neighbor is using one of those, you will need a microphone good to 17kHz. And Audacity probably is indeed the right software tool to couple it with. It never happens when the neighbor is gone for an extended period of time. It never happens when he is even just gone for the day when his car is gone. I could go on and on. Have you seen any of the equipment your neighbor is using? We haven't actually seen the device but I've kind of assumed its something like this. Well, my suggestion still stands.
He could be using something that is leaking Carbon Monoxide, and if he's not home, that device or appliance probably isn't on. I don't mean to diminish your belief that he's using a high frequency device I certainly understand, having sensitive hearing myself , but since you asked for advice re: getting authorities on your side, you need to consider other possibilities, and I really think it would be worth your while to have someone come and test for CO levels in your house and around the area that you feel the symptoms are the most extreme.
It sounds like it could be any number of things beyond one of those mosquito device things. Why not talk to him? At least try to find out if he's doing it intentionally, and if so, why. He may well have no idea that it bothers you since you haven't, you know, told him it bothers you. If you've got the funds to pay an electrical engineer or environmental noise technician to come out with an oscilloscope and microphone, a written statement from them will help with the police.
Otherwise, expect the police to continue to be polite but non-helpful. Using audacity on a laptop to verify that it's a 10 KHz to 20 KHz sound will make it much easier to get an electrical engineer or environmental noise technician to come to your house. We are not exactly on speaking terms. He has a long history of animosity towards us prior to this sound thing starting.
Soon after he moved in next door we showed him around the place a bit. Later on we had a very minor dispute and he called the city and managed to get them to send inspectors because of some alleged minor code violation the dispute was completely unrelated to the code violations, it was just something he knew about our property that he could exploit.
We did knock on their door once and casually asked if they were hearing any high pitched noises or feeling anything strange; they said no as a reminder, everyone else in the neighborhood who has come to our house has said that yes, they do hear and feel something strange. I'll mention again that the whole neighborhood is more or less 'on our side' about this. The neighbor frequently aggressively asserts to others that the street parking outside his house belongs only to him obviously not true , and he does all kinds of other strange petty things to everyone.
We have every indication to believe he is doing this intentionally as part of a long-standing grudge. Sometimes it will turn on when we're out working in the yard not all the time, so its not motion-activated. It can be felt in our front yard closer to his property, which I assume is open enough completely open that it would take huge concentrations of gas to achieve that kind of effect.
Its also very unlikely that its caused by some normal electronic device he uses that just happens to produce this sound as a by-product. Its just too powerful an effect to be an old television or something. Thanks for the suggestions about Audacity and the various hardware suggestions, I'll be looking into them. I'm turning in for the night but I'll be checking in with this thread tomorrow. Seems like a cinder block wall along your presumably adjoining property line would solve any such issues, provided of course there really is such an thing.
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