Maybe you’re feeling the building’s HVAC in operation.
If it is a vibration of any kind then it should be amenable to detection. Before wondering what it is you need to be sure that there is something there in the first place.
Nope, no hum for me. All the voices in my head know the words…
Joint Base McGuire.
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I thought the military wasn’t allowed to do that over the USA.
“The price of freedom is eternal vigilance, and broken windows.”
Of course they are.
This isn’t a Transformers movie you know. The effects of a sonic boom only reach so far before they dissipate into the atmosphere. If a plane takes off from JFK Airport, every window on Long Island is not going to be shattered. I know this from first-hand experience.
My ex-wife used to teach on the South Shore of Long Island. She taught in the private school called Woodmere Academy.
When I was helping her move her stuff in the week before school started, there was suddenly a violent explosion. The windows and walls shook and the sound was horrible.
We ran down the stairs and outside in a blind panic. We were pretty much the only people outside. Come to find out that the supersonic transport plane known as the Concorde took off from JFK every morning heading for France.
Plain and simple.
The sound barrier was broken once a day, always within a few minutes. And it occurred over a densely populated portion of Southern Long Island.
It is perfectly legal to do so. In fact until they stopped running the Concorde, it was legal for civilian aircraft to do it as well as military.
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The Helicotrema
As someone who can hear low frequency sounds most people can’t I’ve surfed the Net for info. There is a surprising lack of knowledge of how the ear and brain process low frequency sound. One scientific article I came across claimed that low intensity, low frequency sounds that very few people can hear vibrate neurons in the brain resulting in conscious activity that depends upon the person’s state of mind whilst exposed to it.
Civilian aircraft cannot fly trans sonic. Civilian aircraft cannot fly that fast, save for the Concorde and SST, which are no longer around, they were not permitted to make a sonic boom in the USA. The Concorde landed at the Little Rock Airport, and flew a circle around the city so people could see it, but there were no sonic booms.
Well not anymore anyway. Heck, when I was younger you could fly supersonic across the Atlantic. Men walked on the moon too. I know, no one believes me.
The Effect of the Helicotrema on Low-Frequency Cochlear Mechanics and Hearing
http://aip.scitation.org/doi/pdf/10.1063/1.3658137
Many older people have difficulty following what people are saying when in an environment where there is a lot of low frequency sound because, for them, the volume of these sounds (emitted by some vehicle engines, for instance) is drowning out the other person’s speech. Studies have shown that the average 60 year old has better hearing for low frequency sounds than the average 18 year old.
We should not lose sight of the fact that what jennshark originally said was that [whether or not planes producing sonic booms were extant or permitted], her nearby airport was too tiny for such planes to use, and thus what she hears couldn’t be that.
SeniorCitizen007: Helicotroma! That is fascinating. I, too, have researched quite a lot, but never run across that bit. I will say this, however: I have pretty good hearing. I can hear a rheostat light switch when it is on. The other night, when it was really quiet, I heard the light bulb in my desk lamp whining. (guess it’s getting ready to go out?) When this vibration thing is going, it doesn’t obscure other sounds, it’s just hell of distracting.
Novelty Bobble: Well, yeah; hence the experiment with the oscilloscope. I am somewhat impeded by the fact that I can’t quite determine if I am dealing with regular sound waves (unlikely), ELF radiation-type waves, or something more exotic. If anyone has advice about that, I’d love to hear it. There’s one guy that proposes an experiment involving a Faraday cage, but that’s a little beyond my capability I think.
Wendell Wagner: I don’t know how to make it any clearer to you. I hear the hum in a private home in Albany. I hear it in a private home in Berkeley. I hear it in a duplex in Oakland.
I DO NOT hear it when riding my bike or the bus travelling between those three places.
I do not hear it when riding in cars.
I do not hear it when I go outside to get the mail.
In fact, I don’t hear it right now.
But I heard it earlier today, and also last night, and part of every day for weeks now. This sound can be reduced, but not eliminated, by earplugs of a rigid nature. I fail to see what blindfolding me and driving me around would be supposed to mean, test, or prove.
It’s a blinded experiment. It’s common for medical research. Before a pill is judged to be effective for a given disease, a group of people suffering from that disease is split randomly into two groups. The people in one of the groups is given the pill being tested, while those in the other group are given a placebo pill (which looks and tastes like the pill being tested although it has no effect on people). The people in the experiment don’t know whether they are getting the pill being tested or a placebo pills. The nurses handing them the pill don’t know which one they are getting either. Only the people running the experiment who sent out to everyone in the experiment know which one they got. It’s necessary to do this because people who know which ones they got frequently have unconscious biases which mean that they respond better to the pill being tested than to placebo pills. You know where you are at any time if you’re not being blindfolded.
You may be unconsciously responding to your knowledge of where you are. Everybody has unconscious assumptions. Read Thinking, Fast and Slow by Daniel Kahneman if you’d like to learn more about unconscious assumptions:
Wendell Wagner: Ha ha, that’s the first time I ever saw someone insist that a double-blind experiment be literally blind!
But I’m not sure what you’re getting at. Are you suggesting somehow that this physical sensation is all in my head? A phtsical sensation that I experience in three different locations, but only sporadically? One that three of my friends have also experienced, one of them in two of these locations?
And if I were blindfolded and taken (to a building) in a faraway location and did not hear the vibration, are you saying that would somehow prove that this sensation is imaginary? Why? Why not simply proving that it is associated with a given general locale, as these hums usually are? If I did hear it, you would say that proves that it’s all in my head. There’s the first and biggest flaw in your logic right there.
You see, I am experiencing a genuine, physical sensation related to but perhaps not, strictly speaking, a sound. I have no earthly reason to start from a premise that I am imagining it; or mistaking an entirely different symptom of a condition I don’t have (tinnitus) for a sensation that is described dramatically differently from that symptom by myself and many others.
With all due respect, I don’t care in the slightest if your first assumption is that I must be mistaken. Honestly, why would you start out with that assumption anyway? I hope you don’t make a habit of it, you won’t learn much that way.
I don’t have time for that. Far more productive is a clear-headed, rational and systematic approach at applying logic and the right detection apparatus to figuring out exactly what it is. I know that this phenomenon is external to myself, and I am 75% sure it is a man-made occurrence. I mean to find out what it is.
We’ve got the Seneca guns. I’ve never heard the Seneca ones, but I have heard the Cayuga Lake ones.
[QUOTE=brujaja;20741728Are you suggesting somehow that this physical sensation is all in my head? A phtsical sensation that I experience in three different locations, but only sporadically? One that three of my friends have also experienced, one of them in two of these locations?[/QUOTE]
To be fair, he wouldn’t be the first to draw that conclusion:
Especially since testing in Taos found no external source:
Scientifically speaking, Wendell’s view is as valid as any.
Have you noticed any change today? I’ll explain after you answer.
Oh god. Cannot find the cite on.my phone. Will provide cite that the Concorde did in fact break the sound barrier on a regular basis hen departing J.F.K.
Meanwhile, mind providing cite to back up your claim?
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That civilian airliners can’t break the sound barrier? Not from laws, but from physics.
I’ll see what cites I can find about the military.
First hit. “In reality, the world’s most successful supersonic passenger jet simply wasn’t all that successful. For one, it was restricted from flying at supersonic speeds over the United States and parts of Europe because it produced noisy sonic booms.”
I bet the Concorde made a sonic boom as it let land and accelerated over the Atlantic.
It made no sonic booms when it flew to Little Rock airport. I don’t recall what it was doing here.
It seems that there are certain corridors over low populated areas where the military does let aircraft exceed the speed of sound.