Is anyone hearing the global hum right now

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What you heard was man made. I believe that. I am not sure that what I am hearing is man made.

very interesting

Whoa...whoa..whoa….

You hear a "hum" too?
And...

You were able to hear BATS?

I see them fluttering around in the summer twilight, along with the flycatcher birds. And I have probably heard a chirp or two (and wondered if it was a bird or some lower range vocalization from a bat). But I don't routinely hear bats. But you used to hear them a lot? And they were "loud" to you? If that's true (that its bats that you were hearing and not something else) then you used to have a strange range of hearing for a human, and must have been able to hear into higher than the normal 20 thousand hertz. Can you hear dog whistles?

As you get older you hearing starts to go, and you stop hearing the upper range. So it makes sense that as you got middle aged that you might loose your ability to hear bats...if you actually had had that talent.

Im not calling you a liar. I am just amazed.

Yeah. I was wondering if you werent hearing rocks under stress in the crust beneath you. If I am not mistaken I think that you said that you live in western Pennsylvania (were the mountains are). Maybe you all are about to get a local earthquake there. Keep us posted. We don't have as much seismic activity as they have in California, but we here in the east, near the Appalachians, do get some seismic activity. There was a major-minor quake in Virginia a few years ago that we all felt here in the Washington suburbs- enough to scare me and all of my neighbors out on to the street.

The Taos Hum?

https://en.wikipedia.org/wiki/The_Hum

I can currently hear a hum which sounds like what people describe as the global hum. I find it comes and goes. It had been absent for a few weeks until yesterday when it started again. I've been hearing it on and off for some time. I just assumed it was a low pitched form of tinnitus since I have experienced tinnitus intermittently throughout my whole life, albeit mostly high pitched.

On one hand: you live in "NW England" which is near Wales, where MountainGoat lives. So you two maybe hearing the same (more or less) local phenom.

On the other hand: you do have intermitted tinnitus . So someone could say "your honor, we can't trust this witness!" .

and another hand, fwiw

when i go to a certain place thats a bit in a lower valley and nothing could possibly make noise,
its noisy as hell, somehow the traffic and other sounds seem to return and hang around here
and these ever****** airplanes ***noisepollution
the year of the iceland catastrophe with all airtraffic down,
there was this great and calming silence that wasn't heard for years
that was so nice

We had a similar eerie silent vacant skies here in the states...that was right after 9-11. But I digress.

So you're saying that sound collects in the bottom of valley where you live?

Sound travels faster and farther through rock than through air. So if you're in a valley I suppose that its possible that the rock strata in the valley walls that surrounding you are transmitting traffic noise, and doing so from farther away than you would get from standing on a level plain and hearing only sound transmitted through the air.

When I hear/feel the low-pitched vibrations, I also suspect the source may be some underground micro-collapses.
My city is on quicksands, they really move - not like in the movies but new buildings cracking a few years after construction happen all the time, both my past workplaces did.
And they are currently building a tunnel just a few km from here.

The hum is really hard to bear sometimes, my husband hears it too - his hearing is extremely sensitive - but I don't expect any extraordinary source of it with so many possible ordinary sources available.

Those high pitched dog whistles? Of course. Can't anyone else hear them? I know to hear bats I used to adjust my hearing to hear them. Those dog whistles these days now my hearing range has become limited is about the limit now as I fluctuate between hearing them and not hearing them if that makes sense.
As a child I was often needing to keep my hands on my ears due to noise. Why school was difficult if we were kept in the hall at lunchtime when all those kirds were shouting and screaming. I used to be in tears in a corner with my hands over my ears the whole time. They would not let me leave the room.
Another thing I hated passing and had to run for it onthe other side of the stret were jack hammers. They have been made much quieter these days which is amazing and brilliant.
Loud noises makes my hearing vibrate which is painful.
When I was 7 years old, I woke up with blood all over my bed. Perforated eardrum due to the cold. As a child I was often in pain with ear ache at night due to the cold in the bedroom when the frost made those patterns on the window. Dr sent me to hospital. They wanted me to stay in overnight. No way did I want to be without my parents. This was the 1970's. They didn't have any beds. An A&E doctor poured in one and a half bottles of ear drops into my ear and blocked it off with cotton wool and that was that.
in my teenage years I had loads of issues with glue ear. I still had the hearing range. This lasted on and off until I was 28 years old and I was concerned as I was getting a railway job. I actually passed the medical with glue ear in the one ear and they could tell that I had perforated the other ear as a child. The other ear passed but only just, and the glue eared ear passed with flying colours even though to me I could not hear much from it! I prayed and other Christians prayed and the glue ear issue just dissapeared! The hearing test showed I had a large hearing range.
They had previously tested me for colour blindness on the tail end of the job interview and that was interesting.
I was shown this book with mages of dots. I was to look for numbers or letters. I started from the start of the book and I found that for the first half of the book, I had to distort my eyesight to see them. I got half way through and the man was about to stop me and I ansered the one on the page opposite before he could. He then looked puzzled and said to carry on so I did. I fould that the second half of the book was easier as I didn't need to distort my eyesight to see them. This was good as I was starting to get eye strain! Anyway. I worked my way through to the end.
The guy said that I had answered the whole book. I said "Yes. Am I meant to?" He said "I don't know if I should pass you or fail you!" He said that the first half of the book only colour blind people are meant to see and the second half of the book only non colour blind people can see. And he said how he was going to stop me to fail me and I answered the next page which puzzled him so he let me carry on. He said he had been assessing people for 30 years and no one has ever answered every page in the book correctly! He asked me how I did it! I said "I don't know!"
He had to think and he said "I have to pass you because you have answered every page of the non colour blind part of the book correctly" (I answered every page in the book correctly).
Is funny the things one remebers. Every 5 years we had to have a medical while young and if we passed 60 we would have to have one every 2 years. One man slightly younger then I am who went into train driving had a medical which was on the fifth floor of a building of a city that took a fair few hours travelling on the train for us to get to... Well. He just passed his medical, went to go out of the room to reach the stairs. The cleaning lady had the vacuum cleaner at the top of the stairs. He didn't see it and fell down the stairs and broke his leg! He was off work for a while. He passed ad failed his medical on the same day! Haha!

Could it be aeroplanes?

https://www.flightradar24.com/48.48,4.16/5

Wow.

MG...you are a unique individual.

That's a great story about the eye test.
How you both flunked it .and passed it at the same time.

We have all seen some samples of those kinda tests in books, magazines, or online. Look at the dots - if you see such and such number then something is right with your vision, or...if you see it something is wrong with your vision.

There might an autistic component.Maybe you took the task too seriously and stared SO long and hard at the pics meant for the colorblind that you actually ferreted out the hidden numbers despite being a normal color sighted person. A NT might have just looked at it briefly and quickly admitted to not seeing anything. It doesn't seem likely that you have an ability to switch between color blind and color sighted. More likely that it was autistic doggedness. Lol! But who knows?

But back to hearing.

Humans normally can hear between 20 hertz and 20,000 hertz (20 kilohertz) in childhood. But it tends to drop in middle age down to like 15 kilohertz. I took a college course in sound engineering a few years ago, and the professor played tones at different frequencies. And true to form the younger college aged students raised their hands to report being able to hear it a like 17 or 18khz (one or two even higher).But I had to wait until he got down to 15 before I could hear it.

But... you were (and to some extant still can) hear dog whistles???

You ARE aware, I hope, that humans aren't supposed to be able to hear dog whistles? That's the whole point of why they were invended, so dogs and cats can hear them but so humans cant.

Wiki says dog whistles range from 23khz to 54khz.

So even the lowest range is higher than humans (even children) are supposed to be able to hear. So at middle age if your still able to hear even 23, even if you have to strain, that would be amazing.

And bats????

Wiki says bats make most of their sounds between "two and three times the frequency range of human hearing". So that would be like 30khz to 60khz. Bats make sounds that sound like bird chirps when slowed down. And do so as a form of sonar to navigate, and find prey, at night.

Again, if you were able, or are still able, to hear into that range then that's amazing.

Its too bad that your family, or family doctor, didn't recognize that ability when you were a child. I wish that they could have given you a test (like the one our teacher gave) with tones to see how high your hearing could go when your ears were young. You might have made it into the Guiness Book of World Records for remarkable hearing. They also might have been able to deal with your sensory issues better if they had known how weirdly broad ranged your hearing was.

I am curious as to how high pitched a tone you would be able to hear, even now, but I would be more fascinated to know how high you could originally hear as a child. Like maybe 30khz.

https://en.wikipedia.org/wiki/Tetrachromacy#Humans
You may have both normal and altered photopigments. They seem typically ignored by the brain but it seems you have access to all of them.

I do live very close to a fault line. I might actually be on the edge of it. I live in a different part of PA but I know there is a fault line here. I remember the VA earthquake. We felt it here. I was on the phone with my mom upstairs in my bedroom when the wave came through the house. Fortunately there was no damage to our houses. I actually felt it right before my mom did and she lives closer to VA than I do, just south of me.

You and I might be hearing the same thing. I have been hearing it for a few days now.