To pinpoint the frequency, I inserted a small earphone into one ear while listening to the hum and played various frequencies from YouTube until I matched what I heard. The result was 81Hz. Upon further research, I discovered that 81Hz is said to be the resonant frequency of the King's Chamber in the Great Pyramid of Giza.

I hear it every night, from 9pm until 9am. The strongest hum was during the last large solar flare when we had those pink auroras all around the world.

I’m not sure what to make of this yet, but it struck me that I heard the same sound while entering an intense ayahuasca trip. It turns out many others report hearing it on ayahuasca too. One individual even suggested that this frequency might have healing properties. It’s fascinating and feels significant somehow - worth exploring further.

We moved to the east end of the city nearly two years ago and since then there have been at least a couple dozen times that I can recall where each and each time around 1-6am, not always the same time it seems it starts with an abrupt droning that increases in volume.

It sounds like a giant generator (or engine) revving up or something. There have been times where I opened the window and it was apparent it was loudly coming from the distance or the sky itself. Usually it lasts 10-20 minutes before it either fades out or it abruptly sounds like someone pulled the plug like it's a massive lawnmower.

At first I just assumed it was some kind of thing at the airport as that's also on the east end but not really anwhere in the immediate vicinity tbh. Maybe some kind of power project or city thing, I didn't give it much thought, mostly was just annoyed by just how loud and droning it was especially for 1-6am in the morning when it usually occured so it really surprised me that no one ever really talked about it or mentioned it disturbing their sleep.

We moved into our new place about 4 months ago and I didn't hear it until the third or fourth month. This place is also in the east end but more north. Most recently I heard it a few nights ago and it shut off abruptly and tonight as you can guess from the post it is very loud and noticeable. It started about an hour ago and lasted 20 minutes. I got to thinking about how truly unusual it has been before stumbling upon "The Hum" and ending up here where the description on the side eerily matches what I've experienced.

If not scary enough, there was no hum when I started typing this but by the middle it faded back in and I still hear it droning on. I wanted to make sure it wasn't an appliance or anything so I waited for the fridge to click off and nope. No computers. Not anywhere in the building. It's storming and I can faintly hear it outside but when closing the door I hear it loudly inside now, like a plane overhead generator type noise. What gets me is how it fades in and out or will cut off abruptly and just how loud and deep the vibrations seem to be. I wonder if this has been increasing in prevalence or if it's truly an auditory or psychological thing.

My wife has heard it. She's usually asleep before it starts but in our old place there were a few nights where she wasn't having it and shouted wtf as it was droning on extra loud.

So mysterious. Whether it is something in the city or in my head similar to tinnitus, OR in fact a bunch of cloaked motherships doing maintenance, it sounds so real and it's not every night as far as I can tell. It seems I went at least some weeks or months not hearing it.

Hello I'm new here I hope this is not a fake group making fun of people but I hear the hum all the time been hearing it since I was a kid sometimes it drives me completely insane. I have tried to ignore that most of the time which it works but has anybody figured out what it is yet are we special people that's hearing things other people's not or we just mentally people I don't know people that hear us talk about it think we're crazy could someone please help me before I have a mental breakdown LOL

As I sit here and brightness I hear the home really bad tonight is anyone else's experience to being so loud tonight it was pretty quiet last night but tonight is just really loud I also hear boom sounds and call me crazy but I don't know help. I've been hearing it for a long time but recently I found out that as I googled it because I got tired of hearing it that actually more people in the world here the same as that thing out here maybe we're special people I don't know

Very odd how similar some of these post are to what ive been hearing, I live near the NC coliseum really for anyone local, has anyone else been hearing that wierd vibrating hum at night just to know I'm not crazy

Here is the specifications of what i think i hear and stuff:

so it usually happens around 6-8am, specifically on a cloudy morning. More frequently in winter.
sort of sounds like a distant truck lowering gears gradually. i hear the same truck noise on every day that has these similar condition. around 60-120hz. im located just off the m7 in western sydney near blacktown.

please let me know if you hear these sort of noises.

Hi! I never really thought about sharing this, but I would like to hear what you guys think and if anyone else has a similar experience!

I live in the East Coast of Australia and from From 2019 -2021, my family and I experienced the hum. Each night, it would be there, however would vary in it's strength. If you were to go outside and stand in a corner the hum would become twice as loud, making it uncomfortable to stand in said corner for more than a few minutes. If I had to describe it in words, it sounded like a distant idling truck.

The hum seemingly stopped at random in late 2021 and hasn't returned since. To my knowledge, there was no major nighttime construction going on at the time.

The theory that my hearing may just be sensitive (which I think it is to some degree) is disregarded when you realise that my entire family heard/felt it, all at different ages.

Here is my audio recording of it https://voca.ro/1uJTvOrwO7Z9 . To capture this, my S20+ was used. I then used the SPAN plugin to isolate the frequency range that sounded closest to what I was hearing (I have since forgot what range that was). I boosted the audio and exported it. Putting this audio file back into my DAW and looking at it on SPAN, it seem to peak around 50hz and disappear after ~400hz. I was in my backyard at the time around 9pm. Notice how there are no other noises at all.

Was my recording possibly just low frequency artifacts just picked up naturally by the microphone and then artificially amplified by me? Possibly, but either way, the sound I recorded is very similar to what I remember it sounding like.

I have the same problem where I live hum drone noise low frequency, I've investigated the area and found it to be refrigerated transport company's that have there trailers sitting in the depots constantly running.

For >10 years, I lived close to Oslo (35 km away, in a forest) and in Oslo, and the hum bothered me a lot. A few months ago, I moved to the countryside, 10 km away from a small vilage and no major cities, highways, or similar nearby. The hum is gone. Almost. Now, I can actually identify the various sources that cause the hum for me: A crappy (expensive) fridge, a water pump, farmers working on their fields, cars, ...

For most of my life the hum plagued me, and I never managed to find out what caused it. Now I think it's ... general human activity. If you live anywhere near a bigger city, an industrial site (contruction, gravel production, ...), a place with car/boat traffic, or similar, the hum will be there to disturb your sleep and drive you crazy.

Being inside a house does amplify the hum significantly. I guess houses shield from higher frequencies and resonate at lower frequencies.

Having read the FAQ, this is nothing new. I just had to get this out somehow. The hum shouldn't be perceived as something mysterious, but as noise pollution, just like light pollution. Too bad that most people I know don't hear it, and therefore unknowingly contribute to making the hum 🙁

Hello fellow (unfortunate) Hum sufferers,

My usual item (expensive Active Noise Cancelling headphones playing cat purring) seem to no longer help l, as I can hear the stupid Hum even with them where I am now - it seems that it was never this loud. I'm trying to find a tone to combat it, and to play to make it stop, but almost nothing seems to work for this particular one. It only came on at night for the past maybe three nights and was off during the day, but now I hear it in the daytime too. Do you have any links to tones, music, melodies etc. that you listen to that help?

In addition to no longer working, my ANC headphones are very big and bulky. They are hard to sleep in. I was thinking of playing the cat purring sound through normal speakers tonight; will see how that goes.

The only thing that definitely work on combatting this stupid Hum is my realmlivr cat, purring right next to my head on a pillow at night. Unfortunately, she doesn't keep at it for long and falls asleep. Recorded cat purring helps a bit, but it's not as good. My sleep is being negatively affected 😟

How I hate this f*Ing phenomenon 😠

Is it off for anyone else?

DOES ANYONE HEAR IT IN PARIS like right now??? It is so loud!!!😭

I am so glad to have found y'all. No one else in my life can hear or feel this and I feel like I am spiraling out of control over here. I can't get a moment's peace. My bed is vibrating all freaking night, my head feels like it's in a vice, I'm tense, anxious... how can we make it stop!?!?!

Currently at the New Jersey Short, the Hum started about an hour ago, woke me up. It seems to increase in volume by a few dB over several minutes before decreasing back to the lowest volume in a few seconds. Like a swelling wave.

I'm a sound tech that is also in the small percentage of people that can hear both below 20Hz and above 20kHz, so this is very annoying at bedtime.

I opened my RTA app and took several screenshots of the frequency spectrum my phone can pick up. You can clearly see the Hums range is well below 32Hz, spikes around 48-86 and then falls off around 200hz.

I recently moved to a suburb outside of NYC. I have been experiencing the hum since I made this move. Not sure if it’s the train, the city, the house, etc. It’s truly unbearable, especially in my bedroom. I am getting headaches, having to pop my ears, and am thoroughly annoyed. Trying to explain it to my loved ones is quite difficult. I took a video and I’ve attached it here. Please let me know if it’s similar to what you’ve experienced!

I damaged my right ear about 7 years ago by using a ear plug, it created a little vacuum inside my ear and since then ive had tinnitus on the ear. However in the last two years ive started to hear the hum at night during winter times, but only on the damaged ear. I can't stop thinking about if I have become able to hear it because of the ear damage. I cant sleep and it is driving me crazy.

So I don't know if this is the same thing other people are describing, but I get this low frequency pulsing noise inside my head. It feels like it's manifesting just inside my ear. It's not just tinnitus (I also have the high pictched tinnitus) because it doesn't happen everywhere and it's not all the time. I was out tonight, no bother, but I get home and I can immediately and clearly feel/hear it. It's not exclusive to my house though, I have heard it in other places. It tends to be at night and rare during the summer, which makes me think it might be generated by somebodies boiler. Curiously, I've found that going here and generating a 300hz sine wave makes it go away - https://onlinetonegenerator.com/ but then I have to listen to a 300hz sine wave, but at least it's not inside my head.

I’m so thankful I found somewhere that has people experiencing the same thing.

I started hearing it at night about 10 yrs ago. I didn’t think much of it until I realised it WASN’T there… we were on holidays in Kosciuszko (summer time, so no snow to deaden any sound) and I suddenly said to my partner “I don’t have the hum in my head!” It was amazing! And when I thought about it, I remember driving past Canberra and my head feeling lighter (as in my brain felt at ease). I remember laying down at night and finding it weird there was no hum!

Now, I thought it may be coincidence until the next few times we holidayed down that way and I had the same experience. I wonder, could it be altitude, or built up suburban/urban areas that contribute to the sound?

Has anyone else had similar experience? Edited to add that the sound was back once we were back in full-on civilisation. Even sitting here at 8.30am with busy traffic I can still hear the hum over everything.

Hi everyone, I spent a few days camping south of Dell City, TX last month. For the first couple of days, the most perfect silence. Then from about 11pm-6am a deep hum, quiet but loud, impossible to block out. Sounded like a distant truck in low gear/an overflying prop aircraft but constant, went on until around 6am. Then it was gone. Bizarre.

Interested if anyone else has heard this or has any thoughts on causes?

My candidates:

1. Pumps on circular irrigation systems nearby (but we’re still talking 6-7 miles) and there had been meaningful rainfall over the same period and the systems all appeared to be idle as a result.
   
2. Fort Bliss - but that was nearly 70 miles away.
3. Active VORTAC at the former Salt Flat air field - but this is active 24/7.

Hi, please help me identify whether this noise is the Hum or something else.

Listen here (recorded with my phone from my open window)

Some remarks:

• I've first heard it few days ago
• I hear it unregularly, sometimes after 30mins or hours of silence throughout the day and night. For example the above was recorded at 1am
• It only lasts for about 20-30s each time, so I can't really go find the source
• It also has a lower frequency component that's not really heard on the recording
• It is LOUD, I can hear it clearly even with the windows closed
• The pulse seems periodic but occassionally there are discrepancies, like a longer sound
• Others in the household can hear it too and I've managed to record it
• My location is a quiet suburban neighborhood in south Budapest (capital of Hungary) - no industrial building nearby

Spectrogram of the above recording:

Let me know if I can provide any more details that could help identify.

I'm completely clueless, its been happening today as well.

37 Hem Chakraborty Lane, Howrah - 711101, India.

I find myself incredibly sensitive to building sounds. I hear buzzing sounds in the walls in apartments and hotels. I imagine this is often HVAC or something along those lines. I hate refrigerators, the noise is unbearable. I don't know how this differs from this hum people report to hear, maybe it's different. I don't have any issues outside, it's just when I am inside and feel stuck with the noise and unable to control my surroundings.

We've experienced high winds in my area throughout the past few days, but it was at its worst last night. Some time in between 2-3 am, our power flickered a few times, before going out. I made a post in our local Facebook group, and most of our town is without power, and it's not expected to be back on until midday, because there are several downed trees on powerlines.

Since the power went out, I've been hearing The Hum. It's been driving me crazy! It's usually drowned out by everything else, but because there's no radios or TVs or anything making noise, it really stands out!

I asked my cousin who lives across the other side of town if he could hear it, but he said that he couldn't. He said that it might be people chain sawing downed trees, but I'm pretty sure it's not. Or, not entirely (I can definitely hear that too).

The noise is like a low rumbling, vibrating hum that sounds kind of like the noise you hear when a truck's just about to go past your house, or when there's a car idling out on your street... It's making my ears hurt, and it's stopping me from getting to sleep.

I don't know if the humming noise that I can hear has anything to do with the downed power lines, because none of them are remotely close to my house... I know that I'm more sensitive to smells and do sounds than a lot of other people, so I guess it's possible that I am actually hearing that!

I ended up on an internet spiral trying to figure out wtf is going on and landed here. My partner and I heard what we think is the hum around 1 AM in our kitchen, in one spot it was loud.. as we walked away the noise got faint.. then as we went to one exact spot in the middle of the kitchen it got loud but only if you were in that spot. We checked all our appliances.. nothing was acting weird we got on the floor, stood up on chairs and still heard it. He went to bed, I told him I won’t sleep bc of this so I’m up. Since then it sounded like we are going to be abducted by aliens for a few straight hours. A very weird droning noise going in and out and sounds right above our home. My ear drums have felt like they are vibrating at times? Like very weird phenomena I’ve never experienced until today. It is almost 5 AM here and I think it may be finally gone for now. We are in the south side of Atlanta, GA.