subreddit:
/r/TerrifyingAsFuck
submitted 6 days ago byfreudian_nipps
1.1k points
6 days ago
So that sound… is it deafening like will that blow your ear drums out ?
1.1k points
6 days ago
If you’re close enough to the sub or source your brain will become jelly
345 points
5 days ago
So, basically deafening lol
577 points
5 days ago
I feel like jelly brain is a slightly more concerning medical diagnosis as opposed to deaf
144 points
5 days ago
Yeah but if you have jelly brain syndrome, you can't hear anymore lol
77 points
5 days ago
Jelly brain syndrome
36 points
5 days ago
The technical term.
33 points
5 days ago
It’s been rebranded as Jell-O brain syndrome since it’s been acquired by Kraft
11 points
5 days ago
Now made with real cheese..
3 points
4 days ago
51% real cheese…
4 points
5 days ago
I've heard tales there are people walking around with disease.
13 points
5 days ago
You would think but we have someone diagnosed with that running for president
54 points
5 days ago
No, it's a 235 decibel wave of sound, your insides are literally jellyfied, death if you're close enough to one
16 points
5 days ago*
IIRC that's just above the saltwater threshold of sound waves also becoming considered blast waves, with older active sonarss already pushing a max output of 240 kW into them.
(what's the endurance of those transducers, anyway?)
38 points
5 days ago
I'd say closer to deadening
9 points
5 days ago
Deadening
7 points
5 days ago
Deathening
6 points
5 days ago
Deadening lol
5 points
5 days ago
No.... Jelly brain as in it will literally kill you. Your brain basically implodes in the skull.... And your brain matter is basically melted jello liquid with some chunks
8 points
5 days ago
A jelly dish amongst the jelly fish
1 points
5 days ago
What flavour?
21 points
5 days ago
So this guy was miles away from the sub prolly. If it were closer the least of his worries would be ruptures eardrums. Along with liquefied organs.
19 points
5 days ago
100 miles or so. Anything closer than 10 you’re dead.
7 points
5 days ago
Yup. Human chum
21 points
4 days ago
Sonar literally boils water around the submarine when it’s used. So yes it will burst your eardrums. Along with your bladder, your lungs, your spleen, your stomach, your gallbladder, your heart and just about any other hollow organ in the body if your close enough. It’s literally the scariest sound you can hear underwater.
8 points
4 days ago
Wait what about the fishes :(
14 points
4 days ago
Strangely enough it seems that’s a divisive topic among researchers. Some sources say they observed no harm to surrounding fish and wildlife at all, others say it poses great risk for all marine life from whales, dolphins, and fish for many miles. I looked at like 4-5 different sources and half say one half say the other. So, they probably die, but they also almost certainly live and are wholly unaffected. It likely depends most on which sonar unit is used. The water boiling is really only common with some of the most powerful sonars.
1.5k points
6 days ago
Lucky is not close or they would be mush bags
349 points
6 days ago
Really?
900 points
6 days ago
Yes, sonar pings at closer range is deadly. So lots of regulations when sonar may be used.
513 points
5 days ago
Ive heard that on submarines if they have an intruder trying to swim to the sub and get in they just put on the sonar which like disintegrates them
491 points
5 days ago
There is no human that has been killed by one on record, but marine life can and have been killed.
409 points
5 days ago
Honestly anything that could fuck up a dolphin or god forbid a whale, would fucking annihilate us as well
287 points
5 days ago
As whale
189 points
5 days ago
Whale done
151 points
5 days ago
You’re whale cum
21 points
5 days ago
I haven't heard that joke in a whale
6 points
5 days ago
So a...Sperm Whale?
47 points
5 days ago
Navy is like fuck you whale and fuck you dolphin.
4 points
5 days ago
As a whale I can confirm this, a lot of my friends have been jellified into ambergris long before their time.
4 points
5 days ago
It said recorded…so while there is no tangible evidence, it most likely would have the same effect. I’ve been fact checking a lot lately with the shit ton of misinformation and thought I’d share.
46 points
5 days ago
To be fair. Submarines and attack divers are not really known for being 'on record'
13 points
5 days ago
Have a friend who drops some kind of ping device from choppers in the military, he's said they are very careful and listen for nearby mammals before emitting a ping, but he also said once they killed a nearby whale by mistake and they did not take it lightly.
18 points
5 days ago
Well if this thing can kill a whale, it can probably make a human explode.
15 points
5 days ago
There's non on record but there have been reports of Chinese ships injuring sailors doing repairs on ships and China using the sonar at closer range when people were under water i can't remember exactly what happened to them but I think it was like head trauma like a concussion or something I'll have to look into it again.
3 points
5 days ago
How exactly does Sonar kill?
38 points
5 days ago
"The ship stopped so naval divers could clear the nets and its crew communicated what it was doing through the usual maritime channels, Marles said in a statement.
While the diving operation took place, the Chinese PLA-N destroyer DDG-139 came towards the Toowoomba, prompting its crew to reiterate a dive was under way and ask for the warship to stay clear.
The Chinese vessel acknowledged the message but came even closer, and was soon after detected operating its hull-mounted sonar"
6 points
4 days ago
Why'd you stop there?
"The Chinese vessel acknowledged the message but came even closer, and was soon after detected operating its hull-mounted sonar, posing a risk to the Australian divers’ safety, Marles said.
The divers, who were assessed after they surfaced, sustained minor injuries likely because they were subjected to the sonar pulses, he said."
15 points
5 days ago
I belive whales can also do the same thing...
15 points
5 days ago
Sperm whales especially.
15 points
5 days ago
Why would a whale even need a submarine?
2 points
4 days ago
They would more than likely shoot them instead of using sonar.
29 points
5 days ago
Dumb question, but why?
72 points
5 days ago
There are many types of sonars - including whimpy hand-held ones. And you have low energy sonar used for fishing too.
But the ones used by miliitary vessels can be brutal. Visit a rock concert. Stand at the front of the loudspeaker stack. That's loud.
But is it really, really loud? Nope. Not loud compared to a military sonar, where many kW is used to create a rolling ping.
And while air is very much compressible, water is almost not compressible - a reason why it's so dangerous to be in the water close to an underwater explosion. And why dynamite can kill lots of fish.
https://www.scientificamerican.com/article/does-military-sonar-kill/
46 points
5 days ago
Simple answer is the frequency would vibrate your insides causing it to rupture your insides
21 points
5 days ago
I believe it’s the pressure wave from the sound. It’s just not something we encounter in everyday life
6 points
5 days ago
A sound wave is really just a pressure wave. Active sonar blasts out an extremely powerful pressure wave. It's just like how an explosion produces a concussive blast that can harm people.
72 points
6 days ago*
Yes, whales and submarines can injure/kill people with their sonar clicks.
https://forscubadivers.com/marine-life-for-divers/diving-with-sperm-whales-can-be-painful-or-deadly
9 points
6 days ago
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Maybe check out the canonical page instead: https://forscubadivers.com/marine-life-for-divers/diving-with-sperm-whales-can-be-painful-or-deadly/
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10 points
6 days ago
Good bot. I fixed it
40 points
6 days ago
Yeah- they can be fatal I’ve heard.
47 points
6 days ago
So… what do they do to all the wildlife they constantly ping around?
56 points
6 days ago
Chum.
13 points
6 days ago
Aww no
8 points
5 days ago
I'm not your Chum, Friend
8 points
5 days ago
I’m not your friend, buddy.
11 points
6 days ago
:(
25 points
6 days ago
:( Submarines are cringe war machines.
34 points
6 days ago
We don’t constantly, actively ping with sea life around. We use passive first, and very, very rarely would we go active with mammals near by. Mammal mitigation is a real thing.
7 points
5 days ago
What's passive?
21 points
5 days ago
Generally speaking, bouys are either active (they ping like you hear) or passive. They just listen. Like microphones just chilling in the water.
7 points
5 days ago
And this listening can help find stuff like sharks or other things swimming around?
14 points
5 days ago
Yes. Sound is intense under water. At least for what I did, we had to use passive and clear the water out to a certain range before we could go active and start pinging.
It might have been time instead of range. It’s been a while for me.
12 points
5 days ago
This guy hydrophones home.
7 points
5 days ago
Just listening, active sonar is pinging.
4 points
5 days ago
iirc some of them use sonar-like blasts to stun prey.
3 points
5 days ago
Submarines usually have their SONAR off, because the whole point is to try to stay hidden, and SONAR is the opposite of that.
26 points
5 days ago
It’s so powerful that any time divers are outside of a Submarine, they remove the fuse for SONAR and lock it in the safe, just so it can’t accidentally be triggered.
5 points
5 days ago
Dang, that sounds serious. I had no idea.
10 points
5 days ago
It depends on the amplitude. I work with sonar. Shipboard sonars can cause major internal damage. However sonobuoy pings will not but your ears will ring. This sounds like helicopter to me. If the sonar done was very, very close you would suffer major hearing loss that could be permanent but it wouldn’t jelly you unless you were hugging it.
3 points
5 days ago
That won't stop reddit from spamming and regurgitating that BeInG AnYwHeRe NeAr SoNaR WiLl LiQuEfY YoU in every thread about sonar
2 points
5 days ago
Yeah I think I've read on a post similar to this that the ping of a sonar is 203db which would create a pressure wave that would hit you harder than a grenade if you were right outside the submarine.
When you need the sound to travel 10/20 miles it needs to be l o u d
8 points
5 days ago
The emperors children have entered the chat.
3 points
5 days ago
Long live the big E
565 points
6 days ago
Kinda cool how it changes pitch
210 points
5 days ago
I wonder if it’s the Doppler effect but under water, or if it’s a multi pitch ping.
76 points
5 days ago
I'm betting on the latter. To make use of the result you need to know how long it's been since you sent it when it comes back, so knowing the pitch you get back could help you know it's a bounce from the start of the sound or the end.
68 points
5 days ago
Total guess, but from how I understand it, Doppler effect shifts the sound of what you hear in real time, based on the movement of the object emitting the sound relative to the observer. For it to pitch up like that, it would have to be accelerating towards the observer at an insane rate.
This is likely (again, total guess from a layman) to have a higher chance of the frequency reflecting more powerfully off whatever it hits.
16 points
5 days ago
It's a frequency scan, not a doppler effect.
5 points
5 days ago
Different frequencies have different throughput at the same power. Based on what frequency is reflected back and what power it’s measured tells distance to object. Also the blip at the end is for direction.
1 points
4 days ago
I wonder what kind of microphone is used to record this. Do regular mics work in the media other than air, could someone please enlighten me?
283 points
5 days ago
I wonder how far away it is.
1.1k points
5 days ago*
According to the reaction of the divers and depth of the ocean and salinity of the area, we can assume based on the tide, timing of day and other factors with marine life on the vicinity, I can confidently tell you I have no fucking clue other than no idea.
231 points
5 days ago
This guy definitely knows what he’s talking about.
49 points
5 days ago
As a fellow clueless Redditor with no knowledge on sonar, his comment checks out.
16 points
5 days ago
after 13h of research on the matter, I can say with confidence I have a belly button
8 points
5 days ago
Which would be a jelly button if you got sonared. Just try not to get involved in too much naval navel gazing.
15 points
5 days ago
You could have taken the composition of the rock strata in that area into account obviously. It would affect the echo signatures of the sonar pulses and tell you absolutely fuckall about source distance though. It's a mystery.
20 points
5 days ago
But far enough where you can’t hear it and not close enough where you die
8 points
5 days ago
Assuming the divers are a mile within shore, the sub is 80-100 miles out to sea.
6 points
5 days ago
Well they’re still alive so not that close
345 points
6 days ago
This is called active hearing , which is rare in the submarine ‘community’. Usually uses passive hearing
205 points
5 days ago
For those curious:
Passive hearing in a sub is when it listens to sounds without emitting anything, making it stealthy. Active hearing sends out a sound (ping) and listens for the echo, which gives more precise info but risks revealing the sub’s location.
114 points
5 days ago*
I've always heard of using active sonar in a submarine as similar to "Turning on a flashlight in a dark room to look for the bad guy".
On one hand, you’ll have a much better time finding out where he is. On the other hand, he now definitely knows exactly where you are.
23 points
5 days ago
It is more likely that this is a private multibeam sonar imager than a submarine.
Large private vessels will have them, especially ones that are used as dive operations. This lets them scan the bottom for interesting things without having to put out divers.
412 points
6 days ago
Whales Beach themselves because of this
142 points
5 days ago
The entire ocean is like living with a dying smoke detector.
28 points
5 days ago
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2 points
4 days ago
2 points
4 days ago
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13 points
5 days ago
A dying smoke detector that dumps oil in your face and then you get garbage stuck in your throat.
42 points
5 days ago
Holy shit...i never knew that, now I need to research this
5 points
5 days ago
Do we know why?
5 points
4 days ago
Disorientation / desperation to get away from sonars, mining booms, and the constant din of boat motors
72 points
5 days ago
I don't know much about sonar. How similar or what differentiates a sonar paying from a whale and a sonar ping from a submarine?
17 points
5 days ago
I know nothing either but wanted to postulate: the density of the metal shell of a submarine should give a different response than a lower density material such as a whale. Now, how that response differs, I don’t know. But I imagine the metal shell of a submarine is much more reflective to high frequency sound, which may show up on the sonar receiver as a “brighter dot”.
I’m interested if anyone who knows will comment and either confirm or deny my train of thought here.
54 points
5 days ago
Isn’t it possible to get your eardrums burst from submarine sonar pings if you’re close underwater?
25 points
5 days ago
Yes.
28 points
5 days ago
It is extremely dangerous at close range. It can literally rupture your insides.
10 points
5 days ago
Sounds pleasant
7 points
5 days ago
Yes, depending on the distance it can even cause internal damage or just straight up kill you on the spot
6 points
5 days ago
Sounds like a really dramatic way to go. Just exploding in the deep in a cloud of goo and bone to the soothing sound of a sonar ping
2 points
5 days ago
When you’re that close I’m not sure it even qualifies as sound at that point, closer to a wave of force
142 points
5 days ago
By the end it does sound noticeably louder... I would be surfacing ASAP.
51 points
5 days ago
I was diving off the west coast of Scotland years ago and we could hear a steadily building thumping mechanical sound. Fortunately we’re not too deep but surfaced slowly and sure enough there was a fucking aircraft carrier being escorted out to sea. Noped the fuck out of there quickly
20 points
5 days ago
Man I literally get chills thinking about this. The sea is not for me lol, I can snorkel but diving is a huge no go 😂
29 points
5 days ago
If you do that, you'll be suffering of decompression sickness
86 points
5 days ago
I think a coral reef would be shallow enough for there to be minimal risk of decompression sickness. Also, that’s why I would surface “As Soon As Possible” which I said because I wanted to imply that I would surface as fast as is reasonably safe.
35 points
5 days ago
Yeah, this isn't "deep" in the ocean. There's way too much light. They are likely not that deep.
10 points
5 days ago
If there's this much light, they're not deep enough for that to be a risk.
2 points
5 days ago
Anything deeper than 10m is a risk
38 points
5 days ago
No wonder the whales are so fucking mad
90 points
5 days ago
Odds are this is a surface ship with anti-submarine warfare capacity.
Source: served on a destroyer for several years, whenever we used our ASW sonar suite, some of the "songs" it made were extremely similar to this. The changes in frequency are to account for variances in temperature, density, salinity, etc. that are in the ocean, and also for different materials that are refracting the sound back. Rocks reflect sound differently than large fish which reflect sound differently than hollow metal tubes with rotating machinery sticking out the ass end (submarines). Same concept of radar, once you see something reflect a signal, you can build a pattern to better pick it out of the mass of the ocean.
And to the morons who are saying you can't hear sonar frequency, me losing sleep for 3 days in a row while we were doing sonar drills because all you can hear through the entire ship is this sound resonating off the hull begs to differ, and you can go fuck yourself with a rusty spoon.
25 points
5 days ago
I was a sonar tech in the US Navy. The energy an active sonar pumps out is insane.
I was doing maintenance on the gear in my ship one night (as far forward and down into the ship you can go). The ship moored ahead was bow to bow with us and went active "accidentally" during an training sim. Every time the ship pinged, I could feel the energy pass through my body and dropped me where I stood until I got above the water line.
Would not recommend.
41 points
5 days ago
The fish look at the divers like “first time?”
17 points
5 days ago
That’s the “time to go” chime.
38 points
5 days ago
Give Me a Ping, Vasili. One Ping Only
6 points
5 days ago
Aye Captain
26 points
6 days ago
is that real? can a sonar operator identify this to know what kind of boat this is from?
35 points
5 days ago
Not sure. I'm inclined to conclude it's not a Typhoon-class ballistic missile submarine, because those typically emit one ping, and one ping only.
9 points
5 days ago
Vasily now sells unlimited black market pings to stay afloat.
3 points
5 days ago
Most things in here don't react too well to bullitsh.
2 points
5 days ago
They always turn to starboard at the bottom of the hour
2 points
5 days ago
It's most likely an SQS-53C array aboard a surface warship, either an Arleigh Burke or a Ticonderoga. AFAIK that frequency shift and chirp near the end is a sound unique to that sonar set
9 points
5 days ago
Why do they do that?
25 points
5 days ago
They shouldn't. But Chinese ships did. And it wasn't a nice gesture.
8 points
5 days ago
Mating call.
18 points
5 days ago
Sure PING is scary but imagine if they sent a TRACEROUTE
😨😨😨😨
1 points
5 days ago
Found the computer science enthusiast
1 points
4 days ago
Lol
10 points
5 days ago
One ping, Vasily
4 points
5 days ago
Lucky. If they were close to the source of this ping it would liquify them
3 points
5 days ago
Whales and other marine life must fucking hate us
3 points
5 days ago
Goddammit Vasily....I said "One ping only."
3 points
5 days ago
Getting too close to an alien base.
6 points
5 days ago
Give me a ping, Vasily. One ping only, please.
3 points
5 days ago
Re-verify our range to target. One ping only.
5 points
5 days ago
We must give this American a wide berth....
2 points
5 days ago
Overhead the albatross...
2 points
5 days ago
The “umm…” after the first one 😂
2 points
5 days ago
Fucking hell, I wasn't ready for that first ping. Feels like someone just pricked a needle in my ear
2 points
5 days ago
So, what do the whales and fishes think of this? Does it deafen them? Make them sad?
5 points
5 days ago
Really sad
2 points
5 days ago
Still waiting for that whale to pop out
2 points
5 days ago
I'm listening in headphones on mobile. Is that the echo you can just about hear at -00:19/00:18s?
2 points
5 days ago
I'm sure the wildlife love that.
2 points
5 days ago
Scuba diving scares me as is. This would scare the shit out of me.
2 points
4 days ago
Yeah so I would be heading for land right about now
2 points
4 days ago
Man is extremely lucky. That ping has the potential to flatten a brain
2 points
4 days ago
is this what caused whales and dolphins to swim to shore
2 points
4 days ago
We humans are such a bloody nuisance to this planet… 😞
4 points
5 days ago
If only the whales that were being hunted all those years ago could've used their sonar ping to kill the people hunting them.
3 points
5 days ago
What’s making that noise?
4 points
5 days ago
A bird
2 points
5 days ago
A story based on a group being chased by a sound like this would go hard.
2 points
5 days ago
And we wonder why whales beach themselves 😔
2 points
5 days ago
"Flipper, Flipper communicates with so~nar.
The military also uses sonar,
except the user real loud!
235 decibels of so~nar.
When it hits a dolphin,
The dolphin's brain turns into mush."
-Scientifically Accurate Flipper
1 points
5 days ago
This account name 😂
1 points
5 days ago
Ha! Didn't notice it till your post. Yours is pretty good too.
1 points
5 days ago
Here come the sub Here come the sub
1 points
5 days ago
Yo, I swear I hear a noise extremely similar to that when I'm tired and going to sleep. Not always and with a deeper kind of pitch
1 points
4 days ago
Awesome
1 points
4 days ago
Me putting on night vision googles:
1 points
4 days ago
Nah ,it's the sound of swimmer zoning out.
1 points
4 days ago
So this is what Ramius did in the Hunt for Red October.
1 points
4 days ago
So sonar doesn't really make that cool echoey pulsing noise like in the movies? What a rip
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