The Last Thing You Hear

► MY HAT mrslavs-hideout.creator-sprin... This sound is so powerful that it can really destroy you. What makes this sound?
--------------------
► Discord / discord
--------------------
0:00 - intro
0:42 - sonar
1:07 - active sonar
1:40 - what are decibels
2:57 - sonar decibels
3:45 - how sonar works
4:19 - most powerful sonar
5:36 - sonar destructive power
7:18 - real stories
8:14 - sonars are op
8:58 - movies fake sonars
9:37 - real sonar sound
9:51 - sum it up
10:13 - dad joke
#mrslav #loud #sound

[@justahappytroll]

"Still not as loud as a sneezing father" I'm telling you father sneeze litterally can destroy an entire universe if they go 100%

[@aliceberethart]

Funniest and truest thing anyone has said. My grandfather's sneeze is equivalent to the merger of two super massive black holes.

[@SCP--bm6td]

confirmed, it cause the last end of the world scenario. The SCP foundation have to move across to this dimension.

[@cursedbusta3774]

And they're just using 0.0000000000000000000000001275192856290856 of their power

[@krishanthkumar72]

@@aliceberethart Same here, my grandfather's one is equivalent to a Big Bang

[@rimu55555]

they only used 0.0000021% of their sneezing strength

[@Frankintosh]

160 km and it can be still heard, it's incredible

[@blinded6502]

Not just "listened". It would be insanely loud

[@wireless-earbuds-brain-tumor]

02:45 - did someone say *Davie504* ?

[@mihajlomilosevic4931]

100km is still around 140 to 160 decibels

[@RGV2300]

Not just listened, that thing hits you.

[@kangsate3459]

And killing you

[@40below1000]

The Canadian Navy is doing an underwater demo ex just down the coast from me this week, and besides using bubble curtains to absorb the sound of the explosions the Navy operation is overseen by an independent whale spotter who will shut everything down if whales or other large creatures are seen in the vicinity. It's nice to know these issues are being noticed.

[@zaloskog]

Other militaries should learn from that example

[@TheEDFLegacy]

Happy to hear this!

[@cnone3785]

Us 2 the south of ya don't seem to care or more focused on how it helps us & not the disadvantages of its use. Mabe we will learn 1 day. But prob be 2days 2 late.

[@StarSailor1343]

@@cnone3785I agree!! The U.S. needs to get itself together in every aspect, if you ask me

[@mifphilip]

for people who don't know. Every time you move up and down 3 decibels the sound intensity doubles. so 235 decibel (dB) is double the intensity of 232 dB.

[@TheEDFLegacy]

😳

[@EduarBeta]

rule of 3db

[@HolldollMcG]

I didn't know that!

[@fabetty0403]

It's almost exponential growth. Exponential growth's a fricking horrifying thing.

[@sansprobus7209]

Why? Why not just write a linear scale? Why inject unneeded complication by making an invisible rule change? what's the point? Why waste time like that?

[@user-gm4fy7ex5k]

As a sonar technician it amazes me how accurate this video was, I never saw such a detailed video that show the little facts about a sonar, from how it works, types of emissions, main structure and even how different sonars have different emission sounds, amazing video dude keep up the good work.

[@MRSLAV]

oh wow, thanks, means a lot to me

[@susysusy1345]

As a sonar ping I confirm this is true

[@Ardenict]

As a sonar itself i confirm this is true

[@white_mage]

@@susysusy1345 i now know your location

[@moalchemie]

@@Ardenict As a submarine i can confirm this is true

[@anthonyavila9470]

I served on navy ships capable of sonar and even inside the ship you can hear the sonar noise at a decent loudness. It's scary to think divers hearing it.

[@camina0464]

The first time I heard sonar in berthing it was awful

[@COOLMAN11157]

@@camina0464 tf in gods name is that pfp

[@angrytigermpc]

I was on a ship that didn't have sonar, but was moored across the pier from a DDG. One night I was standing POOW, when suddenly I hear the rising whistle-chirp. I was like "what the hell is that?" OOD was a Chief who'd been in the Navy for a minute, said that was the... whatever it's called, standard? ping from a DDG's sonar. I can't imagine they were blasting it too loud, being moored up at base, probably some annual PMS check pushed to the middle of the night or something, but it was still more than loud enough to propagate through the air and across the pier to where I was (or maybe it went through the hull, idk)

[@Jack-gy4dk]

@@COOLMAN11157 you have an anime pfp that’s even worse

[@thepickle6406]

@@Jack-gy4dk Just put them both outside of the submarine

[@CorvusMoon22]

I’m a NC native and back in ‘05 there was an incident where dead and dying whales and dolphins were washing up on the shores of the Outer Banks. Researchers came to the conclusion that the most probable cause of the issue was active sonar from Navy testing. I wish there was something in place to better protect our beautiful and endangered whales and dolphins.

[@SuperNova496]

or held those idiots accountable

[@prestonburton8504]

i remember this - happens again several times since -'lets just blame it on ocean wind turbines lol"

[@tertiaryobjective]

@@SuperNova496 Probably happens all the time, it's a byproduct of using sonar, killing marine life.

[@kevinb3812]

This is so disturbing!

[@Keyboard-Emperor]

If you have bones Vibrations of that frequency are going to be hell. Science class Time!!! What Element inside of you is most subseptible to being Rattled apart from Vibrations? Hint, the one that is responsible for fusion.

[@benjaminlewis671]

I was diving near a naval destroyer when they went from passive to active and that was the most intense thing ive ever experienced. I could feel it in my brain. The Navy screwed up, they were supposed to be denied the ability to use active sonar without pulling the divers from the area. We were working late and shift change didn't mention the divers.

[@TheEDFLegacy]

I'm shocked you're still alive to tell the tale! 😳

[@aarongodinomartinez8760]

Holy sh**t bro, loud enough to make porridge with your brain, so intense that the water boils by itself, even the biggest living being is so scared that rathers to die, his power is over 3000! You can almost hear it from the coast of another country and not even full power and you are telling that a little shiet, not the strongest, not the greatest, the fastest, supposedly the most intelligent by far but not always noticeable... survived to tell it? *Well shiet man, awesome*

[@Samsonsamurai]

Damn never thought I’d be afraid of something so infinitely rare

[@ninab.4540]

It's the new quicksand!

[@dioppio1487]

It’s like the new “the sun will die in 1 billion years”

[@minimalgrammar1276]

Not as rare as y'all think.

[@daltonmiller5590]

Rare for us, maybe. But for fish, not quite so rare. I never felt so bad for fish. I wonder just how many die from this each year?

[@JamesSpeiser]

@@minimalgrammar1276 yea what the hell are they talking about

[@BasilVT]

for curious individuals, you do NOT have to be worried about sonar while diving, unless youre out in the middle of the ocean or something VERY far off the shore. there are extremely strict limitations on the distance from any shoreline that a ship or boat is allowed to active ping.... that being said, iirc, the fathometer stays active in more situations, so if you manage to be directly under a ship or boat for some reason, you might get superpowers

[@vapor404]

I think it would just turn me into soup

[@tugrulserhat]

Or a super power might get you 😂

[@supersonictumbleweed]

@@vapor404 he meant it could make you souper

[@doejon9424]

Any verified stories, where this sonar melting has been intentionally on a target(s) ? Like targeting an entire enemy beach or something

[@joshuagollaher9614]

@@doejon9424a submarine doing that would be a very easy target

[@Narokkurai]

It does actually make me a little sad to think just how much damage has been done to ocean wildlife by sonar. The ocean is very, *very* large, but given how far sonar travels, we may have killed entire ocean ecosystems with our ships without even knowing it.

[@minerock16]

When I was working on the USS Theodore Roosevelt used to hear a few different pings, all similar to the SQS-26 played here. You could hear it all the way in up to deck 1, hangar bay level, but only inside compartments. The deeper into the ship you went, the louder it was. Was told its the destroyers pinging off the carrier for various reasons, including discouraging unfriendly subs and trying to find our sub just in case they weren't being stealthy enough. The carrier rarely activates active sonar because they dont want to be pinpointed, so the destroyers in the surronding 100 sq miles do the seeing for it

[@mr.engineear0987]

Ever thought about how lame most commenters on KZbin are? Arguing over the most little things is truly a lot of peoples talent 💀 watch my reply get attacked in some way lmaooo Not towards you though mostly replies and that

[@dannyburns723]

that is so cool. just learned a lot at 7am thanks for that. not the government being like 👀👉 are you stealth enough? i dont believe you, im checking.

[@dangeary2134]

One good reason for the carrier operating its sonar is not to find the sub, but to HELP the sub. The submarine would be able to not only locate its friend, but the sonar would “illuminate” everything around the carrier and its group quite handily, and not give the location of their underwater protector away. The sun would use the data from the carrier’s returns to see the enemy, and not activate its own sonar, which would give it away instantly. For quite some time now, passive listening has become the best way to track other seagoing objects. Sonar operators can tell the difference between “biologics” and man-made craft quite easily. That’s why subs are made to be so quiet.

[@bforce3824]

When I served on the Midway I heard the same thing. It's pretty fascinating

[@ch0wned]

That's wild... never thought of it like that. I've been swimming in the BVI, as a child and one time I jumped into the water and heard the most peculiar sound of my life. It was painful, it was incredibly high pitched. I stopped swimming and remarked about it to my parents. I asked them to jump in and hear it but they didn't want to get wet at that moment. So I did. The sound was still there, loud as ever. The next day... It was gone! That boat must have been miles and miles and leagues away. I'll never forget it but I just filed it under "weird stuff" and now, my friend, I think you've helped to solve this childhood mystery of mine! Thank you!

[@magical5181]

Was it a bit like the sound of 9:42? Did it last long or shortly?

[@Beau-Bo]

oh!!! when i was in mexico, we were hearing a little ringing sound underwater. we didn’t know what is was, maybe dolphins… but that would make any sense. but now i realise

[@watosmate8935]

I got really bad tinnitus and affected me so much from screaming high pitched metal on a lathe, this would be nightmarish

[@NAaPALM51]

Could be just the fan of a boat engine makes like a high pitched sound underwater and you can hear that miles away from the boat

[@tag5848]

@@magical5181 if that was the sound im pretty sure they'd be dead or deaf

[@OneBiasedOpinion]

That recording of actual sonar ping helped me further realize just how scary naval work can be, especially in the military. Not only is the sound itself unnerving, but imagining hearing that in a pressurized tube underwater knowing that it might be an enemy about to blow the walls around you in…

[@RocketRoberts]

If they can "see" you, you can "hear" them LONG before that takes place. You know where they are (bearing), but weapons may not have the range needed to engage.

[@OneBiasedOpinion]

@@RocketRoberts keeping in mind that I know NOTHING about submarine warfare or any nation’s naval practices, my comment was more getting at the fact that sonar alone doesn’t tell you WHO the other vessel is. I’m sure there are radio verifications, known schedules, etc. to help minimize confusion and friendly fire, but I would assume that there can still be a bit of uncertainty when sonar returns an unidentified vessel on scope and they ping you back.

[@RocketRoberts]

@@OneBiasedOpinion True. And in the real ocean, there's a ton of noise that makes detection often quite difficult.

[@beeyah805]

​@@OneBiasedOpinion once, on station somewhere in the north Atlantic, we started hearing what sounded like explosions coming from overhead. Took a few minutes for control to send out the word that is was just a Norwegian vessel doing ocean floor mapping🤦🏽‍♂️.

[@OneBiasedOpinion]

@@beeyah805 I’m sure they were not-so-pleasantly surprised to see a Navy submarine underneath them as well. :)

[@Biketunerfy]

All military sonars have one thing in common. They all have a frequency modulated slide going up. In the sea there are different layers that sound can bounce off so in order to pierce these layers in depth they use what’s called an FM slide. It’s very technical and to long to explain in detail but if you look on a sound graph it’s a up slide on the graph and each unique slide is unique to each navy so when a warship or submarine hears the FM slide you can tell which navy it has come from.

[@brianjaber3171]

I have to admit that I really enjoyed your video. I’m retired NAVY but worked with a specialized helicopter unit and didn’t see much ship time. I did hunt subs from the helicopter with sonar both active and passive bouts so I enjoyed ur professional clarification on sonar for me. Thank you - well done and keep up the good work. Now I’m looking forward to more.

[@periodictable118]

Keep in mind 196 decibels is the maximum possible sound in air (since the peaks would have 2xatm and troughs would have 0 pressure). In water it can go way higher, but 235 dB is just insane

[@dmitrygronsky2832]

I believe it's not, since you still can pump on the "positive" scale of pressure. Yes it won't be symmetrical but still you may put more energy into the wave which is decibels about at the end of the day. Not sure if you consistently can do these blasts in a consistent periodic manner though but at some frequency range (as function of peak pressure) you can I think

[@linuxtuxvolds5917]

anything about 196 db is just an explosion

[@user-el8zv9hx6r]

That's interesting, I've never considered it. Why can't pressure be negative?

[@Derekzparty]

@@user-el8zv9hx6r 0 atmospheric pressure is a literal vaccum. You can't go below it because there are no molecules left to remove. Heat is very similar situation. Stars can go into the 10s of million Kelvin, but nothing goes below 0 Kelvin... technically nothing can achieve exactly 0 Kelvin either only extremely close. The Kelvin scale is just Celsius with 273 added to it 0 Kelvin = -273 Celsius

[@chipsmcgee3702]

@@Derekzparty Never thought of it like that. Some of my hobbies and past military experiences alluded to negative pressures. Take thermobaric warheads for instance, they essentially create a vacuum that is instantly filled with the surrounded atmosphere. This "negative" pressure is the main mechanism for injury in their design as the atmosphere around you accelerates towards the vacuum. Just semantics in the wording.

[@marcello7781]

This, along with death by pressure difference, is one of the things it scares me the most when it comes to divers.

[@seregarublev8915]

The bends is terrifying

[@pixoe]

@@beacool486 lmao

[@phantomfeather518]

D E L T A P

[@lyrimetacurl0]

Toothpasting

[@devilous_4374]

@@phantomfeather518 if it GOTCHA, it GOTCHA!

[@namibiaathens2782]

I don't normay subscribe, but you have my vote cause this is everything i want from a youtuber. I learn alot and the way you present the info is easy to understand without being too simple and to top it off theres no unnecessary flashy theatrics. I always see what i came to see

[@paravoidy]

“Still not as loud as a sneezing father” bro caught me off guard in the last 3 seconds. This video earned you a sub 🤙🏼🤙🏼

[@obamabinladen235]

I remember hearing an active sonar ping while swimming around the reefs in Maui. It sounded so mysterious and kind of haunting. Definitely not like the “ping” in the movies, but more like a sweeping series of computerized beeps

[@michaelray3865]

Yes, that’s the modern sonars that use different frequencies and modulation than the WW2 pingers.

[@kptlt.phillipthomsen5973]

WW2 era sonar worked differently so yeah it sounds different

[@theoldatlas]

Lucky your brain didn't melt😮

[@battleoid2411]

​@@theoldatlasyou have to be fairly close to the sonar for that to happen, like inside a km, they won't be firing pings close enough to where most people are swimming to actually cause injury

[@LucasGuillemette]

I would lose my shit if I heard anything as creepy as that sonar at then end there. OMG that is a blood chilling sound.

[@envy7579]

Creepy to know that the last thing you hear underwater sounds like something is trying to grab you.

[@Correctronic]

It grabs your brain

[@comrademoshi1028]

@@Correctronic then shakes it into a pulp

[@KOTO-cod]

@@knie1172 slimy soup

[@xxxbaph0metxbdm871]

@@KOTO-cod soupy soup

[@enliven7648]

@@xxxbaph0metxbdm871 forbidden soup

[@Kman1989]

I really like the way you emphasize the seriousness of these situations. "Let me say that again" So we understand just how serious it is. Wild stuff

[@staceyshade3418]

This is very enlightening, I had literally zero idea how sonar worked. And now I feel like I'm completely caught up with another technology. Very comprehensive information as always. Thanks you brother

[@PJH-vd7ve]

I really love the creepy and yet educational vibes of your videos. It's really unique!

[@CreativeCommons277]

Yes absolutely!

[@fatcerberus]

I feel like… I’ve been kidnapped by terrorists and am being tortured by being forced to learn obscure trivia until I can’t take it anymore and give in to their demands. It’s definitely unique, but just unnerving enough that I can never get more than a few minutes into one of these videos.

[@sa.04]

@@fatcerberus thats your problem

[@fatcerberus]

@@sa.04 umm... I never said it wasn't?

[@wireless-earbuds-brain-tumor]

dude makes 16 k clicks in 1 hour, insane

[@RichieP]

Audio Engineer here, just wanna give massive props to the amount of research you did on the technicalities of sound, it’s structure, and how it travels. For a video being about a sound that kills you, you did incredible with every aspect of information you provided.

[@TM-fx5le]

Where do you work?

[@RichieP]

@@TM-fx5le Not work, Graduate in March for a Music Production degree

[@sjv9147s]

At 1:50 the masked presenter claims that +10 dB means "it's 10 times more powerful". I'm not sure what he is trying to mean by this. Technically, a +6 dB gain = a doubling of the volume. In terms of human perception, however, it takes +10 dB for a doubling of the same. This fact is well-established in Psycho-acoustics. The math is based on the Inverse Square Law, which applies to Point-source propagation. I'm an electro-acoustician. My specialty is Sound Reinforcement Systems Engineering. Be that as it may, I'm no specialist where the medium of dissipation is water.

[@DreStyle]

and you also agree you need protection from 135 ?? great engineer here you are ....

[@desertman1139]

That’s a great comment!

[@smurp_com]

Wow great video @Mr Slav ! Informative, well-paced, well- illustrated and exampled -- to say nothing of amazing and even, funny. Nice job.

[@CombustibleL3mon]

Thanks for such an informative and entertaining video, that ending joke cracked me up too 😂 You just earned a subscription, Mr Slav!

[@IcyBrown]

10:14 as a Slav myself, I can confirm that a fathers sneeze can do more physical damage than a sonar

[@manuelpimentel2085]

I confirm, as a Portuguese man myself.

[@PhonyCh]

As a french son who have to carry every baguettes my dad produce when he sneeze, I also confirm this affirmation.

[@IcyBrown]

so you guys are saying that this phenomenon is intercultural? 🤔🤔🤔

[@PhonyCh]

@@IcyBrown indeed my friend

[@sonicszuetomyt5448]

Typical Pierogi Enjoyer

[@Daniel-hj6ri]

My dad sleeping : " As if they can handle even a FRACTION of my power " * proceed to melt reality by snoring *

[@thisisrex1676]

Hell at least sonar gives you at least some time to escape (or so I think) But a dad snore doesn't That's what makes it deadlier

[@SonofGuilliman281]

@@thisisrex1676 Dad snoring underwater.

[@isabelaatenska]

Gave the 69th like, noice

[@krab8599]

@@SonofGuilliman281 explodes your ears, eyes, brain, lungs

[@SonofGuilliman281]

@@krab8599 No, they can create a blackhole.

[@hedleyt8095]

I had a sound system in my car, years ago. It checked out at 173db, probably could have gone louder but that was drawing a LOT of power. Great video and awesome content mate, keep it up!

[@knikkaknikk86]

That would be 163dbs today

[@mysteryneophyte]

I had no idea it could be that dangerous I just had never really known anything about sonar other than what it does. Awesome video.

[@DHCR-core]

For the record, a blue whale call underwater is around 160-180 decibels, so their echolocation can actually damage your hearing.

[@banjark1944]

i think 180 would severely injure you, maybe fatally even

[@saratavington5435]

And Sperm Whales can actually rupture organs with their sonar clicking

[@leociresi4292]

Elephants can emit a rumbling sound below the limits of our hearing

[@johnfrench4137]

@@saratavington5435 and they can focus it to a point thanks to the stuff that gives them their name... so they can literally boil you under water.

[@LuisLopez-zh9kh]

It's almost as if we were never meant to get in the ocean

[@timl8258]

As a 26CX technician, I have to say that this is a pretty good video. As a side note, I had divers working on my ship one night and a ship on the next pier went active. The divers were extremely unhappy.

[@xeonthemechdragon]

That would be terrifying

[@Arkimedus]

@@bananabreadloaf dont know how strong the specific sonar signal was, the distance between each pier, nor how long the divers were in the water.

[@timl8258]

@@bananabreadloaf I can say that the divers were about 600 feet from the ship that was pinging.

[@noktu]

Stop larping brother

[@starcraft2own]

@@noktu It's funny reading comments like this and to imagine how boring their lives must be. Brother, a huge majority of people do live more interesting lives than you, just accept it.

[@FenrirNox]

Wow, I had no idea about many of the things about sonar technology. Thanks for the video fellow Slav!

[@mortyrosenstein4211]

For all those concerned about sea life, the Navy has placed restrictions on active emissions in specific zones with concentrated wildlife and closed environments. For example the PNW and Strait of Juan De Fuca. Intensity/gain and other restrictions are in place for main frame active. High freq and other active necessary for bottom sounding/close traffic are still allowed.

[@skurneha7163]

"This sound melts brains" Me clicking on the video: Well let's hear it then!

[@hosentrager7743]

@linus cat tips yep me too

[@zacharylansing]

Lol

[@aqa5794]

Men have been listening and surviving to BRAIN MELTING sounds from the time of Adam and Eve ... After reading comment all MARRIED men stand up in salutation !!!

[@Jake-vw3bj]

My dad was a sonar technician back in the day. He told me pinging sonar was a valid weapon against enemy divers.

[@Trancer006]

does it not affect the enemy marines in other submarines?

[@captainmurphy52]

Yes. On the ship the divers doing ship husbandry work are required to walk with you and visually verify the active sonar transmitters are tagged off.

[@namelesspotato3531]

@@Trancer006 submarine was designed to sustain against pressure

[@xmlthegreat]

@@namelesspotato3531 and also to reduce sound transmission from inside to outside, which works both ways.

[@Zaniahiononzenbei]

@@captainmurphy52 is ship husbandry how we get tug boats?

[@What-The-John]

Imagine just swimming at the bottom of the ocean, pitch black. Then you hear a sonar.

[@skies1089]

Incredibly educative video❤ loved it

[@jwilde642]

I remember being on a sub and being actively pinged by a destroyer. It was physically painful, even at a distance, even with the transition from hull to the air inside the boat.

[@i-love-comountains3850]

That's wild as hell.

[@jwilde642]

@@i-love-comountains3850 There was a very shallow layer below us at the time, so we stayed shallow above it, and the active pulses just bounced around between the surface and this layer, jumbling up any returns the destroyer was getting and making us very difficult to find.

[@lautaroespinosa445]

Was this during active combat? That sounds stress inducing

[@DreamskyDance]

So.. the sonar can basically also be a weapon ?

[@Zadamanim]

@@DreamskyDance Yes he mentions in the video that sonar was weaponized to discourage enemy divers.

[@Pillow_Princess]

The loudest sound I've ever heard was the thunder from a lightning strike hitting the garage I was in. You really feel the sound when that happens, like a pressure wave.

[@miker3174]

Are you sure it struck the garage? Lightning hit a tree 40feet away and didn't hear a thing just saw a flash and the tree catch fire. Also had strike hit power pole at a stop light we were at and wasn't too loud, the guy next to us took off through the red light. He got scared from all the sparks and got lucky nobody was coming through the intersection lol! My wife kept her foot on the brake as the sparks landed all around 😂

[@Pillow_Princess]

@@miker3174 Definitely. I say garage, but it was just 6 telephone poles holding up a tin roof and a gravel floor.

[@miker3174]

@@Pillow_Princess that strike in the backyard was crazy it was just a flash and the sound of the tree breaking and catching fire was the loudest part. I've heard louder thunder like a mile away than the noise from that one and that was closest strike not being inside car or house. I live in lightning capital so get a lot of lightning ⚡ The loudest so far was actually some cloud to cloud right above my street it shook the whole neighborhood windows rattling and all the neighbors were talking about it for awhile. I saw the bolt go right over our house, it could have struck somewhere but think it was just cloud to cloud it was a long bolt.

[@TheJerseyNinja]

@@miker3174 probably wasn’t as loud because it hit an object and not the ground. I’ve felt a big thump of lightning hitting a few hundred feet away plenty of times in my life. So if you had lightning strike 40 feet away from you, you would 100% feel it A LOT unless it hitting a tree dampens it vs striking the ground

[@NefruSimons]

I agree, i once saw the lithning hit the pole of opossite building with a big one. Even trough the closed windows the noice was kin to the oposite building blowing up. I even saw the pole got almost to the melting point as it was for good few seconds so hot it was glowing... I even physicaly fealt the noice, as it rattled my insides a bit.

[@hannahrock9561]

Dang that last one made me cover my ears and took a few minutes to recover from completely. I’m super sensitive to high pitch noise so that was definitely something I do not want to ever encounter.

[@totallyfrozen]

As a SCUBA diver, I appreciate this video very much! I never knew any of this! Thanks. I had no idea sonar was so dangerous to divers.

[@RecoveringLoLAddict]

I started playing Barotrauma (submarine simulator) some time ago, makes sense how aggressively the fauna reacts to the seeing your ship simply existing. Active sonar for navigating is giving them brain aneurisms with each pulse.

[@ugo7395]

You should use the real sonar addon

[@votrox991]

@@ugo7395 the whole reason i looked up this video lmao

[@nosepowder69]

@@ugo7395 The real sonar mod is outstanding, 10/10 would get tinnitus again.

[@artemefimov8215]

​@@anon1403it'd be a pain to use sonar in multiplayer

[@_NekOz]

​@@artemefimov8215But that is the fun part.

[@rajwindersingh7132]

50 decibels are 10 times more powerful than 40 decibels ..... I really didn't know that ... Great video 👌

[@fatcerberus]

Yeah, it’s a logarithmic scale, like earthquake magnitude. That’s what makes loud sounds so dangerous, we perceive loudness increases as linear (going from 80-90 decibels feels the same as 70-80) but they’re really exponential.

[@sweethomealabama4381]

@@fatcerberus the scaling of magnitude is pretty similar to VEI, each number is pretty much more than 10x stronger than the inferior one

[@b-zar8912]

@@sweethomealabama4381 I’ve no idea what VEI is, but cool. We can also compare it with the ph scale which is also logarithmic and indicates a 10X decrease in H+ for every unit decrease

[@rgerber]

I'm still sceptical 1 dB being "twice as loud". It might have more volume over the frequency spectrum, but it can't be purely the pressure of soundwaves. As Mr. Slav said: A Sonar is 10'000'000'000x (BILLION) as loud as an jet engine!!! that would literally just tear any human made material apart....

[@RGV2300]

There is something about waves (of different kind) that scales are made logarithmically to messure them. Richter scale is logarthmic too, in example.

[@LifekaCode-DecodeMSCreation]

Awesome explanation on sonar sound. Good job bro.

[@djohnsto2]

You can hear it from sections of ships under the water line. But the SPL of depth and terrain mapping is vertically-oriented and lower, it's nothing compared to the horizontally-oriented sound level needed to detect ships far away.

[@dude157]

I didn't realise active sonar was so powerful, I just assumed that incredibly sensitive instruments were used to pick up the reflections of a rather mundane ping. For reference a space shuttle launch was around 170dB. That means active sonar (at 240dB) is 10 million times louder than that!

[@tychosis]

It's worth nothing that you can't compare SPL between water and air because of differences in the reference levels (sound in water is dB re 1uPa and sound in air is dB re 20uPa) and the density/sound speed of the medium. If you're just comparing perceived intensities the difference works out to about 61.5dB. So that active sonar at 240dB (in water) is really only as "loud" as a ~180dB sound in air. (Don't get me wrong, it's still loud! But it isn't going to turn you into paste or anything...)

[@partyofgaming1]

Wait so how much louder was the kratokoa eruption

[@Lethmyr_]

No. You cannot compare dB in air with dB under water just like that. A noice of 190dB under water is roughly equivalent to 128dB in air.

[@jameshowland7393]

It has go be that loud to do its job.

[@literallyhuman5990]

@@partyofgaming1 depends on how far away you're to the angy boi. If you're close to it, you probably hear it like a very loud thunder struck something close to your house. Source: I live near a volcano, I know how they sound. But, since toa is in the middle of Sunda strait, and the largest explosion is happened before microphone was a thing. I would expect it'll be around 170-190 db on its mountain level.

[@alexejtolstoy735]

It makes me sad knowing that a lot of sea life has to deal with this torture and not knowing when their brain will be turned to pudding 😢

[@NotCondorTheBird]

I know :/ I never even really thought about how sonar could absolutely ruin aquatic life

[@brikinahonix]

We just don't deserve this world.

[@xXtuscanator22Xx]

@@brikinahonix Why don’t we deserve this planet?

[@christopherfowler1010]

@@xXtuscanator22Xx we destroy it

[@rebexokay2938]

@@christopherfowler1010 then?

[@trinitymaker5833]

I was a Sonar Tech in the Navy. First of all, the “transducers” you’re referring to are a stacked array or piezoelectric crystals (ceramic). You push a massive current into them to make them “tweak”, then you release the current and the ensuing sound is the “ping” you hear. Also, the Navy never bounces sonar off the bottom, unless they are depth sounding. Sound is lazy by nature. It always wants to go slower. Sound travels 3 1/2 times faster underwater than it does through the air. And there are three things that affect sound underwater. Temperature, salinity, and pressure. These three things always increase the speed of sound underwater. So when a ship actively transmits, the sound travels in a downward direction in search of a submarine. As the sound waves go deeper through the water, the pressure begins to build, and the sound starts to speed up. But sound is lazy, and it wants to go slower, so it curves upward towards the surface again. As the sound gets closer to the surface, the temperature of the water starts to go up, and the sound starts to speed up again. And since sound is lazy, and it wants to go slower, the sound curves back downward. And this cycle repeats, depending on the conditions. These would be ideal conditions to actively track an enemy submarine. It is called a ”sound channel axis”. And I’ve never heard anyone picking up submarines, or any other object with an active transmission from hundreds of miles away. However, with the passive systems like the TACTAS (tactical towed array system) you can passively detect shipping traffic (prop rate, blade rate, and auxiliary components) from over 100 miles away in the right conditions.

[@jolereplica]

BRO I just start the video and bro that shit not only scared me/caught me off guard, it legit hurt me in my head.

[@neet23air18]

it's scary to think about how baadly this would affect the underwater marine life..

[@dusky6280]

thats why they don't use it all the time. Obviously.

[@bythegraceofadoni]

@@dusky6280 Oh OBVIOUSLY is it?

[@dusky6280]

@@bythegraceofadoni Yes? Read a book?

[@bythegraceofadoni]

@dusky6280 Oh, so, you're suggesting things can only be obvious if researched. So even though it's obvious the sky is blue, I should read about it to find that out

[@dusky6280]

@@bythegraceofadoni Yes? What- you don't value being educated? Are you incapable of logic? Are you 12?

[@almightytwinkie2171]

Damn, just listening to the SQS-26 made me wince in pain. Even through a monitor it's painful to listen to, I can only imagine how painful and terrifying it'd be in the water.

[@AcantostachaLichtmesz]

... and the sneezing father!

[@shinohara9619]

Hyperacussis speaking here, definitely will be painful just a split second of this noise would definitely pacify me

[@ImNo0nDrugs]

unless you have a medical condition or volume max, how. it isnt that "painful" to listen to through the monitor

[@almightytwinkie2171]

@whynotbedumb my ears are sensitive to high pitches. Some rappers, with the way they pronounce the letter "S", hurt my ears

[@IcyBrown]

And it sounds haunting af, imagine going for a quick dive somewhere and hearing this while doing so; I would get the F outta there and stay out of the water for at least 24 hours

[@microtheproto4865]

I absolutely love this guys voice, just so perfect!!!

[@TheEDFLegacy]

I never knew about how deadly or crazy sonar was. Incredible technology. Thanks for sharing! You just earned a sub. No pun intended. 😅

[@allaware1971]

Honestly, this makes sonar so much more genius than we thought. It keeps submarines safe from infiltration via divers like you see in games and movies.

[@the_infinexos]

Imagine trying to swim up to a submarine and you get vibrated into a red cloud

[@0xsergy]

The ocean is like 90% dead, genius indeed.

[@allaware1971]

@@0xsergy don't we already do the same with everything on land and air?

[@itsjayh]

@@allaware1971 does that make it better?

[@allaware1971]

@@itsjayh did I say that?

[@AlanTheBest97]

For people talking about the aquatic life being harmed, he was talking about millitary grade sonars, and active sonar use in the navy is not very commom as far as I know, usualy millitary assets stick to passive sonar because active has the downside of giving your position away since you make a lot of noise, and hurts wildlife... Also, active sonar has a much shorter range than passive since the sound has to come out of the ship, hit the surface of an enemy vessel and have enough energy to come back to your ownship. If the enemy is too far the sound might hit its hull (alerting the enemy he was pinged) yet not having enough energy to travel all the way back, leaving the active sub without any info since he wont get a return and the enemy alerted and aware of the active sub position since he can tell where the ping came from. While in passive sound only has to travel from the enemy to the sub once for it to get info. Furthermore, nowadays there are countermeasures to make active sonar much less effective by using a rubber like material to coat submarines hulls that make the active ping be partialy absorved and deflected intead of being properly reflected back.

[@randomthings1293]

What do you mean by "passive" vs "active" sonar? How is a passive one less damaging than an active one?

[@oran7260]

@@randomthings1293 passive sonars don’t make noise

[@Exxus61422]

"as far as I know" sources cited: my ass

[@AlanTheBest97]

@@randomthings1293 The video talks more in depth about the active sonar. Active sonar works like its said in the video the submarine makes a loud noise and sees if it is reflected back into it (if it is reflected then it can figure out where that reflection came from and extimate the range). But the sub still has to make this very loud noise wich would in turn give the sub position away. Nowadays however sensors technology is so advanced that submarines and boats rely on silent gigantic directional microphones to listen arround the water without having to "ping" and give themselves away, these mics are called "passive sonar" passive as in you dont have to send any signals that the enemy can trace for it to work, you just listen for the noise the enemy is making , this technology used to be very limited so submarines often crashed into eachother for example and were forced to reveal themselves using the active ping if they wanted to be aware of their surroundings. (in reality submarines are very sneaky but in turn they used to be as blind as bats, if they wanted to see whats out there they would also have to expose themselves to being seen) But now the tech has come so far that the use of passive mics out ranges the use of an active ping by a very large margin. These mics can even be towed behind the submarine so the submarines own noise wont interfere as much with them and they can pick up things from really insane ranges and all this while keeping the submarine stealthy. Not to mention that modern submarines have a variety of submersible drones stationed in them that aid with situational awareness and detection, so much so in fact that using active sonar is just obsolete in most situations because it always breaks the submarines stealth.

[@greggaming0988]

@@Exxus61422 Do you think that the navy is going to potentially kill multiple people just for some info every day? no they would use it if they were in a war and if was needed. It would make no sense for them to be blasting a very powerful and dangerous sound 24/7

[@davefave4351]

In the mid 70s I was at an air show at St. Mawgan in Cornwall when a Vulcan bomber did a pass along a runway approx 100m away and went into vertical climb... Loud.

[@Alenthas]

i figured sonars would be quite destructive up close but never could i have imagined it can be so devastating so far away as well

[@jameshowland7393]

9:43, that is an accurate recording of the SQS-26CX or SQS-53 (same modes and frequencies), in one of several modes, with positive FM slide. There is a LOT of reverberation, but it's still easy to determine what it is. Although he never says it, the SQS-26CX, or SQS-53 sonar systems are mounted on surface ships only, not on submarines. I was a sonar technician in the US Navy and was trained to operate, maintain, and repair these very systems.

[@josephconnelly7939]

If we were in a foul mood we'd request to go active to track a "contact" and set our 26 to CZ or Bottom Bounce and crank it 180 relative and ping the keel.

[@gotrickrolledyeah]

The sound looks like a 35 meter long fork on a giant plate

[@L4INDIA]

ok

[@user-el8zv9hx6r]

headwaiter tango

[@hi-nb5yk]

E

[@Dasycottus]

One point of correction: Modern submarines hardly ever use their active sonar. Surface warships use it frequently, but submarines basically only use it to navigate through super complex environments without crashing into things. Above all else, submarines must hide. Transmitting a sound at 200dB+ lets everybody know where they are

[@suibora]

Would it not depend on the type of submarine? Military's submarines are certainly all about stealth, but there are also civilian/research subs which sonar would be relevant to

[@Fanslerfarmstead]

@@suibora civilian vessels have some sonar systems onboard but not anywhere close to military systems. They usually use echo location equipment to avoid contact with other vessels or the sea floor. Which wouldn't require them needing 235 dB of sound to do so. Their not trying to find enemy submarines miles away like we are :)

[@suibora]

@@Fanslerfarmstead I didn't know that.Thanks for the information 👍

[@paake3134]

This was very interesting and new information, especially how strength of noise multiplies, not additives.

[@lukttk]

so the sonar can make as much waves as a stereo surround sound on a party. I've been at parties and i remember feeling my lungs vibrating too from the sheer bass

[@ThePersonNetwork]

The loudest sound I had ever experienced was at a Death Grips concert and they played the song Turned Off. When the loud fuzz that's in that song kicked in it literally blew past my earplugs and it was deafeningly loud. Been to many concerts but that was by far the loudest noise I'd ever experienced.

[@Pactastic042]

That's wild

[@SweetLolita]

McRide himself is sonar

[@Slamthulhu]

For me it was when I saw Sunn O))) live. They were playing a show in a medium size indoors venue in Copenhagen and it was awe inducing to say the least. For those that do not know they get their name from the amplifiers they use, the Sunn Model T's, which is a VERY loud amplifier from the 70's. One on its own is enough to make your internal organs rattle, and well Sunn O))) uses about 6-8 of them at the same time through about 12 cabs + about 6 bass amps on stage between the 2 guitarists and the bassist/synth guy. They easily hit 120dB and above, and you typically experience that for about 60-90 minutes. It's hard to explain how being at one of their shows is like but I have never experienced sound as intensely or viscerally as at that show, that's for sure.

[@shirophyx]

somehow i find random comments about death grips where i least expect it and it's always some sort of final destination, premonition type warning. already bought the tickets though so wish me luck

[@troutbummi]

Death grips. Death grips, death grips.

[@terraoftime]

you can hear active pings from inside the hull, its actually quit neat when you hear it but does suck if your rack is near the hull as it can be quite annoying when you're trying to sleep

[@PostingWierdVids]

I love you mr Slav, and your videos

[@xiaoyu88]

the sneezing dad joke at the end did if for me. I can hear dads sneezing from the other side of the neighborhood sometimes. amazing.

[@Shortybeard]

As a former Sonar Technician I applaud your accuracy in this video. Fantastic! Story time - the ability to steer and focus the active beam allowed for some sassy sonar techs (me 🤪) to figure out how to aim the active beam backward directly down the centerline of the ship, turning the whole ship into a resonance chamber. I'll let your imagination tell the rest of that story. (No one was ever hurt lol, but very annoyed)

[@Mr_Roomba_]

What i think is the best prank

[@shoemakerleve9]

Can the signal be heard outside the water theoretically or is the impedance mismatch too much and all energy is reflected back into the water?

[@link99912]

Dude literally compares decibels in air with decibels in water, the most basic mistake that leads to misunderstandings like the one this video is based on, and you call it "accurate" lol. I guess this isn't important info for a sonar tech.

[@gyorgischwartz]

Change the frequency and you can resonate that puppy till the bolts come loose

[@teopalafox]

@@link99912 he literally tells you the discrepancies in the video lmao.

[@teejaykaye4357]

I've been to rock concerts and monster truck rallies but no sound has ever been louder than huge claps of thunder directly over my house. That shit makes the world feel like it's exploding. But the most painful sound I have ever experienced was the shrill burst of tinnitus in my ears after jumping into water off a bridge. Kept going for several hours with an excruciating pain that wouldn't go away. Turns out I gave myself barometric trauma in the ears and came close to blowing out my eardrums... all from jumping into water from a height that everyone else I was with that day was fine jumping from. I can only imagine sonar would feel SO much worse.

[@RidesandRambling]

Ever seen Motorhead live?

[@Sorter_123]

I think i have a cure for what you are suffering from 👍🏻👍🏻 and it has been used in my culture for ages .. i hope you recovered but in case you did not , then i might be helpful.

[@HarzerI]

@@Sorter_123 i have very bad Tinnitus :(

[@unfadingtoast1]

If you tap the back of your head by crossing your index fingers over your middle fingers and then flicking your index finger back into position (making it slide off of the middle finger and hit beside the soft area at the back of your head) the tinnitus will go away

[@HarzerI]

@@unfadingtoast1 i heard from this several years ago. Thanks ❤️

[@thejohnson9204]

Very interesting video mate. Thanks.

[@user-gb8jp8ew6z]

Once i was diving on the open coast in croatia near a closed military zone. One day i could not go underwater because of a clicking sound. It was quite the same as flickering a lightswitch every ¾ seccond or something, and the noise was just a bit louder but way intenser.

[@tgnm9615]

I love how dramatic and entertaining Mr Slav videos are but still educational for us to learn something new!

[@danielstrachota5153]

This is the scariest and the most facinating thing I have heard in a long while. I never thought sonars are this powerful.

[@Peusterokos1]

IIRC in relation to your post, I read somewhere that if somehow it would be possible to produce soundwaves for 600+ dB it could create a singularity. I don't know how that works, but the fact a sound could theoretically create a fucking black hole is horrifying.

[@connergalles7106]

@@Peusterokos1 yea well we ain't do much to the water yet. Wait until humans start bending space and time underwater

[@chirpese]

thanks for melting my brain awesome video

[@ecchiboi2874]

Man, the more you know. Subbed!

[@swiftgaming665]

The sound the Sonar makes is terrifying imagine diving at low depth’s all on your own in the darkness when you start hearing that! Great video you really explained well what a Sonar is and how it works. 👍👍

[@dickJohnsonpeter]

Yea how is this not more of a problem? Commercial divers diving deep can't surface. They have to go through days of depressurization and would just die down there if sonar was used. And there's no way these ships know who's in the water in a 100 mile radius at any given moment.

[@rawnukles]

I was surprised how horrible it was. I can imagine some whales hearing that and choosing death on the beach rather than meeting what ever makes that noise.

[@Trgn]

Noise pollution. Marines mammals are constantly tortured by these devices.

[@GetFochD]

@@rawnukles yeah this is huge problem

[@hi-nb5yk]

E

[@zapador]

Just a small note for anyone that care to read. You should use hearing protection way below 135dB as less, like 115-120dB, can cause immediate damage. Prolonged exposure to around 80dB and up can cause hearing damage too.

[@kurtwagner16]

That was the comment i was looking for

[@zapador]

@@kurtwagner16 Gotta take care of the hearing, once it's gone it's gone! 🙂

[@killerhippo10]

facts bro. have had so many coworkers skipping ear pro while jack hammering or drilling like its no big deal.

[@moreroids_morehemorrhoids]

Long periods of time at 70db is very bad too (40minutes or more), that has caused a lot of damage to musicians, producers and mixing engineers even if it isn't "loud"

[@moreroids_morehemorrhoids]

@killerhippo10 that's how my father is destroying his hearing, 3 decades of heavy drill use and other loud machinery (I especially hate grinders). It has gotten so bad that when I did some tests on his hearing he could hear as well as an 80 year old man, and he is nowhere near this old. People protect your hearing humans weren't designed for loud sounds

[@patrickselden5747]

Fascinating - I didn't know. Thanks... ☝️😎

[@vitorstreetboys]

wow youre breathing amazong dude keep the good work

[@Youre_Right]

Jet engines sound is amazing. The fact you can hear an airliner passing overhead is insane. The plane is around 30,000 ft in the air and you can hear it clearly.

[@baronnuuke7821]

The planes you hear are few minutes max after taking of or before landing. There is no way you would hear anything at 10km altitude lol

[@jacobl9938]

@@baronnuuke7821 if you are away from cities or anywhere there is surrounding noise, you can very faintly here a cruising airliner.

[@lordfarquaad1195]

@@baronnuuke7821 bruh i hear them all the time

[@LordTrashcanRulez]

@@lordfarquaad1195 We call this dementia

[@Youre_Right]

@@baronnuuke7821 No. I live out in the country. The closest airport is over 50 miles away. While they may not be at 30,000 ft they aren’t on approach or recently taken off. It’s definitely not loud and if you weren’t paying attention you could easily tone in out.

[@GalaxynexusGamer]

Your accent makes listening and learning about this stuff so much better than the other channels. Just about every narrator I’ve found for channels like this are slow, depressing and it sounds like they have no real interest in reading a script. You make it much easier and more interesting to learn about and watch this stuff, thank you Mr. Slav! ❤

[@yajatgaming1642]

Fr

[@icsg7287]

those sounds are generated by AI

[@worldsmostevilman]

nice pfp

[@ericpowell4350]

It's like you're at a secret KGB intelligence briefing. 🤣

[@Secarious]

This genuinely scares me. I hate the concept of really big machine things that could just.. kill you by having it pointed at you or being right next to something when someone turns it on. I could have someone tell me this sonar system is completely broken, disconnected from power, turned off and is literally impossible for it work. Yet I would still probably panic if they tried to get me to stand right next to it.

[@SlumberBear2k]

most informative info i have ever heard about sonar.

[@xXtuscanator22Xx]

Two things: First, this technology, albeit damaging, is absolutely an insane feat of engineering. Second, I find it so interesting how vibrations are everything in the universe. They’re the key to the secrets.

[@jackjohnson291]

The Beach-boys understood it.

[@pupplementarypupplements5804]

Bro wtf kinda thought process is this I don't trust u

[@xXtuscanator22Xx]

@@pupplementarypupplements5804 My goals are beyond your understanding.

[@pupplementarypupplements5804]

@@xXtuscanator22Xx goal #1: rule the entire galaxy

[@frankr.jamesgaming261]

Mmm I still think giggeliwangs are the real secrets of the observable universe.

[@portcitypersona]

I have severe Tinnitus(since I was 5). I hear that sound 24/7/365. I coped using opiates, benzos, and can not sleep unless there is background noise. I have had life altering depression and I cry randomly for all my life. I still think I am strong for lasting this long(I am 42). I enjoy your videos thanks and apologies, I just rarely hear anything comparable to the frequencies from my ears(damaged, I think, by getting tubes in my oft infected ears as a child).

[@jackvalentine7403]

Warrior.

[@portcitypersona]

@@jackvalentine7403 :)

[@masterduelist3895]

You’re one of the strongest humans on the planet. Keep your chin up and show everyone your beautiful smile

[@petergriffin383]

You are very strong! I deal with depression by distracting myself with learning about the universe.. If you need a hobby get into cosmology, it's an amazing universe out there

[@dominikhajek8062]

Fuck man.. I couldn´t imagine how that feels even if I wanted to. Keep fighting brother! You are strong and I believe in you.

[@HeshO-yi3hh]

Somehow his accent makes it easier to understand and retain more info, maybe cause Im also not a english native speaker, interesting, great video

[@LokleyTheo]

That was interesting, thank you!

[@villainousthing]

9:43 just hearing this would kill me from fear alone. this is a horrifying sound

[@looseele]

don't you think they would've come up with something better by now that doesn't kill everything around it?… Oh wait this is the military we're talking about…🤨

[@HystericalHuntress]

@@looseele You can't reinvent how sound or physics work my dude.

[@SamukaNGL]

@@HystericalHuntress you cant, but you can use lasers to do the same as sonars, its more expensive but its possible, the problem is no one wants to use more money to do the same thing and "save some animals etc"

[@baph0met]

@@HystericalHuntress But you can outlaw murder, the army is basicaly killing all life around them including humans. Guess laws don't apply when it comes to government and army

[@SamukaNGL]

@Snapshot it is, there are already laser radars, Police use them and they dont burn anything, Im not talking about normal light lazers, Im talking infrared ou ultra violet, kiddo, the only thing That can happen is make someone blind if it in the eyes, in water the lasers Will take very long to burn someone and when leaving the water they all Change Direction so it loses all power, I think its worse killing a person than blinding it, but its justy opinion, airplanes use laser radar to calculate altitude, a lot of Cars use laser radar to emergency brake for you, you just need a more powerfull One and more of them, or One with more laser surface area, it is possible, kiddo

[@DK_178]

Strangest sound I ever heard underwater, while I was diving, working on a pipeline, whales, literally made my chest vibrate, so fascinating!

[@VulcanXIV]

There's a video out there where a guy is having a sort of Ted talk to a small seeming dining area. He was a marine driver/biologist kind of expert and his talk was about whales. He said that when you are interacting with them, their sonar starts to warm you up. You don't want to be in front of them, either. Something about lethality lol

[@aresgodofwar0422]

@@VulcanXIVsperm whales can temporarily paralyze you so if you are free diving with them you can drown.

[@Assassin5671000]

Just like sonar they emit sounds and some of them can kill you just by being near them

[@patrick86806]

that ending though... made my day! well done!

[@HDSME]

Fantastic vedio! Comrade thank uou

[@kentaltobelli1840]

NOTE: the decibel reference value is different by 61.5 dB for sounds in water vs air. So the sound intensity of 100 dB in air is actually equivalent to 161.5 dB underwater and vise versa. This causes confusion about "melting your brain" because the underwater numbers appear incredibly more powerful than the values we're more familiar with on land.

[@-Scrapper-]

That makes sense

[@BenHutchinson321]

That makes sense. I know that 235dB sound in air is impossible, and assumed the same for water, so I thought this KZbinr was just exaggerating when he said that number.

[@alexandernachev3471]

Is that the reason why he said 10 dB is x 10 times stronger (incorrect in pure mathematics, every 6db is ~x2 times) ?

[@ziga7382]

@@alexandernachev3471 no, in the air every 10 dB is still 10x louder

[@DrDeuteron]

@@alexandernachev3471 20 * log10(2) = 6.02.... so there are amplitude dB and power dB, which differ by a factor of 2 (since power is amplitude squared). I can never keep it straight, and will occasionly say "that's a 1 Bell increase" and ppl go "what is one bell", and I'll say "uh, duh? 10 deci-Bell, 100 centi-Bell, and so on". Just to troll the metric system.

[@howdydobuckeroo1204]

Now the real horror is when you hear that sound. But you are just doing whatever you are normally doing, with no way of knowing what is causing it as you try to avoid your brain melting. It’s like falling to your death. The horror of inevitability. Cosmic horror. Edit: whoops. Cosmic horror doesn’t count sorry Edit: Cosmic horror might count. I am very confused about the situation I am in right now.

[@RGV2300]

I don't think you hear much, but you start feeling a vibration, a wild one, like an hydraulic shock/water hammer repeteadly.

[@theuniverse5311]

you would explode.

[@mus1kal_the0ry]

good thing im not a diver

[@CatNigga]

Tell me you have no idea what cosmic horror is without telling me you have no idea what cosmic horror is

[@charliesalzman8580]

@Alpha do tell what is a cosmic horror

[@noxwill0000]

I love how Mr Slav channel is full of very different videos, but always in slav way

[@ebe7157]

vessels almost never use sonar at full power. Typically, you'd be fine swimming 500 meters away from active sonar.

[@dinkata2005]

The actual sound he played at the end is bone-chilling itself, even if it wasn't powerful enough to tear you apart. What we as species cause the other inhabitants of Earth is truly appalling...

[@exeterd9]

If you think this is bad look into VX chemical warfare

[@Morbidity100]

It makes me sad to think our oceans are hostile to their inhabitants:(

[@arandomanvil5989]

The real sonar sounds remind me of earlier industrial music, when it was still very Avant-garde.

[@BL_Enthusiast]

put the sound in maximum slow motion you will know why im saying this 8:16

[@juanjean3229]

6:12

[@eternalbrogamer]

For anyone wanting to experience it without risking your life in the water, there is a realistic sonar mod for a game called Barotrauma. It won't (possibly) kill you, but it sure fucks you up if you're not careful with the sound settings

[@mioszr.5128]

Oh, what is the mod name? Man this vid randomly popped for me and it got me so interested into sonars and sound. I didn't even know a 235dcb was possible, i thought that after certain point (i dont remember exacly, 180, 190dcb) sound turns into shockwave. Its so intriguing damn

[@eternalbrogamer]

@@mioszr.5128 you should be able to find it on the steam workshop just by searching for realistic sonar

[@Pandainapandasuit]

"Oddly enough, in air, a sound can't get any higher than about 194 decibels and in water it's around 270. This is because sound is an example of something where the measurements break down at either end of the scale. It's a bit like heat." You're on point!

[@Pandainapandasuit]

One additional resource. "Why is 194db the loudest sound possible? Sound is after all a pressure wave passing through the atmosphere, or through other materials. The 194 db limit is because at that level, the rarefaction part of the wave becomes a vacuum. The pressure waves can continue to increase in level, but are no longer linear."

[@asbdowasduwagibberish4700]

everything can be scary now

[@s.grimes404]

Great video!

[@patcowley6378]

i was on an Aegis class guided missile cruiser in the Navy... Our ship operated our sonar and it was a loud whistling sound that could hurt your ears... The luiodest sound i hjave heard is a missile launch on a ship....an MX2 surface to surface missile...it was deafening....