What if i told you there's a sound so loud hearing it can kill you or that there's a sound which is
illegal to play welcome back Charlie here today we're going to look at some of the most scary
and dangerous sounds ever recorded the first sound we're going to listen to is a very scary recording
coming from a woman's sleep tracker the recording comes from a scary real post on reddit a woman
was having a hard time getting to sleep so they downloaded a sleep tracking app she downloaded
an app called sleep ass the app gives you lots of information about your sleep and also records
your sleep all night long that way you can see if you're snoring or talking in your sleep but one
month after downloading this app she realized it would record a strange clicking noise every night
she had no idea what it was but she assumed it was simply something inconsequential in her
room but one morning after using the app for about four months she sees something strange
the app recorded the night before and again it had that clicking sound
but the app also had a very loud spike in sound so she decided to zoom in on that spike and play it
she heard herself sit up in the bed and say what are you doing there's a pause for a few
seconds and then a male voice says back to her nothing bear in mind this woman lived alone
the woman then ran around her house to make sure no one else was there but all of her doors and
windows were locked later that day the woman's friend suggested she post her experience on reddit
many reddit users came up with various theories eventually a speech expert got in touch with the
reddit user and the speech expert determined it would be impossible for the woman herself
to have made the noise meaning that someone else was in the room with her making the noise
ultimately the woman moved house because she was so scared now let's listen to another very scary
sound which is known as boots boots is a famous navy seal torture simulation navy seals are the
most elite group of the us military navy seals have incredibly grueling training but there's
one part of navy seal training that even the most tough navy seal fears this is known as
seer training this is where you're trained what to do if you're captured and what to do
if you're tortured during this navy seals have to listen to this very scary torture simulation audio
there's no discharge in the world crying try try try to think of something different oh my god the
sound is scary but it's even scarier how the seals have to listen to this they are in a cramped dark
room and have to listen to this tape for four to six hours only the toughest make it out and that's
why the navy seals are so elite some even say that this training exercise is too realistic and scary
and many navy seals who listen to this after their training have ptsd it really makes you wonder what
effect these sounds have on the human brain now let's take a look at another sound created by the
us military but i have to warn you it's illegal to play this sound this sound is said to give
people the worst anxiety possible they are known as eas signals this stands for emergency alert
system it's basically what electronics will play in the event of a nuclear war but many
people have had fines for playing these sounds this is to prevent false activations because if
one device hears this sound then other devices may start playing it and also the government
don't want the public to become desensitized to these announcements otherwise if it's played for
real people might think it's a joke or part of a movie the 2013 film olympus has fallen was fined
1.9 million dollars for playing these sounds but i will play a small portion of these sounds for you
this is the national test of the emergency alert system this is only a test broadcast
and cable operators in your area have developed this system in voluntary cooperation with fema
fcc and local authorities different countries have different eas alarms and they're all very scary
civil defense in the eastern province has sounded the danger alarm siren
please proceed as follows put on your gas mask stay in a safe place
recently these have been sounding all over ukraine because of the current conflict
eas signals can be dangerous in the wrong hands but did you know there's a sound so dangerous that
listening to it can end your life you may not believe sound can kill you but it can
the european space agency has what's known as a sonic weapon this is a weapon that can make
a sound so loud it can end your life the gigantic horn you can see here is found in the netherlands
it was not made for killing humans but instead for testing satellites the noise of this horn
emulates a rocket launch but even louder the horn can produce a sound of over 154db
this is not only enough to burst your eardrum but it's also loud enough to cause an air
embolism in your lungs this is basically a bubble of air that gets stuck in your lungs
this then travels to your heart and kills you in some cases your lungs may simply burst from
increased air pressure that's because the loud sound creates a massive amount of air pressure
of course i can't play how loud this sound really is your speakers would simply blow out
plus i wouldn't want to kill you but i can play a toned down version of what this horn sounds like
that is one of the scariest sounds in the world but what about scary sounds that
aren't from our world did you know that in 1969 the apollo 10 astronauts heard
music in space although this was recorded all the way back in 1969 it was not released at the time
as they did not want to panic the public but in 2016 this tape was quietly released
this is what the apollo 10 astronauts heard as they were orbiting the moon
that music even sounds outer spacey didn't it you hear that that whistling sound
yeah it sounds like uh you know outer space type music
hey tom is your is your installation all burned
off here on the front side of your window over here right there yeah
mine's all burned off heading out here where are you john it really does sound like music
the astronauts were very confused as to what they heard the weird music was heard for about one hour
before it disappeared i think the most mysterious part about this is that nasa chose to cover this
up if it was nothing why would they not simply release it do you think this was a sign of alien
life or something trying to contact the apollo 10 astronauts i think the only place more mysterious
than space is our own deep sea remember 95 percent of the world's oceans are not explored and
we really don't know what's down there in 1997 scientists were using deep sea microphones to
capture sound off the coast of south america but what they heard baffled these scientists
they said it was not made by a volcano or a whale these scientists nicknamed this the bloop
some speculate that this is an unidentified sea creature or monster while others say it
may be ice sheets cracking under the ocean but really to this day we still don't know
what was behind the bloop now let's go back in time and listen to one of the oldest
scariest sounds of all time this is actually the oldest recording of a human voice
what you're about to hear is edward leon scott recording himself he did this in 1860 using
his own invention the phone autograph this was one of the first ways to record sound
it's an amazing piece of history but also absolutely terrifying finally let's look at
one more scary sound from outer space this is what it sounds like on the planet saturn
it was recorded in 2002 by the cassini spacecraft and the sound is nicknamed saturn's screams
the frequency was so high they had to turn it down so human ears could hear it
i think it's safe to say we should avoid saturn at all costs i'm not against colonizing mars but
if we ever colonize saturn i won't be going just imagine having to hear these scary screams all day
and all night but now it's time for you to make your voice heard comment below which
sound do you think was the scariest if you want to see my short videos then check out my second
channel but as always thanks for watching i've been Charlie leave a like if you enjoyed
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