Instructables

Mosquito sound that adults cant hear

I was at school the other day and I heard this annoying ringing sound. so I was looking around wondering what the hell it was when the teacher(who's probably 40 or 50)was like "what are you doing?" I said that I hear a ringing sound. then he said that I was crazy and there wasn't anything ringing. then the other classmates started listing and they all heard it also. I talked to that kid after class and was like where did you get that sound, and he replied its a ringtone. so when I got home I looked into it more and found out that people who are older supposevely cannot hear it so I played it for my mom and I was expecting her to hear nothing and then she was like "turn that annoying sound off right now". I was like wow........how did you hear it. everybody says she has super human hearing. here is the link to test it out. http://odeo.com/audio/1329298/view

Eden Derek1 year ago
Already got hearing loss. Unable to hear the sound frequency higher than 18KHz.
thing 22 years ago
Is there a new link?
Wow, it really works!
popa272724 years ago
i've heard of this its that sound that dane cook says makes you want to punch babies
my friend texted me that sound. i got so annoyed there were adults around everywhere and i was surprised that they didnt hear it but some of the kids heard it
My brother has that on his phone. He played it nonstop during dinner. When I said Cut that out right now! my parents thought I was crazy.
Ah yes, aren't brothers fun :-) Older brother ? The new improved electronic method of kicking one's brother in the shins under the table.....the new way doesn't leave a mark, and the parents don't even hear it LOL
Azn Hitman (author)  Goodhart6 years ago
im lucky enough that i dont have to deal with that!
Azn Hitman (author)  Spl1nt3rC3ll6 years ago
haha you should of just slapped him. ha jk
iBomber6 years ago
lol .. the teachers deaf.
Azn Hitman (author)  iBomber6 years ago
very............
Eh you're lucky a sick physics teacher started a torture system with me, basically this all started during the can you hear it? things you do, at about 22KHZ I was on the floor holding my head, I shouldn't be able to hear it but hey...
hahahaha thats horrible! what did you do to piss him off?
It was a she... I raised all hell in her class because she was a terrible teacher, I mean really bad at teaching.
oh, lol i know wjhat you mean. ive done the same. and of course the teacher made the mistake of saying "well, if im such a crappy teacher then you must be a better teacher! so why dont YOU teach this class and get them under control" and i did i switched out of that class the next week because i KNEW he was going to fail me.
Yeah, she tried that one on me, basically explain the hardest topic in the course badly and get the class to quetsion me for anwers, sadly for her I was too quick on my feet for that, she threw me out of class for really ridiculous reasons, one class I lasted exactly 11 seconds before she screamed I will not tolerate this insolence and told me to go away...
hahahahahahaha if im getting kicked out then i will be kicked out before the late bell rings. the teacher(Earth/environmental science) has all the notes in powerpoints on a flashdrive so i went to the store, bought the EXACT same one and switched them out one day and she was freaking out cus she had ~1.7 gigs of powerpoints.
lol nice one, what really would have put the icing on the cake was a folder shaped logo on a shortcut to a virus batch...
hahahahahahahahahaha i love that class though cus i "borrow" sooo much stuff from there. i have a new lamp, loads of beakers and other containers, bunsen burner, all kinds of stuff.
Azn Hitman (author)  ledzep5676 years ago
haha does your teacher notice at all?
no lol. as long as she doesnt see you out of your seat your fine. she is so ditsy
Azn Hitman (author)  ledzep5676 years ago
lol is she really old?
actually, she is only in her early 40's
Azn Hitman (author)  ledzep5676 years ago
lol ohhh i see i wish my science teacher wasnt as clueless
Hmm I did the same thing, I still have a big bag of magnesium ribbon on my desk, I once stole a jar of splints, assembled an effigy out of them (labeled clearly and lit it surrepticiously while leaving it as a teacher walked in the doors at the end of the room, I loved the buildings in the school, a mush of old, older and newish buildings left many places to disappear...
dont i know it, our school was built in 1940's. it still has the coal stacks and stuff. theres several hidden stairwells where they are sealed up(for the most part). in the weight conditioning room theres a crawl space in the roof and ofcourse theres a hole in the ceiling under one of the benches. thats where everyone stashes their drugs when the drug dogs come lol our school is 3 stories and the buildings are connected by a series of overpasses, fully caged in except for the 3rd story one. they sealed off both ends of it but if you have the testicular fortitude you can jump the rail on the ramp and shimmy about 10 feet across a fence and then your on the 3rd floor catwalk. the hard part is getting back... in the back of our science room(its also the chemistry room, well one of them atleast) and it has this emergency shower thing. there are a bunch of pipes on the wall that are made of a very thin metal material and theres a drain that goes tot he classroom below. so one day we had a substitute teacher and someone decided to throw a chain at the pipes and they busted,.... well, the class below flooded and the whole building evacuated for some reason... that class is so fun
Yeha due to the mixing of buildings theree some amazing tricks, from teh languages building I could get to the top of the massive wall that ran along the back of the school, from there I could gain access to almost anywhere in the buildings along that bit, it was great, one day started a plan to do this and by the next we had figured out how to get everywhere along there and even found several other ways up and down. After this we start exploring the massive hall for assemblies, an older building with seating for the whole school of two thousand, there were two big slots out of the ceiling about sixty feet up... once up there we found the most amazing things, old supplies and equipment had been stored up there for nearly a hundred years so stuff was insane. There were also power sockets and all and a giant TV so we now had a secret room to kill time... I always loved big old buildings for this, if I get rich I'll start buying them just for the sake of it.
hahahaha Id go around on the roofs of our school if they werent concaved(where the highest point is the middle and they are curved) aluminum. With all the moss and stuff I could only imagine being able to walk up there... Instead, i get my "parkour" fill from historic downtown. its only about 20 minutes away on foot. most of the buildings are being restored so theres scaffolding on everyother building and its just amazing to climb on the roofs and stuff. there are even a few old water towers on some of the roofs.
yeah I enjoy doing a bit of parkour from time to time, mainly because of the exploring and my abilities to find nice places to go... Then again I do the same thing on my bike too, he who dares wins, I have no qualms about riding along a wall or jumping over very silly things which at worst have been rivers and small alleys as I take my bike with when doing parkour, in town it doesn't leave my sight.
wow. I have never rode across anything skinnier then a sidewalk after i saw my friends compound fracture in his collarbone after he rode over a log and fell. his sleeve got caught on the handlebar so he couldn't put out his hand.
Eh I am amzing at crashing, not blowing my own horn or anything, but I've been in a 40mph crash on bicycle which involved going through a hedge and over a wall, all I had was a gash on my arm and scraped knees, I do ride with the lunacy only someone truly fearless or truly stupid can muster and it pays off for me, I have a bit of an adrenaline junkie problem which my cycling fulfills... I've fallen off a wall and it hurts, mainly because half the time one legs catches on it and you end up under the bike, which is a big problem in my book, I attempt to put some distance between me and the bike, especially since I have rather sharp metal pedals, most are but these are ridiculous, I nick threads out of my trousers all the time with them. Also getting a bike wrapped around your leg is painful, as is snapping the crankarm and slicing your leg ankle to knee... But it's all in the name of good fun and happiness.
hahahahaha wow, sounds like fun. I prefer mosh-pit injuries and Lacrosse injuries. And since im a member of the "thug" team (we lead the state in penalties, given injuries and about everything else bad...)(all but about 6 of our players are football players...)i have my fair share of injuries. but not major injuries that woukld put me out of the game, just minor ones that hurt but arent "disabilitating" in our last game against Laney, it was our cleanest game and one of our defenders broke his foot, a midi(on our team) suffered from a low(REALLY LOW) hit, anothe rmidi suffered a cuncussion(2 more and he cant play sports anymore) and 2 sticks were broken. and i got in in the 4th period(cus im a freshmen) and i inflicted a crosscheck(when you hit someone with your hands farther then 6 inches apart on your stick.) right in the throat on this guy cus he hit me late(after i passed the ball, like 5 seconds after...) so he was down for a while. hahaha im working on "borrowing" the model skeleton(its missing like 8 bones) bone by bone by sticking one bone at a time in my backback starting from the feet up and reconstructing it in my room . it should be a while before she notices
Lol I finally crashed yesterday, oopsy. I can be a fair ole thug too, in hockey the teacher used to always make me do demonstrations, so for a little revenge I alway did dirty tackles, I broke his ankle... Rugby was a similar story, the horns on my collarbone left anyone I tackled with a huge bruise in the middle of their sternums...
hahaha i would play rugby if i played football. and i havent played on a football team so i havent "learn to hit". and i figure if i wanted to play rugby id have to learn how to hit... and ive never ice skated before in my life so that rules out hockey. I was watching this show about "deadliest sprots" and they didnt even include Lacrosse in any of the tests. they tested hardest hitters(football was hardest but rugby had more hits so the average force from a rugby hit times the number of hits was almost the same as the force of a foorball hit times the average hits in football), longest sticks(hockey at 60 inches but a lacrosse defense stick can be 72 inches...)fastest ball thrown(it was baseball but should have been lacrosse, baseball goes at about 90 mph, lacrosse has been clocked at +120) the "deadliest sport" turned out to be cricket because the pitcher is allowed to hit the batter wherever he wants and get away with it... I was going to write them an angry letter but the procrastination/laziness kicked in lol
Ah football as in american football is a bit girly for me, think same force, no forward passing and none of them all body tampons for protection, about one in ten wear a small amont of padding to stop skin getting pinched and causing blood blisters etc. on the shoulders... I've had that notion myself, lacrosse is pretty insane but so is hurley, ever been hit with one of the bats? It's like being paddled and hit with a big heavy stick at the same time. I played hockey not ice hockey so meh, it was like the same abuse only less padding and astro-turf, hence how I bust up the teacher. yeah laziness...
well, according to the show the football hits had more force because there was no mental handicap. because a football player can do all sorts of things and not worry about getting hurt, whereas a rugby player can get hurt alot more easier. the force from a football hit is higher but its also dissapitated quickly so the person on the recieveing end feels less. but the rugby player feels it all lol. ive never heard of "hurley"
It's the irish equivalent to hockey, a kind of stick with and odd shaped paddle on the end is used to flick the ball up and bat it at simply ridiculous speeds, alot of americans buy ornamentally designed hurley bats to bring back with them after long winded speeches about how I must know their grandma's grandpa's cousin or bonno...
ohhhh, almost like field hockey? i know what your talking about now i think...
Yeah hurley's played on a field but the ball stays in the air alot... As my friend shouted while we were drunk one day 'Look they're playing quidditch!'
HAHAHAHAHAHAHA I imagine it would be dangerous...
get in the chat room!
Meh I'll try and get it to keep my attention,
Sounds like Johnny Cash's "One Piece at a Time" automobile LOL :

Well, I left Kentucky back in '49
An' went to Detroit workin' on a 'sembly line
The first year they had me puttin' wheels on Cadillacs

Every day I'd watch them beauties roll by
And sometimes I'd hang my head and cry
'Cause I always wanted me one that was long and black

One day I devised myself a plan
That should be the envy of most any man
I'd sneak it out of there in a lunch box in my hand

Now gettin' caught meant gettin' fired
But I figured I'd have it all by the time I retired
I'd have me a car worth at least a hundred grand

I'd get it one piece at a time and it wouldn't cost me a dime
You'll know it's me when I come through your town
I'm gonna ride around in style, I'm gonna drive everybody wild
'Cause I'll have the only one there is around

So the very next day when I punched in
With my big lunch box, with help from my friend
I left that day with a lunch box full of gears

I've never considered myself a thief
But GM wouldn't miss just one little piece
Especially if I strung it out over several years

The first day I got me a fuel pump
And the next day I got me an engine and a trunk
Then I got me a transmission and all of the chrome

The little things I could get in my big lunch box
Like nuts, an' bolts, and all four shocks
But the big stuff we snuck out in my buddy's mobile home.

Now up to now my plan went alright
'Til we tried to put it all together one night
And that's when we noticed that something was definitely wrong

The transmission was a '53
And the motor turned out to be a '73
And when we tried to put in the bolts all the holes were gone

So we drilled it out so that it would fit
And with a little bit of help with an A-daptor kit
We had that engine runnin' just like a song

Now the headlights they was another sight
We had two on the left and one on the right
But when we pulled out the switch all three of 'em come on

The back end looked kinda funny too
But we put it together and when we got through
Well, that's when we noticed that we only had one tail-fin

About that time my wife walked out
And I could see in her eyes that she had her doubts
But she opened the door and said, "Honey, take me for a spin"

So we drove up town just to get the tags
And I headed her right on down main drag
I could hear everybody laughin' for blocks around

But up there at the court house they didn't laugh
'Cause to type it up it took the whole staff
And when they got through the title weighed sixty pounds

I got it one piece at a time and it didn't cost me a dime
You'll know it's me when I come through your town
I'm gonna ride around in style, I'm gonna drive everybody wild
'Cause I'll have the only one there is around

Ugh! Yow, Red Ryder, this is the Cotton Mouth
In the Psycho-Billy Cadillac come on
Huh, this is the Cotton Mouth
And negatory on the cost of this mow-chine there, Red Ryder
You might say I went right up to the factory
And picked it up, it's cheaper that way
Ugh! What model is it?

Azn Hitman (author)  killerjackalope6 years ago
haha wow that sounds painfull. what did the other students say?
They were like WTF whats up with him...
Azn Hitman (author)  killerjackalope6 years ago
LOL that must of been fun
Oh just wonderful I can assure you...
Eaton6 years ago
I heard about this and blasted a 17KHZ Ogg file on my iPod (with rockbox), I thought I was going to die.
Azn Hitman (author)  Eaton6 years ago
lol yeah i felt the same way when the stupid kid in class did it!
... thats annoying...considering I can hear sounds at higher frequencies than most people.
Azn Hitman (author)  littlechef376 years ago
i know i makes my head hurt.
NachoMahma6 years ago
. I can hear it but have to turn the volume up quite a bit. I didn't find it annoying, at least for the 10 seconds that the clip lasts. BTW, I'm almost 52 yo.
Azn Hitman (author)  NachoMahma6 years ago
wow what kind of speakers are you using?
Kiteman6 years ago
As you age, your ability to hear higher frequencies of sound naturally deteriorates. This is natural and unavoidable, but accelerated by listening to loud music or working in noisy environments without adequate hearing protection.

This phenomenon has now been exploited commercially (in the UK at least) in a product called (coincidentally) Mosquito.

It is a loud-speaker system, installed in areas where unwelcome teens gather in packs and cause trouble. The loudspeakers broadcast the mosquito sound, causing enough irritation in teens that they move on and their pack breaks up. Older people cannot hear the noise, so carry on regardless.

There has been at least one case where the device has prompted claims that it contravenes humans rights (??)

Video news article
Opinion piece
"Calls to ban..."
Azn Hitman (author)  Kiteman6 years ago
thats where I heard of it...it was on the news or something and some guy made it to keep kids from loitering.
I have a copy of it on my computer. My wife can't hear it at all, and I only just "hear it", it gives me an increasingly throbbing headache to listen to it very long. If I up the volume and eliminate "bass" on the speakers, I have to leave the room or shut it off. I seem to have more troubles hearing lower frequency sounds than higher....but I am a tad odd anyways :-)
Goodhart6 years ago
even though I am nearly 50, I can just hear it. And it is VERY annoying to me, even though it is not overly loud. It gives me a headache. I have seen this before at other sites with the same result. But then, I am one of the few of my age that can still hear that high pitched squeal of disc brakes, and the sonic sensor in some elevators (used to "see" if anyone is still in the doorway).
Azn Hitman (author)  Goodhart6 years ago
lol yeah. my friends neighbor has it in their driveway to keep the birds away and it is soooooooo annoying and it hurts my teeth.
After about a minute or so, it feels like my head wants to implode, *sigh*
I still hear that awful whine when a tv it turned on (coming from the HV power supply, or flyback, or the picture tube itself.....it sounds like it is inside my head every time I hear it.
Azn Hitman (author)  Goodhart6 years ago
i know me to. i can hear if the tv is on from the other side of my house.
it is such a high pitched whine to me, I can't determine the direction of origin many times.....it sounds a lot like it is coming from inside my head...but when I look, or ask around, sure enough, I tv had been turned on somewhere in the vicinity.
Azn Hitman (author)  Goodhart6 years ago
yeah me to.
On these I can't hear any of them past 16kHz
Generally you stop hearing around a certain age, but there are always exceptions in science. She just happens to be able to still hear it.
Azn Hitman (author)  Weissensteinburg6 years ago
shes only 41
Do you know what the accepted age is for not being able to hear it?
I think I remember reading that "normally" those over 25-30 can not.
Azn Hitman (author)  Goodhart6 years ago
yeah i think its something like that also.
ledzep5676 years ago
lol i was waiting for this to make its way to instructables... yea, it sounds like a TV or something and was really popular at our school for a while until everyone started doing it. thankfully, i havent heard that noise for about a week now.
Azn Hitman (author)  ledzep5676 years ago
ya alot of people pay to get it on their phone.
CameronSS6 years ago
I did some quick-and-dirty tests a while back using the tone generator in Audacity...I can hear up to about 21kHz, but my sister's boyfriend could only hear up to around 14 kHz. However, my dad, who is ~~XX~~ old, could hear up to 15 kHz.
Azn Hitman (author)  CameronSS6 years ago
haha thats weird. maybe your sisters Boy Friend just listens to really loud misic so his hearing suffers.
Brennn106 years ago
One kid was doing it today in chemistry. My teacher, and an aid for a student were completely deaf to the sound.
Azn Hitman (author)  Brennn106 years ago
alot of people have that sound at my school. its really annoying when they play it, everybody gets mad.
guyfrom7up6 years ago
we did that during science and he was just getting annoyed, everyone was like "can you here it" and he's like "yes, now quit asking me!"
Azn Hitman (author)  guyfrom7up6 years ago
lol my science teacher must be like deaf because people like make phone calls during class lol