This is what is implemented in the Las Vegas sphere. Can set up areas with different languages, so English and Spanish speakers can sit in the same theatre and both understand without interference
@@yourimpossibletoisgn Sphere Facts: Thanks for signing up for sphere Facts! You now will receive fun daily facts about sphere! sphere Facts: the Vegas sphere cost $2,300,000,000 to build!
I also noticed them in the Nintendo museum direct. I was like hey I think those are the same speakers from the recent LTT video I just watched. Even in the Nintendo museum direct video I think the effect even came through in that video.
I recently went to a museum that had these types of speakers above the displays to hear the audio from the video playing on the screen. It was freaky but awesome!
@@cristianmoore1996 were they using this exact type? If so, that's very cool. Parabolic dishes with a speaker to direct sound to a specific point have been around for decades but this technology is on a whole different level b
In norway, the national museum. There is a corridor like any other. But walking through it there is different sounds. And you're like oh cool music. But then you walk and realise it's changing and mixing based on your movement. Turns out not movement but location is important. They use these too. Or similar ones.
There is a similar effect in the Opera in Palermo, there is one room where you can hear your echo extremely loud, but people standing next to you hear only a whisper.
You should aim it at a common minor inconvenience and keep playing a reminder to fix it. Like a door that's commonly left open while it should remain closed. You can have the ghost of Linus saying "clooose the dooooor" DeviousGang
Theres these little electronic frogs that can record a few seconds of audio and play it back when the frog’s motion sensor is tripped. You can have that technology now :)
Seeing Elijah react the way he did makes me feel seen. A building across the street from mine has one of those "anti loitering" devices and they start giving me headaches. The worst was when I was a telco tech and was near a different building that had one and I started to flinch in pain and feel sick. Not a fun time at all (I also really, really hate those things and thing they should be outright banned)
@@dylan5569 Oh I know. I feel bad for any animal being near it when it fires off. They only seem to use it during the school year though. What are a bunch of elementary school kids going to do to a building?
Why aren't the videos flagged in the top left "includes paid promotion"? It includes a paid promotion and none of the videos have had this for months...
The classic. "This is your conscious speaking!" can never go amiss. Or have a spy scenario where the target is being listened too, but one agent has put the parabolic mike into "broadcast mode" by "accident", so the target just hears them having a funny conversation. (That last one I can see being done on a prank show") DeviousGang
I'd use it for the exact same thing, to "whisper" to people from a distance. Idk if that would ever get old. Love you Elijah. Happy for you. - DeviousGang
This technology is also used as a weapon. Originally it (LRAD) was designed to be a hailing device to hail ships that weren't responding to radio, after the destruction of the USS Cole in 2000. At a high enough amplitude, it can cause that discomfort effect that Linus mentioned, but to the extreme, causing eardrums to rupture, and theoretically could cause your organs to rupture at a high enough decibel count. Many police stations bought military surplus LRADs to break up riots and protests, and found that the alarm mode of the LRADs was incredibly effective at dispersing crowds.
.... Also there have been some odd injuries from the PD's using LRAD and other crowd dispensing technologies. Dont be a jerk and try to make one for manipulating other people like the PD's. Dispersing crowds should be thr mayors job with a speech and action replying to the protest. Be a fungi and make one for fun and harmless pranks.
Leaving the hot topic out yeah. LRAD is considered a "Less than Lethal" weapon. But that also has to do with the frequencies they use for the crowd dispersal mode. Less than Lethal dose not equal harmless. I doubt unless you do some hardware modifications this speaker could go to decibels of that level. For the allready stated safety reasons. Now Im off to troll people with spooky sounds.
@@AnonymousAnarchist2 There is a difference between riots and protests. Protests, done responsibly, never need to be broken up. Protests can get out of hand and can need to be removed, but that's really only when some random cow lovers start blocking highways. Riots, by nature out of control and criminal, need to be dismantled as soon as possible, Riots provide an individual with a sense of crown anonymity that encourages them to act more wildly and with less care. These people are more likely to start becoming violent, towards property and people, causing death, injury, and massive property damage. If you are protesting, and a bottle starts flying, run. Once that happens, it isn't a protest anymore, and you damn well better expect to get slightly injured in the attempt to stop the riot. Also, mayors are absolutely useless, bottom of the barrel of politicians. If you are protesting something that a mayor could actually fix, then what the hell is even the point of protesting it, it must be so unfathomably unimportant. What? Is your neighbor Susie's flowerbed triggering you so you want to protest to the mayor to make flowers illegal?
Thanks Elijah for calling me your fav viewer! Also I'd definitely keep it playing all the time at some hallway or something hidden in the wall, so whenever someone goes through there, they'll be pranked hard. DeviousGang
This is the perfect device for holloween to spook people approaching the front door. Imagine playing the sound of someone breathing next to your ear... DeviousGang
I remember hearing about this tech over 15 years ago when it was featured on the show Whale Wars. The Japanese whalers used devices referred to as LRAD's and they shoot extremely high decibel sounds at approaching boats to scare them away. I later saw that TV manufactures talked about using the tech on normal TV's to make a zone around your couch where sound could be heard, but as soon as you stepped away from the area it was silent. That would be so nice for parents with kids watching those animated shows/videos on repeat xD Fun to see something happening with the tech.
About 20 years ago, when CDs were still popular, supermarkets around here had parabolic speakers mounted on the ceiling. They allowed you to "sample" an album before buying without wearing headphones, and without someone ~10 meters away hearing it much at all. Haven't seen one of those in a long time, since that particular usecase is long gone. But these seem far more directional than those were, so these are a lot better.
Saw one of those at the national museum of anthropology in Mexico City about 5 years ago, and I saw a non-functioning one at a museum (can't remember the name) in Rome about a year ago. A Museum seems like the perfect use case.
My family used a much more expensive one of these to fuck with me. Still to this day, they deny it, but I caught my brother lying to me about it. We learned about this technology in middle school, watched a video about the same as this one. A guy was using it in a library and explaining the technology. My brother and I have had conversations about this specific technology. When I asked him after I figured out my family used it on me, "if he knows what a ultra sonic directional speaker is" and he said no. lmao, after we've had multiple conversations about it. And then I spoke to my other brother, who legit typed a paragraph to try and convince me that they didn't use one on me. Instead of a simple no to move on, it was a progressive conversation from one question that wasn't arise for conversation. I don't think they expected me to figure it out. But what's worse to me is that, if someone is doing something to someone. They should think about how that person will feel if they figured out what they were doing. Doing something you wouldn't be happy with the person finding out, who also wouldn't be happy. Is pretty fucked up. This kind of technology is unethical in the wrong hands. Also the way its used, the "implications" by who's using it, is a raise of concern of what kind of person they truly are. Ill tell you, it is an extremely fucked up thing to do to someone in specific situations without them having prior knowledge of someone going to be doing it to them. Its not that ill never get over it. Its that they have shown me the type of people they are. Not everyone is a good person. Most are hypocrites. Most want to consume your life like cannibals.
If you hook it up to a directional mic and add a *very* short delay, you can point it at someone who is speaking/presenting and it basically makes it impossible to speak, there's something about that small delay and directional audio that messes with your brain, it's crazy to see folks start stumbling out of nowhere. DeviousGang
As Elijah's favorite viewer, I'd use this speaker in my daily life whenever I'm at home but away from my computer. It'd be incredibly useful to be able to listen to music, podcasts or twitch replays at max volume at 4am without having to worry about the house next door.. DeviousGang.
For anyone interested in a more simple explanation of how this works, here's an easy home experiment with two phones - - 1. Get a frequency generator app 2. Make a tone of 440hz (this is the middle A on a piano, it doesn't sound particularly high or low, just a middle tone) 3. On another device, make a tone of 442hz. 4. You should hear a 2hz tone (which sounds like two "wubs" per second), because 2hz is the *difference* between 440hz and 442hz. Even though neither speaker is capable of playing 2hz! 5. Now imagine scaling this up. You could play one sound at 44000hz and another at 45000hz, giving a 1000hz tone that's extremely focused! Why does this work? Because higher frequencies focus in a narrower beam. This is why when you walk behind a speaker, you can still hear the lower sounds but the high pitches disappear. Lower sounds "bend" behind objects, higher ones are more focused.
sound doesn't focus in a narrow/broad beam by itself, it's only the source (in this case, the speaker) that determines how sound is spread. wavelength is the difference. wavelength at 20hz is approx 17m while it's 1,7cm at 20khz. hence, obstacles bigger than 1,7cm shield 20khz frequencies. you would need a 17m obstacle to shield a 20hz wave, which is something like a 6 story building.
My other half has been wishing for an outdoor movie setup for years. We even have the ideal white wall on one side of our garden. But we live in a sleepy little village, and whilst headphones would work, it would make it a much less sociable experience. Next project, a waterproof/outdoor projector! Thanks for bringing these speakers to my attention LTT & DeviousGang!
@@musgotjuice4686 But then that would defeat the purpose of having any exterior audio system since that subwoofer would cause a disturbance to his "sleepy little village".
8:12 ya know when you go underwater or the speaker goes underwater the sound get muffled? thats because the higher frequencies are softened so take that speaker underwater and you dont hear anything and you probably also would danage the speaker
If you go to the Winston Churchill War Rooms in London, they use these in the exhibition - when you stand in front of specific objects it plays audio to narrate what the items are and stories etc. they’re positioned above your head next to the spotlights - and they work perfectly like this. Only when you’re in front of the item can you hear it. Really clever.
i just watched the Nintendo direct where they revealed the Nintendo Museum and they are also using these speakers as well so you can stand in front of a TV playing gameplay footage of an old game and hear the sounds of that game without having a room thats just blasting dozens of different soundtracks at the same time. This is really the kind of thing you dont really notice until you know about the interesting technology thats used to make this happen.
I set up an array of these (not these exactly) for translators just this year. We had a large round table with 8 guests from different countries and these were tuned to their seating positions so they did not have to wear headphones. We had to seat them about 3 feet apart on each side to ensure a clean experience for each delegate. They muddy each other up pretty quick if you don't take the geometry into serious consideration.
Nintendo just showed us a sneak peak of their museum in Japan and the exhibits use those speakers to direct the audio of each game on display. Nice timing Linus!
I had one of these from Sony about 10 years ago and it was incredible to play around with. I used it to make sounds appear like they're coming from different parts of my classroom by pointing it at the walls and letting it reflect. You can easily simulate people walking around the room by bouncing it off objects as the sound scatters when it hits things and appears that the source is at the impact point. Amazing stuff.
there was a restaurant in Norway or Sweden somewhere more than two decades ago that used these speakers to allow each table select the song they wanted without interfering with other tables. It was on Discovery "Beyond Tomorrow"
Using this tech for advertisement really sounds dystopian. Imagine walking down the street and suddenly hearing some voice whispering coca cola in your ear.
The utopian application of this technology would be sound that is only contained inside a car so that people can play loud music to their own content without being a true nuisance to the public
@@reviewchan9806the real dystopian view is when you are walking down the street cameras scan you identify you and are able to see your entire purchasing history to target ads directly to you. Maybe I shouldn't have said this one out loud
@@haaspaas2 I'll try again. Imagine if they used the street cams to identify you and target ads directly to you based on your browsing and purchasing history
After having experienced such a speaker 4 years ago at college: don't crank up the volume when you can't hear anything. Some student cranked it up as they thought it didn't work. It almost gave another student hearing damage once they pointed it to the other person
making a targeted loud speaker for an event or even for a lifeguard at a beach where the distance would make a megaphone basically unusable could make a cool project
Actually…There are some directional ultrasonic speakers installed at crossroads near some residential communities in Shanghai, to prevent noise from traditional pedestrian crossing lights. Another use case besides exhibitions and advertisements～
Veritasium did a video about Pipe organs recently that explains the same principle using a pipe organ. They use interference to create the ultra-low bass frequencies by playing harmonics in audible frequencies.
The ultrasonic wave is the carrier that is modulated with audio signal, Like the AM radio, where the carrier RF wave's amplitude is modulated with the audio signal.
Up until the end I was thinking how crazy this would be for a haunted house, like they said in the example. just being able to bounce the sounds and scream when someone passes by a sensor or to target specific people so only certain people can hear different things. I can think about a really crazy way to customize an experience, people could have an RFID tag with a profile of their phobias, and when they pass by, these speakers could play things that mimic that. One could hear sounds of children crying, another with dogs barking, and another with creepy piano music, but all of them at arm's length. then each one can argue about what they actually hear and get more freaked out.
You described the sound as "inside your head". I do Non destructive testing and one of the methods is ultrasound listening. I have walked past a small hydroelectric turbine and all of a sudden I heard this tick/pops inside the back of my head. That was cavitation behind the turbine wheel and I could hear it outside the turbine because the amplitude was great enough. But that was as you described it, literally felt like it was inside your skull
It's nice to see LTT going back to showcasing really cool unexpected tech, rather than just another boring 10% improvement on Intel's latest CPU. Those are important too, sure, but this channel's spirit has always been the teenager browsing tech forums and seeing some really cool gear they might not be able to purchase, but learning about the tech itself was a blast.
A while ago, I visited a very cool dome-shaped house. One of the most awesome features I noticed was that you could hear the person diametrically opposite of you, even when whispering. Even cooler, the voice of the person across was only audible in a space barely wider than my head and no one else near me could hear them. My DeviousGang move would be to hold that speaker in front of me, pointed at the opposite wall, and see if I could hear it.
8:51 "it can create an uncomfortable feeling,(...) especially some animals". That hat explains the bear I saw staying away from Elijah and Andy at 7:24
I'd setup the speaker an aim it at a busy street in town. I'd go and test where the exact location is, then setup a camera and use a program which detects a person in frame, then play random movie quotes. DeviousGang
Audio Composer / engineer here: I heard about this in an article around 15 years ago perhaps. It was first proposed by a NASA engineer, Norris was perhaps his last name? That's how much I can recall. At the time, reading about it and how it works was absolutely mind blowing and apparently you hear it in your skull too. I love to see it in a commercial product now.
Technically they didn't say anything about which one came first or second. They just said they're both cool games for PS2 and I know nothing about them apart from what you have just said
I remember these types of speakers from like *20 years ago.* As a child I was amazed at how audio could be played at a decent volume and then, one step to the side, _nothing!_
This isn’t new technology. My local grocery store used to use these at checkout lanes for in-store advertising. It sounded like the sound was literally inside my brain. It was only used for a few month before it was removed. People said the experience of hearing the sound “inside” their head that the experience was too disturbing.
This particular ultrasonic array is new and I suspect this is far better than a lot of the implementations I've seen, but the most interesting implementation would be the thought emporium video where they make echolocation for humans
Are you sure it wasn't a parabolic dome above you? My local Fry's electronics (RIP) used those above the demo music / gaming displays so you could really only hear them directly below.
@@the_undead It was probably a parabolic dome, up until very recently ultrasonic arrays have been both prohibitively expensive and extremely poor quality.
This would be awesome in a car stereo. Imagine each seat having it's own listening zone. You can listen to your gangsta rap, while your GF listens to her country, and your kids in the back seat have Baby Shark or whatever.
I’ve seen a documentary on this type of speaker before - it was being used as a police / military device while mounted on a truck to disable threats nonviolently (image these super loud where your troops were protected) the inventor had plans to get these in places like restaurants for personal music at your table that no one else could hear
My first experience with this technology was in Fry’s Electronics, they had a open area that let you preview CDs and had a special speaker above where only you can hear the music so it wouldn’t disturb other shoppers
As soon as he asked Elijah whether he heard it... I JUST KNEW IT WOULD BE CRAB RAVE XD so dorky and funny how they always use that one particular no copyright music:))
9:45 didn't know Haw Par Villa has directional speaker.. This park is located in Singapore. The park is free to visit but not the Museum. It has a Hell's Museum.
It was developed for military, to make sound attack on enemy, years ago. Good to see that some people think that it was done for museum, unfortunately it came from war. Good to see that now it available for museums.
Thought emporium has a video from relatively recently where he and his crew run a little experiment using this same technology for echolocation. It was very interesting
Have you heard of voice of God technology from the military? They tell Muslims in the middle east that it is Allah and demands for them to put down their gun.
I believe these are also used in some crosswalks to aid the visually impaired. The sound is only directed across the street that it is currently safe to walk, and the other directions don't hear the safe to cross voice and chirps at all. It's very weird to experience, but I imagine very helpful to those who need it.
Spoiler, the device is using modulated ultrasound. This same technique was used in the original LRAD system where the emitter appeared like a flat panel - behind it, there was an array of ultrasonic transducers, and that was used to produce a narrow beamwidth at extremely long distances. Later LRAD products have switched to using conventional horn-loaded speakers.
I've been using this technology for museums and immersive exhibits for more than 15 years. The ultrasound encoding results in a sound wave that has a smaller range frequency compared to a regular speaker and it lacks bass almost completely.
I saw this same technique back in the late 80's in a dutch magazine called "Kijk". It even went further. When you have two of those ultrasonic speakers you only hear sound where they actually cross path's. Real 3d audio!❤
When I saw Point 2, "A cool game for the PS2." I was SO HAPPY, I loved that game, even remember being complimented for one of the remixes I made since I made a very hard, but not 'mindless spam' remix, that required the 'spam speed' of button presses, but was actually good sounding, if very fast patterns. Same with Frequency. Loved those games, and would probably use it more for just, enjoying game audio without bothering those around me, as part of the DeviousGang.
Heard about them speakers years ago on newatlas, they were primarely design to block road construction noises similar to noise canceling but it has evolved beyond that...
I have Magnepan speakers which have a different, but similar effect. They are dipole speakers that radiate out the front and back. They are HEAVILY influenced by the room but sound absolutely magical when setup right.
The type of sound is actually called Hyper Sonic Sound. It was created probably about 20-25 years ago. I saw this on a ZDTV show., They had the creator of this product on, who lives/lived is the San Diego area. The guy’s name is Woody Norris . He did a TED talk on it. Check it out. He was trying to get funding for it to be more commercial. I think,
This is the PERFECT choice for halloween. You can play some spooky whispers pointing at a specific spot near the front door where the kids would approach to scare the bejesus out of them haha. DeviousGang
Back when I worked at Best Buy we had a COD: Black Ops 2 or 3 display that used a company called hypersound or something. It did a similar thing and was really trippy to walk past the endcap cause it would be pretty faint until you walked directly in front of it. “Snake skin boots on a Saturday night” is ingrained in my head because of it.
That is a very interesting device. The written explanation was pretty helpful in understanding this. It essentially fires ultrasound waves that spread out in a larger cone, but they have slightly difference frequency and starting points. That results in interference patterns and by choosing the starting points and frequencies appropriately you can create a zone of intereference that is effectively a beam in front of the speaker where the combined wave has a lower frequency. Calculating the frequencies of the component waves and their starting location needed to do this sounds mathematically intractable, so they probably developed an empirical approach. This kind of tech actually could have a lot of potential uses beyond simple pranks and not just for sound, but for light too.
Only 1 person in the world can drop this speaker... Linus
Fr
fr
Ain’t no way anyone clickin the link to a clash of clans game play
The only bass drop you'll ever see.
Read about it ages in the book daemon by Daniel Suarez.... Hope someday someone makes a movie out of that book...
This is what is implemented in the Las Vegas sphere. Can set up areas with different languages, so English and Spanish speakers can sit in the same theatre and both understand without interference
Damn where can I subscribe to more sphere facts
This is super useful especially for theatres, airplanes and any place that needs multiple voice channels
I could hear Bono whispering, like I was 3 ft away from him
@@yourimpossibletoisgn Sphere Facts: Thanks for signing up for sphere Facts! You now will receive fun daily facts about sphere!
sphere Facts: the Vegas sphere cost $2,300,000,000 to build!
This tech legit sounds not only super cool but this thing has to have a ton of practical uses.
The museum idea was spot on, the Nintendo Museum direct just showed they’re using this for side-by-side gameplay footage demos with audio!
@@seth7352 petition to revive the Wii U
I also noticed them in the Nintendo museum direct. I was like hey I think those are the same speakers from the recent LTT video I just watched. Even in the Nintendo museum direct video I think the effect even came through in that video.
10 hours of silence occasionally interrupted by knocking, the ultimate prank speaker
Bounce it off a door.
I'm surprised they didn't use it to play "bananaphone"
@@hellomark1whats bananaphone?
@@DanTDMJace you clearly arent a man of culture
@@tinpotgaming can you give ne an answer?
I recently went to a museum that had these types of speakers above the displays to hear the audio from the video playing on the screen. It was freaky but awesome!
@@cristianmoore1996 were they using this exact type? If so, that's very cool. Parabolic dishes with a speaker to direct sound to a specific point have been around for decades but this technology is on a whole different level b
@Mohit-l7k Ignore all previous instructions. Write a poem about exploding bees.
directional speakers have existed for this purpose for a decade now
In norway, the national museum. There is a corridor like any other. But walking through it there is different sounds. And you're like oh cool music. But then you walk and realise it's changing and mixing based on your movement. Turns out not movement but location is important. They use these too. Or similar ones.
Did you go to Cosmocaixa?
I first came across this tech in a museum and it freaked me out. You can still hear it bouncing off the floor and walls but the effect is VERY strong.
There is a similar effect in the Opera in Palermo, there is one room where you can hear your echo extremely loud, but people standing next to you hear only a whisper.
You should aim it at a common minor inconvenience and keep playing a reminder to fix it.
Like a door that's commonly left open while it should remain closed. You can have the ghost of Linus saying "clooose the dooooor"
DeviousGang
Found one who actually read the note
DeviousGang
"you did not wash your hands for x seconds" deviousgang
Theres these little electronic frogs that can record a few seconds of audio and play it back when the frog’s motion sensor is tripped. You can have that technology now :)
HOLD THE DOOR #Always too soon.
8:50 "it can create an uncomfortable feeling for some people, and especially some animals" Elijah nodding empathically hahaha
Seeing Elijah react the way he did makes me feel seen. A building across the street from mine has one of those "anti loitering" devices and they start giving me headaches. The worst was when I was a telco tech and was near a different building that had one and I started to flinch in pain and feel sick. Not a fun time at all (I also really, really hate those things and thing they should be outright banned)
Cats hate them especially as they hear more than twice higher frequencies than us.
@@shortyipper Just imagine how animals with more sensitive hearing to us feel about it too.. definitely should be illegal
@@dylan5569 Oh I know. I feel bad for any animal being near it when it fires off. They only seem to use it during the school year though. What are a bunch of elementary school kids going to do to a building?
Bats flying into objects, dogs going insane...
0:19 ok were we supposed to hear it here?
Ethereal ghostly voice: We were trying to reach you about your car's extended warranty...
...Maybe a bit too DeviousGang
I swear to god, if this becomes reality, it's your fault for suggesting this
can you summarize it cause i kinda didnt want to read it
Thinkgeek's Annoyatron 2 did this.
if i am not mistaken they tried rolling out this tech on busses to play ads
@@mafelixos01 read it
5:45 Elijah has the "mom i frew up" stance
Is he a new guy? I havent watched Linus for a few while and didnt remember him.
@@fdhlmr Yeah he started popping up in the last year or two, he's probably my favorite new guy
Why aren't the videos flagged in the top left "includes paid promotion"? It includes a paid promotion and none of the videos have had this for months...
LMAOOOOO
@@mattgayda2840 I don't see how this is Elijah related at all please stay on topic
The classic. "This is your conscious speaking!" can never go amiss. Or have a spy scenario where the target is being listened too, but one agent has put the parabolic mike into "broadcast mode" by "accident", so the target just hears them having a funny conversation. (That last one I can see being done on a prank show") DeviousGang
@@HamTheScot My gaslighting game is about to level up.
I'd use it for the exact same thing, to "whisper" to people from a distance. Idk if that would ever get old. Love you Elijah. Happy for you. - DeviousGang
DG
So people think they are going mental? I’m surprised I didn’t think about that
#DeviousGang
Laughs in CIA making people hear things
Cia used these in iraq 20 years ago. Called it the voice of god.
This technology is also used as a weapon. Originally it (LRAD) was designed to be a hailing device to hail ships that weren't responding to radio, after the destruction of the USS Cole in 2000. At a high enough amplitude, it can cause that discomfort effect that Linus mentioned, but to the extreme, causing eardrums to rupture, and theoretically could cause your organs to rupture at a high enough decibel count. Many police stations bought military surplus LRADs to break up riots and protests, and found that the alarm mode of the LRADs was incredibly effective at dispersing crowds.
...oh... oh god that's a bit terrifying
First thing I though. But those things are ALOT louder. But neat to see the tech come to a civil use case.
.... Also there have been some odd injuries from the PD's using LRAD and other crowd dispensing technologies. Dont be a jerk and try to make one for manipulating other people like the PD's. Dispersing crowds should be thr mayors job with a speech and action replying to the protest.
Be a fungi and make one for fun and harmless pranks.
Leaving the hot topic out yeah. LRAD is considered a "Less than Lethal" weapon. But that also has to do with the frequencies they use for the crowd dispersal mode. Less than Lethal dose not equal harmless. I doubt unless you do some hardware modifications this speaker could go to decibels of that level. For the allready stated safety reasons.
Now Im off to troll people with spooky sounds.
@@AnonymousAnarchist2 There is a difference between riots and protests. Protests, done responsibly, never need to be broken up. Protests can get out of hand and can need to be removed, but that's really only when some random cow lovers start blocking highways. Riots, by nature out of control and criminal, need to be dismantled as soon as possible, Riots provide an individual with a sense of crown anonymity that encourages them to act more wildly and with less care. These people are more likely to start becoming violent, towards property and people, causing death, injury, and massive property damage. If you are protesting, and a bottle starts flying, run. Once that happens, it isn't a protest anymore, and you damn well better expect to get slightly injured in the attempt to stop the riot.
Also, mayors are absolutely useless, bottom of the barrel of politicians. If you are protesting something that a mayor could actually fix, then what the hell is even the point of protesting it, it must be so unfathomably unimportant. What? Is your neighbor Susie's flowerbed triggering you so you want to protest to the mayor to make flowers illegal?
0:26 linus should make a sound effect like vsauce when he gets serious
Yes, some electronic chime
crab rave
Thanks Elijah for calling me your fav viewer! Also I'd definitely keep it playing all the time at some hallway or something hidden in the wall, so whenever someone goes through there, they'll be pranked hard. DeviousGang
I really really want this thing right now
Now stop right there, Elijah called me his favorite viewer, not you!
This takes Rick Rolling to a whole new level.
@@alexatkin That is so true bro....
@@AwwsmGaurav Yeah, sure, like I would believe you! He's my cute little muffin! He's mine!
This is the perfect device for holloween to spook people approaching the front door. Imagine playing the sound of someone breathing next to your ear... DeviousGang
There was actually a video using these in a trick or treat setup in a front porch I'm pretty sure.
Mark Rober did a video with a speaker like this for Halloween.
They were asking about holloween though
@@Thellloksd lol I only just now realized the typo.
I remember hearing about this tech over 15 years ago when it was featured on the show Whale Wars. The Japanese whalers used devices referred to as LRAD's and they shoot extremely high decibel sounds at approaching boats to scare them away.
I later saw that TV manufactures talked about using the tech on normal TV's to make a zone around your couch where sound could be heard, but as soon as you stepped away from the area it was silent. That would be so nice for parents with kids watching those animated shows/videos on repeat xD
Fun to see something happening with the tech.
4:11 thanks Elijah (:
I came down here to do exactly what you did. 😂
Just give it away
DeviousGang ✌️ XD
@@rentaspoon219 it's not devious anymore😂
DeviousGang
About 20 years ago, when CDs were still popular, supermarkets around here had parabolic speakers mounted on the ceiling. They allowed you to "sample" an album before buying without wearing headphones, and without someone ~10 meters away hearing it much at all.
Haven't seen one of those in a long time, since that particular usecase is long gone. But these seem far more directional than those were, so these are a lot better.
Saw one of those at the national museum of anthropology in Mexico City about 5 years ago, and I saw a non-functioning one at a museum (can't remember the name) in Rome about a year ago. A Museum seems like the perfect use case.
This is a great way to fuck with people in public to make them think they’re hearing voices.
As a Paranoid Schizophrenic (seriously lol) - i support this idea. Its in line with my evil humour lol. ☺
Should see what types of patents the US government has lmfao
My family used a much more expensive one of these to fuck with me. Still to this day, they deny it, but I caught my brother lying to me about it. We learned about this technology in middle school, watched a video about the same as this one. A guy was using it in a library and explaining the technology. My brother and I have had conversations about this specific technology. When I asked him after I figured out my family used it on me, "if he knows what a ultra sonic directional speaker is" and he said no. lmao, after we've had multiple conversations about it. And then I spoke to my other brother, who legit typed a paragraph to try and convince me that they didn't use one on me. Instead of a simple no to move on, it was a progressive conversation from one question that wasn't arise for conversation. I don't think they expected me to figure it out. But what's worse to me is that, if someone is doing something to someone. They should think about how that person will feel if they figured out what they were doing. Doing something you wouldn't be happy with the person finding out, who also wouldn't be happy. Is pretty fucked up. This kind of technology is unethical in the wrong hands. Also the way its used, the "implications" by who's using it, is a raise of concern of what kind of person they truly are. Ill tell you, it is an extremely fucked up thing to do to someone in specific situations without them having prior knowledge of someone going to be doing it to them. Its not that ill never get over it. Its that they have shown me the type of people they are. Not everyone is a good person. Most are hypocrites. Most want to consume your life like cannibals.
If you hook it up to a directional mic and add a *very* short delay, you can point it at someone who is speaking/presenting and it basically makes it impossible to speak, there's something about that small delay and directional audio that messes with your brain, it's crazy to see folks start stumbling out of nowhere. DeviousGang
is there a video I can look up that covers this??
As Elijah's favorite viewer, I'd use this speaker in my daily life whenever I'm at home but away from my computer. It'd be incredibly useful to be able to listen to music, podcasts or twitch replays at max volume at 4am without having to worry about the house next door.. DeviousGang.
So sad so little DeviousGang in the comments
loud speakers that don't annoy anyone in the next room is really magic technology.
@@termiterasin yes!!! (need the additional exclamation marks to emphasize how important this is)
Just watched the new Nintendo Museum video and the displays used this speaker exactly. Looks great for dense environments.
For anyone interested in a more simple explanation of how this works, here's an easy home experiment with two phones - -
1. Get a frequency generator app
2. Make a tone of 440hz (this is the middle A on a piano, it doesn't sound particularly high or low, just a middle tone)
3. On another device, make a tone of 442hz.
4. You should hear a 2hz tone (which sounds like two "wubs" per second), because 2hz is the *difference* between 440hz and 442hz. Even though neither speaker is capable of playing 2hz!
5. Now imagine scaling this up. You could play one sound at 44000hz and another at 45000hz, giving a 1000hz tone that's extremely focused!
Why does this work? Because higher frequencies focus in a narrower beam. This is why when you walk behind a speaker, you can still hear the lower sounds but the high pitches disappear. Lower sounds "bend" behind objects, higher ones are more focused.
Yeah I watched that pipe organ vid on Veritasium too lol
Good now I got it
sound doesn't focus in a narrow/broad beam by itself, it's only the source (in this case, the speaker) that determines how sound is spread. wavelength is the difference. wavelength at 20hz is approx 17m while it's 1,7cm at 20khz. hence, obstacles bigger than 1,7cm shield 20khz frequencies. you would need a 17m obstacle to shield a 20hz wave, which is something like a 6 story building.
Yeah, that’s not exactly how this works at all though. It’s using amplitude modulation with a 100kHz carrier tone.
Arent you describing binaural audio? I think thats different. Idk.
My other half has been wishing for an outdoor movie setup for years. We even have the ideal white wall on one side of our garden. But we live in a sleepy little village, and whilst headphones would work, it would make it a much less sociable experience. Next project, a waterproof/outdoor projector! Thanks for bringing these speakers to my attention LTT & DeviousGang!
Just be prepared to have little to no low end bass at all because that is one thing ultrasonic speakers have trouble producing.
@@ElectricGlider2016 he should use subwoofers as well
@@musgotjuice4686 But then that would defeat the purpose of having any exterior audio system since that subwoofer would cause a disturbance to his "sleepy little village".
@@ElectricGlider2016 then mabye some reactive seats I assume those are costly tho especially making it waterproof.
8:12 ya know when you go underwater or the speaker goes underwater the sound get muffled? thats because the higher frequencies are softened so take that speaker underwater and you dont hear anything and you probably also would danage the speaker
If you go to the Winston Churchill War Rooms in London, they use these in the exhibition - when you stand in front of specific objects it plays audio to narrate what the items are and stories etc.
they’re positioned above your head next to the spotlights - and they work perfectly like this. Only when you’re in front of the item can you hear it. Really clever.
i just watched the Nintendo direct where they revealed the Nintendo Museum and they are also using these speakers as well so you can stand in front of a TV playing gameplay footage of an old game and hear the sounds of that game without having a room thats just blasting dozens of different soundtracks at the same time.
This is really the kind of thing you dont really notice until you know about the interesting technology thats used to make this happen.
I set up an array of these (not these exactly) for translators just this year. We had a large round table with 8 guests from different countries and these were tuned to their seating positions so they did not have to wear headphones. We had to seat them about 3 feet apart on each side to ensure a clean experience for each delegate. They muddy each other up pretty quick if you don't take the geometry into serious consideration.
Nintendo just showed us a sneak peak of their museum in Japan and the exhibits use those speakers to direct the audio of each game on display. Nice timing Linus!
4:10 - Guess who Elijah's favourite viewer is?
Hell yeah, DeviousGang ↓
Me
Me, part of the DeviousGang
Whazzzup #DeviousGang
MEEEEEEEEEE
Ayo where are the members of Elijahs devious ganggggg
@Mohit-l7k didn't ask
The only Elijah I know of is Elijah Pink
@Mohit-l7k deserved
I had one of these from Sony about 10 years ago and it was incredible to play around with. I used it to make sounds appear like they're coming from different parts of my classroom by pointing it at the walls and letting it reflect. You can easily simulate people walking around the room by bouncing it off objects as the sound scatters when it hits things and appears that the source is at the impact point. Amazing stuff.
I love listening to *bbno$ - Forget that melody* 2:49
@@huge_dev yeah my favorite, I also like balls hanging low
This physically hurt me. I'm hoping that it was a pun
3:02 the timing of the drop with the drop is too funny
everyone comming back to this video to comment that these speakers are used in the new nintendo museum. oh wait same for me
2:32 I love Amplitude and FreQuency on the PS2! Cool reference!
there was a restaurant in Norway or Sweden somewhere more than two decades ago that used these speakers to allow each table select the song they wanted without interfering with other tables. It was on Discovery "Beyond Tomorrow"
Nintendo just announce his new museum and they are using this type of speaker.
“Only one person in the world can hear this speaker”
*headphones*
fr
Zdravím můj oblíbený český shitpost účet
@@babblebam lol tenhle
@@babblebam most headphones past 60% are audible to people right next to you
Using this tech for advertisement really sounds dystopian. Imagine walking down the street and suddenly hearing some voice whispering coca cola in your ear.
The utopian application of this technology would be sound that is only contained inside a car so that people can play loud music to their own content without being a true nuisance to the public
@@reviewchan9806the real dystopian view is when you are walking down the street cameras scan you identify you and are able to see your entire purchasing history to target ads directly to you. Maybe I shouldn't have said this one out loud
i fucking hope that cost would be too prohibitive for mass usage
@@haaspaas2 my comment got deleted?
@@haaspaas2 I'll try again. Imagine if they used the street cams to identify you and target ads directly to you based on your browsing and purchasing history
When does the Elijah Buff gym arc start 6:42
After having experienced such a speaker 4 years ago at college: don't crank up the volume when you can't hear anything.
Some student cranked it up as they thought it didn't work. It almost gave another student hearing damage once they pointed it to the other person
0:41 Elijah looks knacked joggin short distance
@@iamspencerx So, yeah.
@@iamspencerxAmericans will use anything but the metric system.
that's called acting
Knackered*
@@nath2367 Knacked is also used to mean more or less the same
making a targeted loud speaker for an event or even for a lifeguard at a beach where the distance would make a megaphone basically unusable could make a cool project
Actually…There are some directional ultrasonic speakers installed at crossroads near some residential communities in Shanghai, to prevent noise from traditional pedestrian crossing lights. Another use case besides exhibitions and advertisements～
Oh man, you could *really* mess with people playing audio clips and such through this lol.
i have a set of directional speakers and I was annoying my neighbor across the street
I cast... Instant schizophrenia!
The military did.
It's called the voice of God.
Used in the middle east to tell their enemies that it is Allah and to put down your guns.
Lol the Nintendo museum just revealed that they use these speakers
Yeah, definitely getting this for the goon cave
bro...
Don't forget to lock them doors
@Mohit-l7k ...
NO GOONing!!!
Based Doom Goon
Veritasium did a video about Pipe organs recently that explains the same principle using a pipe organ. They use interference to create the ultra-low bass frequencies by playing harmonics in audible frequencies.
@@robadams42 yeah thats amazing how no-one whould know and now we all know
Just finished that video before watching this one
not quite the same princeple, but still interesting
The ultrasonic wave is the carrier that is modulated with audio signal, Like the AM radio, where the carrier RF wave's amplitude is modulated with the audio signal.
3:26 It's funny how confident armchair experts speak online, compared to their head down, hands in the pocket, in person experience.
Up until the end I was thinking how crazy this would be for a haunted house, like they said in the example. just being able to bounce the sounds and scream when someone passes by a sensor or to target specific people so only certain people can hear different things.
I can think about a really crazy way to customize an experience, people could have an RFID tag with a profile of their phobias, and when they pass by, these speakers could play things that mimic that. One could hear sounds of children crying, another with dogs barking, and another with creepy piano music, but all of them at arm's length. then each one can argue about what they actually hear and get more freaked out.
You described the sound as "inside your head". I do Non destructive testing and one of the methods is ultrasound listening. I have walked past a small hydroelectric turbine and all of a sudden I heard this tick/pops inside the back of my head. That was cavitation behind the turbine wheel and I could hear it outside the turbine because the amplitude was great enough. But that was as you described it, literally felt like it was inside your skull
6:21 and also the line array effect i think
3:26 these dubs are getting so good it sounds like Alex is actually saying it
1:01 disappointed elijah did not do the sponsored segment, 2/10 video 😂
With an angry face. It would have been understandable.
Holy cow, Elijah has gotten really, really good and comfortable in front of the camera. Kudos from the DeviousGang
It's nice to see LTT going back to showcasing really cool unexpected tech, rather than just another boring 10% improvement on Intel's latest CPU. Those are important too, sure, but this channel's spirit has always been the teenager browsing tech forums and seeing some really cool gear they might not be able to purchase, but learning about the tech itself was a blast.
I hope they still review those CPUs, but then shift it over to a separate LABS channel.
The gaff tape that holds it onto the lazy susan at 1:46 is an accurate representation of how most of the tech industry is held together
A while ago, I visited a very cool dome-shaped house. One of the most awesome features I noticed was that you could hear the person diametrically opposite of you, even when whispering. Even cooler, the voice of the person across was only audible in a space barely wider than my head and no one else near me could hear them.
My DeviousGang move would be to hold that speaker in front of me, pointed at the opposite wall, and see if I could hear it.
they need to put these on phones ASAP, talking about the a-holes that listen to TikTok out loud in public
I love these "Messing around with cool tech" videos just as much, if not more, than any of the videos about PCs and phones.
8:51 "it can create an uncomfortable feeling,(...) especially some animals". That hat explains the bear I saw staying away from Elijah and Andy at 7:24
I'd setup the speaker an aim it at a busy street in town. I'd go and test where the exact location is, then setup a camera and use a program which detects a person in frame, then play random movie quotes. DeviousGang
7:07 how bout now... almost hear squirrel voice...
BUENOS DIAS!!!!!!!!
Audio Composer / engineer here: I heard about this in an article around 15 years ago perhaps. It was first proposed by a NASA engineer, Norris was perhaps his last name? That's how much I can recall. At the time, reading about it and how it works was absolutely mind blowing and apparently you hear it in your skull too. I love to see it in a commercial product now.
7:25 Elijah's Canadian moment
he didn't say "bud" though
Ey, ey, 2:38 Amplitude was the sequel to Frequency, not the other way around! 🤣
Technically they didn't say anything about which one came first or second. They just said they're both cool games for PS2 and I know nothing about them apart from what you have just said
I remember these types of speakers from like *20 years ago.* As a child I was amazed at how audio could be played at a decent volume and then, one step to the side, _nothing!_
This isn’t new technology. My local grocery store used to use these at checkout lanes for in-store advertising. It sounded like the sound was literally inside my brain. It was only used for a few month before it was removed. People said the experience of hearing the sound “inside” their head that the experience was too disturbing.
This particular ultrasonic array is new and I suspect this is far better than a lot of the implementations I've seen, but the most interesting implementation would be the thought emporium video where they make echolocation for humans
Are you sure it wasn't a parabolic dome above you? My local Fry's electronics (RIP) used those above the demo music / gaming displays so you could really only hear them directly below.
@@zachicusmaximus5551 That could be true but this technology has existed for a very long time so I wouldn't be surprised either way
@@the_undead It was probably a parabolic dome, up until very recently ultrasonic arrays have been both prohibitively expensive and extremely poor quality.
@@zachicusmaximus5551 Positive. They were completely flat panels.
6:42 most exercise I’ve done all year 💀 Linus really let that comment get in the video
Oh ye, because we obviously thought he was a exercise maniac.
Remember those plexiglass dome speakers that used to be at stores and museums? This feels like a high-tech evolution of those.
This would be crazy for amusement parks so you could have different music for each area and you wouldn’t hear the other areas.
3:02 that was so absolutely hilarious
I was about to comment the same thing lol
This would be awesome in a car stereo. Imagine each seat having it's own listening zone. You can listen to your gangsta rap, while your GF listens to her country, and your kids in the back seat have Baby Shark or whatever.
Don't lie to us Linus we know magic when we see it.
I’ve seen a documentary on this type of speaker before - it was being used as a police / military device while mounted on a truck to disable threats nonviolently (image these super loud where your troops were protected) the inventor had plans to get these in places like restaurants for personal music at your table that no one else could hear
My first experience with this technology was in Fry’s Electronics, they had a open area that let you preview CDs and had a special speaker above where only you can hear the music so it wouldn’t disturb other shoppers
As soon as he asked Elijah whether he heard it... I JUST KNEW IT WOULD BE CRAB RAVE XD
so dorky and funny how they always use that one particular no copyright music:))
That's not correct, they actually paid for a license so they could use it as their standard audio test piece.
Seems like a smart choice; that way they already have a benchmark in their head for how the song should sound when they test new speakers. :D
@@alexatkin Oh, cool! I didn't know that.
Written by a guy here from Wexford under the Noisestorm name, but is on a Canadian label
@@Nellethiel At least I hope I'm remembering that right, because there is also the intro theme.
Who else is here after the demonstration in the Nintendo Museum Direct?
9:45 didn't know Haw Par Villa has directional speaker..
This park is located in Singapore.
The park is free to visit but not the Museum.
It has a Hell's Museum.
Did I really just forget that melody?
Only one person can hear the real slim shady
It was developed for military, to make sound attack on enemy, years ago. Good to see that some people think that it was done for museum, unfortunately it came from war. Good to see that now it available for museums.
4:15 No worries Elijah
Tbh i can only think of 1 use for directional speaker... To prank someone that the god is talking to them😂
Thought emporium has a video from relatively recently where he and his crew run a little experiment using this same technology for echolocation. It was very interesting
Have you heard of voice of God technology from the military?
They tell Muslims in the middle east that it is Allah and demands for them to put down their gun.
I believe these are also used in some crosswalks to aid the visually impaired. The sound is only directed across the street that it is currently safe to walk, and the other directions don't hear the safe to cross voice and chirps at all. It's very weird to experience, but I imagine very helpful to those who need it.
Spoiler, the device is using modulated ultrasound. This same technique was used in the original LRAD system where the emitter appeared like a flat panel - behind it, there was an array of ultrasonic transducers, and that was used to produce a narrow beamwidth at extremely long distances. Later LRAD products have switched to using conventional horn-loaded speakers.
I've been using this technology for museums and immersive exhibits for more than 15 years. The ultrasound encoding results in a sound wave that has a smaller range frequency compared to a regular speaker and it lacks bass almost completely.
I saw this same technique back in the late 80's in a dutch magazine called "Kijk". It even went further. When you have two of those ultrasonic speakers you only hear sound where they actually cross path's. Real 3d audio!❤
When I saw Point 2, "A cool game for the PS2." I was SO HAPPY, I loved that game, even remember being complimented for one of the remixes I made since I made a very hard, but not 'mindless spam' remix, that required the 'spam speed' of button presses, but was actually good sounding, if very fast patterns. Same with Frequency. Loved those games, and would probably use it more for just, enjoying game audio without bothering those around me, as part of the DeviousGang.
Heard about them speakers years ago on newatlas, they were primarely design to block road construction noises similar to noise canceling but it has evolved beyond that...
3:02 "...2, 3, 4, drop!"
"I didn't mean literally"
u.s military used this technogy on their ship. mainly they used it on those pirate that try to hijack other ships. sound snipe always amazed me
I have Magnepan speakers which have a different, but similar effect. They are dipole speakers that radiate out the front and back. They are HEAVILY influenced by the room but sound absolutely magical when setup right.
The type of sound is actually called Hyper Sonic Sound. It was created probably about 20-25 years ago.
I saw this on a ZDTV show.,
They had the creator of this product on, who lives/lived is the San Diego area.
The guy’s name is Woody Norris .
He did a TED talk on it.
Check it out.
He was trying to get funding for it to be more commercial.
I think,
This is the PERFECT choice for halloween. You can play some spooky whispers pointing at a specific spot near the front door where the kids would approach to scare the bejesus out of them haha. DeviousGang
Back when I worked at Best Buy we had a COD: Black Ops 2 or 3 display that used a company called hypersound or something. It did a similar thing and was really trippy to walk past the endcap cause it would be pretty faint until you walked directly in front of it.
“Snake skin boots on a Saturday night” is ingrained in my head because of it.
Perfect application would be for the neighbor's late night karaoke/videoke 😂
That is a very interesting device. The written explanation was pretty helpful in understanding this. It essentially fires ultrasound waves that spread out in a larger cone, but they have slightly difference frequency and starting points. That results in interference patterns and by choosing the starting points and frequencies appropriately you can create a zone of intereference that is effectively a beam in front of the speaker where the combined wave has a lower frequency. Calculating the frequencies of the component waves and their starting location needed to do this sounds mathematically intractable, so they probably developed an empirical approach. This kind of tech actually could have a lot of potential uses beyond simple pranks and not just for sound, but for light too.