I Bought a Recording Jammer. It’s Legal.

Рет қаралды 1,341,411

Күн бұрын

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With this Ultrasonic Recording Jammer, Linus can finally speak his mind! Of course, he was already doing that..
Discuss on the forum: linustechtips.com/topic/15683...
Some light reading about ultrasonic jamming:
synrg.csl.illinois.edu/papers...
people.cs.uchicago.edu/~raven...
counterespionage.com/ultrason...
arxiv.org/pdf/1904.08490
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CHAPTERS
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0:00 Intro
1:20 Some Bold Claims
2:19 How does it work?
5:06 Surely AI will save us!
6:18 Poor little guy...
8:02 SPOILER ALERT!
9:12 All shapes and sizes
12:02 Is there anything a 58 can't do?
12:45 We joke because we love
13:52 Credits

Пікірлер: 2 500

@fanta6789 13 күн бұрын

Poor Elijah has to now wear both helmet and ear plugs.

@iliketodostuff123 13 күн бұрын

i feel that. i can hear stupid high frequencies.

@hirudasanguinen4073 13 күн бұрын

@@iliketodostuff123 with one ear i can hear the capacitors of my screen, the other i cannot

@junkheadINC 13 күн бұрын

Why would it be illegal?

@Biomancer81 13 күн бұрын

Nah, they sold the helmet.

@repatch43 13 күн бұрын

@@junkheadINChealth effects might be really bad. Just because you can’t hear it doesn’t mean it can’t hurt your ears

@kcrede 13 күн бұрын

Not “Jeffrey Epstein didn’t kill himself” lol lip reading was a little easy for that one

@greatestytcommentator 13 күн бұрын

You beat me to it!

@alexisbell8865 13 күн бұрын

right! XD lip reading skills too good tp know he saying

@Fishvap 13 күн бұрын

Where does he say that? At the beginning?

@jackinzbox. 13 күн бұрын

@@Fishvap0:43

@znhxnxzjx 13 күн бұрын

BRUH

@A.Achorn 13 күн бұрын

OMG I'm dying the Quebec joke with the editors note even throwing down a "Tabarnak" was icing on the cake thanks for keeping it Canadian!

@corrompu98 13 күн бұрын

They really dared. Tabarnak osti caliss 😠😆

@RagnarokLoW 13 күн бұрын

never heard a single canadian say tabarnak.

@ComradePhoenix 12 күн бұрын

As an American, I have no idea what the hell a Tabarnak is, but I strongly suspect the Quebec joke was done to fill in a canadian content quota.

@corrompu98 12 күн бұрын

@@ComradePhoenix it's a french canadian slang and not sure my english isn't perfect maybe someone can correct me, but I think you can say "damn" or "holy shit" to replace Tabarnak. In France they would rather use Putain or Putain de merde

@guillaume-labrie 12 күн бұрын

@@corrompu98 yeah that's the gist of it. Our swear words are pretty much all based on Christian church paraphernalia, so it doesn't translate well. We're essentially saying the name of the little cabinet they keep the host, the little white circles representing the body of Christ.

@donotworried 13 күн бұрын

Topic being interesting is one thing, but this video was really well produced as well! From cutting off the background music for punchlines, to well written dialogue/script. 11/10.

@watema3381 12 күн бұрын

Most definitely. One of their best yet.

@JMUDoc 13 күн бұрын

So it's a Hypno-toad.

@FlyingCIRCU175 13 күн бұрын

LTT Labs is a tabloid compared to Gamers Ne--ALL GLORY TO THE HYPNOTOAD

@manywhere 13 күн бұрын

Or sequel to Tenet? I prefer Hypnotoad episodes.

@that44rdv4rk 13 күн бұрын

ALL GLORY TO THE HYPNOTOAD

@lurtiskoe 13 күн бұрын

that's hilarious hahahahahaa

@brownbelpois 13 күн бұрын

ALL GLORY TO THE HYPNOTOAD

@KristianNowak 13 күн бұрын

5:19 "I don't even like water cooling! I think it's a waste of the money!" Ok Linus

@Shaurya_Pant 13 күн бұрын

Damn nice catch.

@jimmyzhao2673 13 күн бұрын

Good one !

@yuvrajdarekar5056 13 күн бұрын

It's a waste of my money*

@SnowyRVulpix 13 күн бұрын

You lip readers scare me far worse than any recording device 😂

@somefreshbread 13 күн бұрын

He doesn't though. It just gets views!

@kirkshangout 13 күн бұрын

I love the Riker stickers on the laptop in the "meeting room". Classic Riker stepping over chairs to sit in them.

@kevinmitchell766 11 күн бұрын

Power moves like that are why he's number one.

@TatsuZZmage 11 күн бұрын

Back injuries exacerbated by the early costumes being too tight made one of the best power moves, from being thrown from a horse

@doslover 11 күн бұрын

Oh thank goodness, I was going to ask why it was Riker sitting on a Christmas tree 😅

@blender_tom 12 күн бұрын

6:40 a google search will show you many studies on the effects long term exposure to ultrasonic noise: "studies conducted to date in Poland and worldwide indicate that ultrasonic noise may cause excessive fatigue, headache, discomfort and irritation?

@crazykleiner 10 күн бұрын

And i am sure it's can damage ears .it's still blasting huge noise .

@unvergebeneid 13 күн бұрын

Fun fact, with loud noises in the near ultrasound range, you can sometimes not hear them but they still cause pain, because the auditory stimulus and the pain stimulus are physically separated in the inner ear.

@Tehn00bA 13 күн бұрын

Isnt that what they used to try to implement as crowd/riot control for the police?

@oiytd5wugho 13 күн бұрын

There's some kind of cricket where I live, can't hear the bastard but it feels like a pin stabbing my ear. Like it's _kind of_ a sound, but the sound is just pain

@BirnieMac1 13 күн бұрын

Largely because it’s just pressure waves Also the pain stimuli is seperate in EVERY organ system because we use specialised afferent nerve fibres to sense different kinds of pain - like we wouldnt have many C fibres because thermal isn’t as high an issue, but we’d have a lot of A alpha, beta and delta Delta is probs the important one because its the faster version of C fibres Alpha fibres are whats involved in the cochlear of the inner ear for balance and proprioception and the beta fibres are just touch

@WereCatf 13 күн бұрын

Interestingly, some KZfaq videos cause me to feel this unpleasant pressure in my ears, even if I can't hear any specific sound. I should dump the audio from the video the next time I come across one and check what frequencies I can see there.

@JackWse 13 күн бұрын

Yeah as someone that gets completely bounced out of a yard like a cat when it has those little laser sensing get off my lawn devices lol.. this sounds like a hellscape! I can't wait for the cyberpunk dystopia where those are just basically everywhere and we've evolved around it with extra consequences!

@Antigen__ 13 күн бұрын

Finally, a Hans Zimmer machine

@Natsukashii1111 13 күн бұрын

That's so close to the sound haha

@jdancouga 13 күн бұрын

Interstellar intensify

@SwirlingDragonMist 13 күн бұрын

That’s the sound of your speakers compressing, if you had full spectrum coverage in your sound system, those parts of Zimmer’s work would sound like music instead of being totally crushed. This is also why you don’t want to send LFE to your mains. At times It’s just too much for them.

@JackWse 13 күн бұрын

Oh you're not wrong! In so many ways! The theater when I finally saw dark Knight return whatever, the third one, was completely blowing out the speakers at the theater causing them to flop just like this stupid thing lol.. But hey sound mixing is hard apparently.

@JackWse 13 күн бұрын

@@SwirlingDragonMist so I usually do that if I can, but I also have full range triples with 12-in woofers? Is is that going to be a problem as well? It just to me made sense to not use a subwoofer when I had four technical subwoofers that were capable?

@Flornmonk 13 күн бұрын

DON'T get this if you own a dog.

@msmith3395 7 күн бұрын

But DO get it if your neighbor does. I’ve been looking for a doggie STFU button for a while.

@Flornmonk 7 күн бұрын

@@msmith3395 Chaotic evil energy lol

@MajesOnTheXbox 4 күн бұрын

Instruction unclear. Sold my dog.

@Luis-gz3oo Күн бұрын

@@Flornmonk that's chaotic neutral tho

@Flornmonk Күн бұрын

@@Luis-gz3oo buying that jammer just to shut up your neighbor's dog is pretty much the definition of evil haha

@4RILDIGITAL 12 күн бұрын

Epic walkthrough on understanding the limitations of such devices in real scenarios. Really got a clearer perspective on how these jammers could be defeated by different types of microphones and their placements.

@BizzWhacken 13 күн бұрын

0:43 Linus is a real one for that.

@lurac5710 13 күн бұрын

he truly didn't kill himself

@laundrybasketdemon 13 күн бұрын

😭😭😭😭😭

@insideeffect6964 13 күн бұрын

Idk about truly but seems you got part if that right 😂😂😂@lurac5710

@PliebertGex 13 күн бұрын

Did he just say- no way my mans Linus Tech Tips- Did he say Jeffry Epstein didn't kill himself?

@alamincomic7068 13 күн бұрын

6th sense finally came out to do the job

@davekelloway3337 13 күн бұрын

Elijah is not the the meme that LTT needed, but is 100% the meme it got.

@charlesandrews2513 13 күн бұрын

I look forward to seeing Elijah in the next X-Men movie.

@MrNortySpock 13 күн бұрын

Loved the spectrogram and the explanations. Well done for taking a complicated system (frequency jamming) and translating it into plain English!

@vedranart 9 күн бұрын

Yeah, me too! Tho, might use Praat software next time instead ;)

@tubesockromance 13 күн бұрын

The one at 5:20 is him saying something along the lines of "I kid you, I don't even like watercooling. And, it's a waste of money"

@davidyusupov1116 13 күн бұрын

This jammer sound effect sounds like the sandworm from dune 2

@13orrax 13 күн бұрын

lol it replaces any recorded audio with a hanz zimmer soundtrack

@Shiro_Amada 13 күн бұрын

The Reapers are invading.

@theRPGmaster 13 күн бұрын

Linus Al Gaib!!!

@brownbelpois 13 күн бұрын

More like the HYPNOTOAD.

@Aaa-dv3oi 13 күн бұрын

FRRR I thought it was just edited from the video to make it seem that way, but that makes so much sense in terms of the movie

@RC-1290 13 күн бұрын

8:12 that's colins actual voice

@BladeWalker91 13 күн бұрын

Biblically accurate voice of Colin

@specodhec341 13 күн бұрын

Is he saying the obvious "yeah, what the fuck?"

@gasracing5000 13 күн бұрын

His voice is higher pitched than I expected?

@Ari.Atland 13 күн бұрын

@specodhec341 , could be a homophone.

@catmangaming2020 13 күн бұрын

I don't want to be reminded about this game existing 50 times in a day

@jwake928 13 күн бұрын

Excellent writing and execution on this video well done lmg

@TheIMadManI 10 күн бұрын

The writers and directors for this video are freaking awesome. Beautifully shot and the bits of comedy sprinkled through just elevate this video so much. Thank you for all you do

@WespectRamen 13 күн бұрын

I loved that little joke about Colin's only opportunity to finally let his voice be heard, was jammed lol

@benwu7980 13 күн бұрын

I like to think of myself as pretty clued in on most internet memes or trivia, but I have no idea where the Colin one started from.

@bootsyz3343 12 күн бұрын

@@benwu7980 Same. Let me wait here for someone to enlighten us.

@pacboygamer6728 12 күн бұрын

@@benwu7980 he fuckes up a lot. started a few months ago. and he gets mad at his fuck ups and sometimes pushes it on his mates. also he wears a helmet a lot. idk if its a joke or a special needs thing.

@pu239 12 күн бұрын

@@pacboygamer6728 thats not colin that's elijah

@helper_bot 12 күн бұрын

@@benwu7980 i may spread some little evil misinformation but on top of my head i think he's just not an English speaker so it doesnt make sense even if he did answer the question

@Ordolph 13 күн бұрын

One thing that's worth noting is that pressure waves (sound) outside of the range of human hearing can still cause hearing damage if it's loud enough. Many people who have spent significant amounts of time working with aircraft will be quite familiar with that.

@fungo6631 12 күн бұрын

In what way does it damage the hearing if it cannot be picked up?

@woolver42 12 күн бұрын

@@fungo6631 The eardrum is still agitated, the sensory cells in the cochlea still get shaken around and break.

@raikhovalencia3835 10 күн бұрын

@@woolver42so theoretically this device could be used as a super evil hidden hearing damage inducer???

@karolakkolo123 10 күн бұрын

@@raikhovalencia3835 Yes, but there surely is a frequency limit past which the cells stop being agitated because at some point the frequency becomes high enough that the cells don't have a chance to move much before the pressure switches from low to high every cycle. So there's a limit even to that. And by the way, some pets can hear much higher than humans can, so dogs could probably pick up that an insidious device like this is hidden somewhere.

@cvp5882 8 күн бұрын

@karolakkolo123 Not exactly true. There are pressure waves at ultra-low frequencies powerful enough to rupture your eardrums. Its not necessarily the frequency that determines its destructive properties, but the pressure and sound wave's energy. Any extremely loud noise can cause hearing damage, whether we hear if or not.

@toniguli 13 күн бұрын

I don't really ever comment, but I really liked this video, especially the balance between technical stuff and the real world implications. Great job and please do more of the deep dive tech stuff in the future. Love it.

@CapArchy 13 күн бұрын

Really wish you had tested with some standard phone mics, since I feel like that's the most likely meeting-room recorder

@timxyz68 13 күн бұрын

Depending on the amount of decibels this thing outputs it is likely damaging your hearing. Just because you cannot hear something doesn't mean the acoustic pressure isn't harmful to your ears.

@TeenPerspektiva 13 күн бұрын

Yep. Cause its still vibrating, just the vibration cannot be understood anymore

@12thMandalorian 13 күн бұрын

i mean you can either be cancelled or be deaf, we all know what option we are choosing

@TatsuZZmage 13 күн бұрын

I expect a bunch of corrupt cops trying to prevent being recorded being crap cops in america to go deaf then.

@OmniMontel 13 күн бұрын

If you can be cancelled and blind you can probably be cancelled and deaf as well.@@12thMandalorian

@moneybilla 13 күн бұрын

@@TatsuZZmage lmao someone's a tab bit special or has a case of the tisms😂😂

@Sleemon1337 13 күн бұрын

2:36 sick use of the lumafield

@Kaizagade 13 күн бұрын

Didn't even think about that when watching it! That's so cool, thanks for pointing that out!

@hobbitronic 13 күн бұрын

Watching this video, I felt like a Linus explained video or aside to explain some of the deeper concepts behind frequency analysis would be a good addition. I think that even without the deeper mathematical grounding, using the platform to give the layman a rundown of concepts like fourier transforms would be a bit of a public service to bridge the gap as to how stuff like this can be developed and analysed, and give people a better capacity to understand how different type of graphs work

@headspacetheace 13 күн бұрын

I'm always here for the audio tech videos, it's so interesting

@reeepingk 13 күн бұрын

Worth noting that high amplitude noises, regardless of whether we can hear them, can still damage our hearing.

@Shotblur 12 күн бұрын

In the same way that sound is pressure and an explosion can blast your ears out, sure, but for the most part, the ear is sensitive only to the frequencies that can damage it.

@fordsimpson2792 10 күн бұрын

@@Shotblur you're wrong and all you had to do to not be wrong was google the thing you were replying to before spouting nonsense

@rkan2 10 күн бұрын

@@ShotblurEnergy is energy

@RiginJustino 13 күн бұрын

0:43 the fact that we can absolutely tell what he said is hilarious holy shit

@the_legendary_poseidon 13 күн бұрын

What did he say tho? I'm guessing he said 'Jeffery Dahmer didn't kill himself !' but I'm not too sure

@aftdawn 13 күн бұрын

@@the_legendary_poseidonWrong Jeffrey, its Epstein not Dahmer

@thesnowman2509 13 күн бұрын

Lmao what what he said was fact.

@martinkeatings7126 13 күн бұрын

In Scotland we actually have quite a few of these deployed in public (perhaps on a slightly different frequency) but turned down so they are just really irritating. As you said at the start of the episode, hearing becomes worse the older you get, so those under the age of 21 have a much higher range of hearing than older folk. These devices are used in places where it is inappropriate for teenagers to hang around (and often do like most teenagers, in groups, and at night) and are causing issues. There is some debate about them being used by companies (i.e. takeaways) because as you said long-term effects are not really studied yet, but their use here is for exactly the purpose that Elijah experienced (albeit at a much lower level) - namely to drive the teens loopy with the sound so they leave the immediate area.

@borderlinecontent8661 7 күн бұрын

Problem with them is that angry old folk put a handful of them in their front garden so they activate every time you walk past and when they live 3 doors down from the corner shop having a barrage of piercingly high pitched noise i think they are more of a nuisance then the kids around the area

@DaringlyLDN 12 күн бұрын

Love the use of video feedback loops for the shots at 3:17 and 8:39. Looks super sleek with the blue, red and purple lighting! 🔥

@LKLM138 13 күн бұрын

I remember a article about playing some high pitch noise in a mall to deter youth hanging out in the mall. They can hear it, but elders can not. And it was aimed to certain times of the day. I remembered this when the Eliah bit came in.

@grumpy2.0 13 күн бұрын

They've been banned I believe, in some countries. As they can damage the Ear with prolonged exposure.

@Tehn00bA 13 күн бұрын

So true. They even started to develop crowd control versions for riot vans, but i dont know if its used or banned. (The microwave riot van one scares me the most)

@craigpoole9218 13 күн бұрын

Mosquito alarm

@Oscar-xs9cv 13 күн бұрын

They still do this where I live. I'm 31 and still annoyed

@benwu7980 13 күн бұрын

@@craigpoole9218 Yeah , Mosquito anti-social anti-loitering. They installed one in a building I worked around 6 years ago, and had to have it disconnected within a week.

@JamesR624 13 күн бұрын

6:18 *Turns on jammer* *Elijah spontaneously becomes Turtle.*

@no-no-noku 11 күн бұрын

On older video game consoles like the Mega Drive (SEGA Genesis) had a low-pass filter integrated into the sound chip (more though the components and low quality of the signal forced higher frequencies to get lost), and this was fortunate as some retail games have bugs in them which cause extremely loud high-pitched chirping at all times. Without this filter, many games would have caused permanent hearing damage in many gamers. Nearly all emulators of these systems add a low-pass filter and enable it by default for this reason. Now we have a device that's portable and encouraged to be turned out for long periods of time which is also undetectable to the ordinary human ear that does the same thing. Fantastic.

@detaart 13 күн бұрын

2:30 I didn't know that this is how sound works. Thanks Linus!

@SwaggieSteve 13 күн бұрын

I can't believe how many times he said the 'N' word just to prove a point

@leonro 13 күн бұрын

Linus must've been sick to claim that thing about Norwegians.

@thedudely1 13 күн бұрын

he really dropped that hard R

@mackado 13 күн бұрын

Linus and Grant O'Brien, both in one week. What a shame....

@unvergebeneid 13 күн бұрын

With a hard r.

@gasracing5000 13 күн бұрын

Contact your local lip reader for a transcript of the scrambled audio. 😅😂

@YouTube-Security 13 күн бұрын

About the potential danges of the Jammer. The way I see it, is that just because you cannot hear it, dosnt mean it can't hurt you. Hearing damage stems from the little hairs in your ears breaking of, due to excessive movement. What I could imagen is them being broken off over time, simply because they are still moving.

@thecasualfly 13 күн бұрын

Totally.. same thing such as noises that may not sound loud but you are around them all the time causes hearing damage.. like noisy machinery .. why it's important to wear hearing projection even though it might not seem "loud"

@zaphenath6756 13 күн бұрын

i'm guessing something like this machine is what caused the hearing damage to the people in the cuban embassy. the US gov't hid this kind of audio jammer in the walls or whatever, didn't realize all the damage they were causing, and refused to own up once all the injuries were brought to light

@Klaevin 13 күн бұрын

except that if those hairs move, then you could hear. If you can't heara frequency, then that hair is either dead, or the nerve attatched to it is severed. The inverse is true, as well : if you can't hear, then no hairs are moving, or the nerve is severed to those frequencies. So the way I see it, unless you can hear something, you aren't getting hearing damage, especially if you're talking about high frequencies. Low frequencies however, could blow your eardrum, but at those energy levels, you'd be out of breath, burned and blown on your ass from the bomb that just blew up right next to you.

@nikkiofthevalley 13 күн бұрын

@@KlaevinThis is false. You can get hearing damage from ultrasound. The nerves have a response time, which means that high frequency signals won't get picked up properly. The hairs are still vibrating at that frequency, which can damage them if the sound is loud enough.

@Skrenja 13 күн бұрын

Hearing loss tends to start with higher frequencies first.

@InternetKilledTV21 11 күн бұрын

As a former Rochester, NYer the lip-reading factor still applies! Rochester among their vast history is a large deaf and hard of hearing community, like Washington DC and Los Angeles. You learn to lip read whether you realize it or not. Especially if someone's cochlear implant dies (or hell, if they don't have one) reading lips is needed to communicate. At least for me, this made me extremely aware (involuntarily) of the shape my mouth makes when saying words. Indeed though, Jeff did not veil his own eyes in darkness.

@BrandonHortman 13 күн бұрын

I love this episode! I wish I knew the spl of the device! It appeared to be very high relative to an assumed 55db conversation judging by your REW software analysis

@GodardScientific 13 күн бұрын

What the heck is up with the production quality of this video?? The b roll, the jump cuts to natural reactions and natural feeling comedic reactions and responses?? New editor, you’re appreciated 😂

@Matthew-ht5yn 13 күн бұрын

It’s Mark

@HealyHQ 13 күн бұрын

@@Matthew-ht5yn Oh, hi, mark.

@TheAcadianGuy 13 күн бұрын

12:48 As a French Canadian, I approve this message.

@jimmyzhao2673 13 күн бұрын

I believe in a 'distinct society', as long as someone else pays for it.

@sammycooly1709 13 күн бұрын

Maybe someday

@scott7699 13 күн бұрын

As a US-CAN dual citizen, I also approve this message.

@DMSparky 13 күн бұрын

Do it. I’d love to see how a provincial Brexit would go. Quexit I guess.

@francoismenard6704 13 күн бұрын

@@DMSparky Better than the ROC is thinking. People always neglect the power that control of the St-Lawrence river represent. Quebec could really hurt the economy of Ontario if it blocked or heavily taxed passage of merchandise. And also there is a ginormous hydro electricity potential that Quebec cannot exploit because of how the federal control what can be built in the river.

@TheTygrane 11 күн бұрын

I'm glad they did a smattering of different mic, but it would have been interesting to see how the polar patterns of a given microphone may have correlated, rather than just the external geometries for directionality.

@nebulousintent733 13 күн бұрын

this was an awesome video! would love more in depth videos like this!

@agasthyareddy9137 13 күн бұрын

Here for when Linus sounds like an A-10 Warthog

@Tehn00bA 13 күн бұрын

Someone needs to photoshop this RIGHT NOW

@hyzenthlay7151 13 күн бұрын

Elijah hearing it is like how some people (like myself) can hear those ultrasonic sensors for animals. That, and love the Commander Riker sticker on the laptop!!

@HelamanGile 13 күн бұрын

I can hear those frequencies too and they can really mess you up and make you feel like you want to throw up

@defeqel6537 13 күн бұрын

@@HelamanGile have you tried barking at them? I have an acquaintance who thinks that works

@lars2k1 13 күн бұрын

Those things are hell. While others then just go confused "I dont hear anything", it hurts my ears. I don't get why anyone can put those in their garden, often not even aligning them properly so everything sets them off. Or the so called mosquitoes, that generate high pitch noises only younger people can generally hear, to prevent a spot becoming a 'hanging out' spot. I walk past one quite often and in the evening it makes a high pitched noise, that my ears neither really like.

@Warutteri 13 күн бұрын

Or the sound of old CRT monitors and TVs, back in the day many people thought I was crazy when I said I knew whenever our neighbours were watching TV because I heard the sound of the picture tube through the walls 😂

@tyrgoossens 13 күн бұрын

@@Warutteri I'm well into my 40's and I can still hear coil whine from some devices that even my teenaged kids can't hear. It's pretty annoying.

@daftlife-ns5hc 12 күн бұрын

combination tones are so cool. iirc, keys on a keychain dont even jangle in the audible spectrum (somewhere around 40k hz), you just hear the lower perceived combination tones they make.

@devtank 13 күн бұрын

This is cool, I've never heard of them before, and my hobby is field recording. Looking at that heat map, its a repeating pattern, and I would suspect that with governmental level budgeting and an interruption free life, one could determine the frequency variations that stand out from the repetition, run through extremely high and low bandwidth filtration and rebuild from there. Maybe throw in a second channel offset by .05 millisecond delay, for dimension.

@KipSunChaser 13 күн бұрын

3:45 Bro it knits a blanket out of sound waves. That's awesome!

@Adam_Boots 13 күн бұрын

I love the Riker Maneuver stickers on the lid of the laptop.

@claybirdyshaw5737 13 күн бұрын

These have been around for a long time. A guy at my high school had a modified YakBak that did this. You have to hold it very close to a microphone and everyone could hear a slight static noise. It was a neat trick tho.

@TheJakeblake 12 күн бұрын

The Linus from the UPDF ad is yet another Linus Snapshot 🤣

@fredwupkensoppel8949 13 күн бұрын

2:48 I like how he didn't need to change from his regular voice for the high pitch

@MrSmore 13 күн бұрын

Linus could have used this when he dropped that HARD R!!!!

@MTMProductions 13 күн бұрын

💀

@ZachMauch 13 күн бұрын

For those that don't know, he didn't actually do it. He was just talking about it on WAN show and mistakenly thought "Hard R" refered to calling someone "Ret***ed". Luke informed him that it meant putting the r at the end of the n word.

@theRPGmaster 13 күн бұрын

@@ZachMauch Don't listen to this guy. Just misinformation. Linux Sebastian actually said the ultra super duper hard R

@michaelmcconnell7302 13 күн бұрын

@@theRPGmaster CAN CONFIRM

@DarkForce2024 13 күн бұрын

I'm from the US, and even I had to look this one up. As a matter of fact, I forgot all about it and had to look it up AGAIN yesterday (with the whole Stellar Blade thing), and I was like "I've read this before, this is familiar". NOW I remember, it was from the WAN show! Thanks!!

@zacharykessler2206 12 күн бұрын

I love love love the audio tech vids. Thanks again yall!

@serj112 11 күн бұрын

The Sony transmitter Linus uses has a function to filter out ultrasound, it’s “OCUPNCY SENS = ON” in the menu. It’s designed to remove audio issues caused by ultrasonic occupancy sensors, I wonder if it has any effect on the jammer. It’s really a question of how linear the input stages before that filter are, because if the nonlinearities are high enough to act as a mixer, then the ultrasound will have already mixed down to audible frequencies and will be untouched by the filter.

@forayz2385 13 күн бұрын

stores should use this to prevent "prank" youtubers from making content

@wingracer1614 13 күн бұрын

Doing so would drive off the handful of customers that can actually hear it and once it's use got out in the open (which wouldn't take long since some people can hear it) could lead to lawsuits from people claiming hearing damage or other BS problems which may very well be frivolous but still cost money to defend. And of course once that news is out, using it would be pointless since anyone wanting to make a video in your store could easily find out how to defeat it.

@claudiobizama5603 13 күн бұрын

@@wingracer1614 stores used to have a "mosquito" that makes a high pitch sound that specifically aim at teens loitering People are evil

@anonymous-zg7wh 13 күн бұрын

@@wingracer1614 Im not sure what it is these some people are hearing, is it that they have above average sound range? Why did elijah nearly explode at that sound?

@forayz2385 13 күн бұрын

@@wingracer1614 I meant flipping it on when people are obviously trying to make content but your point still stands

@HerpaDerp-ht8hy 13 күн бұрын

@@anonymous-zg7whHe’s young. Typically speaking, the younger you are, the higher frequencies you can hear.

@Neojhun 13 күн бұрын

Oh soo that's how Futurama's Hypnotoad works.

@anthonypace5354 Күн бұрын

It seems like just by observing the patterns used by the wave emitter, you could just observe it applied to background noise, cancel out the pattern and look for data that doesn't correlate to rebuild your audio. You could then, if the sample was garbled, just reconstruct it, which is as simple as running it through some AI trained to rebuild based on levels of noise. A little advanced for the average individual, for now, but, at least at first glance, seems very doable.

@yourm5732 13 күн бұрын

I’d love to see the results of having three or four of these devices spread throughout a room. That could eliminate the issues of microphones being at the 45/90 angle to the single device.

@MixMeMcGee 13 күн бұрын

Using the a frequency response that matches the handheld you’re holding while talking about it…. So good. Thank you!

@Gamersb3stfri3nd 13 күн бұрын

I really like these deep dives on interesting tech. Even if it's not something I would ever use, just having the understanding of how it works, how the microphones are designed and how these kinds of things interact with those designs is interesting

@Jaylou88 9 күн бұрын

This video reminded me that my very common house plant, Cactuar, is due for its yearly watering. Thanks LTT 🙂

@scottdean7246 13 күн бұрын

6:45 What do you mean? we literally have a diagnosis for continues tonal exposure in the form of SSHL (sensorineural hearing loss) and NIHL(noised induced) which comes with load of studies on the effects of sudden or consistent low to high tones. and you can literally see the frequency's dangers by how potent they look on your measurement mics heat map, and by the wincing pain Elijah seemed to be in. Or was that played up for the video

@labbiee 13 күн бұрын

The new lumafield scans are so nice in these videos!

@MiaWinter98 13 күн бұрын

I feel Elijah, I myself can hear a lot of frequencies most people can't, so I suffer around cheap tech or soon-to-fail stuff. That thing must be hell to listen to

@Scarlet_Soul 13 күн бұрын

Chargers go eeeeeee

@jetardeshna3449 13 күн бұрын

@@Scarlet_SoulOh yeah the cheap Chinese ones absolutely do

@KyriosHeptagrammaton 13 күн бұрын

@@Scarlet_Soul I seen my mom's set-ups and said "What's wrong with your charger" And she's like, what it's fine. Mom, it sounds like it's going to explode.

@MrHXCPancake 13 күн бұрын

Wow you're so unique and cool

@osniko 8 күн бұрын

@@MrHXCPancake ok

@ImARichard 13 күн бұрын

Has linus always had the Riker sitting down stickers on his laptop? I need those in my life.

@zaydabbas1609 11 күн бұрын

This is the same jamming technique cheap RF jammers use. It’s not about frequency nonlinearity, but gain nonlinearity. An input tone that is too high will push the amplifier gain into the compressed region (instead of the linear region), leading all normal signals to be attenuated

@MrBogdanel1285 13 күн бұрын

From the waveform, it does seem to cover the real signal well. But that’s not very important. Did you guys try to do a Fourier Transform to see if you can filter out the jamming and reconstruct the actual speech?

@Devrij 13 күн бұрын

Here's the thing, there's more to it than just overwhelming the diaphragm. You can blow out the mems diaphragm and have it just clipping out like mad, but you also have the digital aliasing of the audio it's recording that reduces the recorded frequency into the audible range, and you also get harmonics that are closer to audible noise as well. All of that makes ultrasound really hard to keep out of an audio recording. Generally speaking, mems mics are out for anything where high amplitude ultrasound is playing, as you found yourself.

@Robert08010 8 күн бұрын

Try this in a home with dogs and watch the reaction. You will find out really quickly that it's not for home use. And with more and more people having "service dogs" in the workplace, this wont be suited for there either. As to how it works, I suspect its not a beat frequency that you are hearing in the recording, but rather it's the sound of distortion in the mic element. It was a very smart move thinking of the large diaphragm mic. I hadn't expected that. But I did expect limited effect with the lav simply due to proximity. If the mic is close enough to your mouth and the jamming device far enough away, if still might be possible to cancel out or filter out the sound of the jammer. It HAS to distort the diaphragm all the way in order to block your audio. If it only moves the diaphragm half way, its likely that audio can be recovered.

@ThatGuy-wj9pr 6 күн бұрын

This was a great video. Informative and funnier than normal. Thanks!

@JTCF 13 күн бұрын

For those who suggest a use for this thing: some people do hear them and can hear them a lot. Putting something like this in a public space would risk health of many people, this could be illegal. Otherwise the science behind this thing is pretty cool.

@falsemcnuggethope 13 күн бұрын

It may damage a person's hearing even if they can't hear the sound. There's only a little scientific evidence of this, but if it's the case, the person wouldn't even know to protect themselves.

@iMadrid11 13 күн бұрын

Mr. Robot used a similar device to avoid being recorded when they knew the room is being bugged.

@jamcdonald120 13 күн бұрын

5:10 great, try it with one TRAINED with the distorted audio instead of non distorted. Those things cant even hear though some fan noise

@TrollFaceTheMan 13 күн бұрын

I have a cochlear implant, I wonder how that would work with the jammer? Would be interesting to find out.

@pompomaddons 13 күн бұрын

we are getting raided with this one!🔥🗣️🥶🥶

@RickyDonker 13 күн бұрын

This was a really great video guys, great production, super cool effects/visuals/ideas/jokes and all the beats where they should be! Love it!

@Cyber.Lynx. 13 күн бұрын

Next project: A noise cancelling device that neutralizes the music your neighbor just loves to share, bless his heart.

@tehdudester 13 күн бұрын

I love the Cactuar in the meeting room!!!

@theColeHardTruth 13 күн бұрын

Could these cause hearing damage? It still vibrates your eardrums right? You just can't hear it?

@wingracer1614 13 күн бұрын

Possibly. Hard to say without knowing exactly what it's transmitting and at what power level. But yes, that is a possibility.

@falsemcnuggethope 13 күн бұрын

possibly, even if you don't even hear it. And then you don't know to exit the room.

@BasedPotato403 13 күн бұрын

you should look at the speech jammer made by Benn Jordan its very interesting and its similair to how this works in the way that we cant hear it but microphones can as it covers the whole spectrum

@maulerrw 11 күн бұрын

so is it like an amplitude modulated ultrasonic transducer? That’s how you can make directional speakers, which are super cool. you can pinpoint a sound at a specific position like a sound spotlight.

@fred_e 12 күн бұрын

Thanks for zooming in so we could lip-read what you said about Good ol' Jeffy

@Tennosoul 13 күн бұрын

Hey great timing I was just searching video for a dinner

@Nov1cegg 13 күн бұрын

Cheers, i was searching one to have lunch

@daniwalmsley611 13 күн бұрын

^raises a glass* to the LTT dinner party

@orlagh277 13 күн бұрын

you shouldn't eat videos for dinner bro, they don't really have any nutritional value.

@yom35 13 күн бұрын

have good dinner bro hello

@TreasureHoardingDungeonDwarf 13 күн бұрын

@orlagh277 Has a point, I heard the portions they serve are byte-sized... Edit: I'll see myself out now.

@hollis1223 13 күн бұрын

How would it sound to someone wearing hearing aids? I wear them and if this affects microphones, I imagine that I would be able to hear it then

@bionic_warrior 13 күн бұрын

This was very interesting, great job gang!

@TheInternalNet 13 күн бұрын

As a follower since 2010. Come along way since doing motherboard unboxings.

@SP4CEBAR 13 күн бұрын

I love the usage of the lumafield scans

@charliesretrocomputing 13 күн бұрын

That would hurt my ears SO bad, I can hear 20kHz, I guess I'm a "superhuman"!

@Tehn00bA 13 күн бұрын

Until you get old, that is...

@charliesretrocomputing 13 күн бұрын

@@Tehn00bA true 😂

@ohioplayer-bl9em 13 күн бұрын

For now. I can’t hear the thermometer beeping when it’s finished now

@MrHXCPancake 13 күн бұрын

Lying in the Internet is fun

@charliesretrocomputing 13 күн бұрын

@@MrHXCPancake i'm SLIGHTLY lying... comment edited to be 100% true

@liarus 13 күн бұрын

Lol, i'm glad you guys mentioned the Elijah case, it's not because you can't hear it that it can't damage your ears, same goes for lazers that you can't see

@juancisneros725 13 күн бұрын

It would have been interesting to see how it sounded with each microphone

@wrth 13 күн бұрын

“it’s legal” famous last words

@abb0tt 13 күн бұрын

It’s legal…for now 😢

@manitoba-op4jx 13 күн бұрын

it's legal until the government decides they can record you without consent.... oh wait that happened 40 years ago

@Stonehawk 13 күн бұрын

Classic Canadians: It's never a war crime _the first time!_

@I_Am_Empyrean 13 күн бұрын

The only proper form of noise jamming is through a speech jammer. It basically broadcasts what you would hear in a crowded subway/venue, making it hard for a recording device to pick up your conversation. If you then pair that with a low power ultrasonic jammer, a low power version of your jammer, most sensitive conversations are irrevocably obliterated.

@turbodude 13 күн бұрын

can you link to a couple of products that do this? i'm curious...i'd love to go to someones house that uses alexa or google home and put one of these in my backpack, just to mess with them.

@thierryfaquet7405 13 күн бұрын

but you also can't speak to anyone either... The perfect jamming would also jam your own speak to everyone else. If someone can ear you, there's a way to record you.

@EugeneYunak 13 күн бұрын

can you share some links to actual products? asking for Ukrainian army, we have a real usecase

@LivingUnlabeled 13 күн бұрын

another viable form of noise jamming is if i find the microphone through echolocation and scream very loudly so as to disrupt the recording. this is effective because the yelling would overpower the recording and it would have a very hard time picking up audio from other sources, especially if i'm yelling right in front of it.

@I_Am_Empyrean 13 күн бұрын

@@EugeneYunak I don't know if there's a premade product for this, there probably is but you can usually just make your own. All it really is, is a bunch of battery powered speakers firing in as many directions as possible while using the same audio clip. You can get a recording of a busy metro station or something, so long as it's FLAC or other lossless codec. You then analyze the waveform to make sure it covers all the bands you need, continuously, and if not you can layer other audio over it or boost certain frequencies. If you do it correctly, with the ultrasonic jammer active at the same time you should completely overpower all frequency ranges responsible for speech while still being able to hear the other person.

@creativecraving 13 күн бұрын

2:55 Reading between the lines here (4:40, my theory was confirmed!), I'm guessing it pulses ultra high frequency sounds with frequency of the pulses being much lower. Then, when the microphone "recovers" from each pulse, it's at a frequency we can hear, so we hear the diaphragm flapping. If so, they could even vary the pulse frequency to target different frequency of human hearing. I bet I could make a jammer audio clip using a DAW!

@thomasoreilly6140 11 күн бұрын

Great video! I appreciate the level of information.

@briandewolfe 13 күн бұрын

All glory to the HypnoToad!

@TreasureHoardingDungeonDwarf 13 күн бұрын

Wow cool comme- ALL GLORY TO THE HYPNOTOAD!

@dreadlock17 13 күн бұрын

I forgot how much of a menace beardless Linus could be

@marsaustralis6881 13 күн бұрын

I'm not sure if it's my tinnitus or what, but I can still hear the higher-frequencies, whether it's ultrasonic speakers (those fancy "only you hear it" speakers used in some museums or novelty tech) or a CRT TV being turned on a room away and a wall between.