Turning Sound Into a Laser

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  • Опубліковано 7 січ 2025

КОМЕНТАРІ • 1,2 тис.

  • @GigsTaggart
    @GigsTaggart 6 років тому +1150

    I built this, so, some build notes:
    IMPORTANT: Vcc1 and Vcc2 are switched in the schematic in the video! It doesn't seem to burn out the H bridge but be aware that they are labelled the other way in the datasheet.
    It's not very loud if you use the H bridge and 12 volts. If you crank it up to 24 or 30 volts it's a more reasonable volume, but the 7805 is going to get really hot if you power it off the same voltage.
    I tried feeding the modulated output from the 555 to a Sure Electronics 8 watt Class D amp I had, and that did work, but it introduces a decent amount of hiss. The H bridge is a lot cleaner, but it's harder to get the volume up. On the plus side it's louder and only needs 12 volts. The transducers do start to get warm running off the class D amp. It may be worth putting a low pass around 100-200khz on the class D output, but I didn't try it yet.
    It's super sensitive to the capacitance. I got lucky I guess because the two caps I picked to get into the right ballpark turned out to be pretty spot on 40khz. Even adding a 1pF to it detunes it slightly. A variable capacitor might be a good idea (alongside a fixed one, you only need a few pF of adjustment). If you are off 40khz by much it becomes almost inaudible.
    Anyway thanks for this CodeParade, even with the few hiccups I was able to recreate this and the effect pretty easily. It does really screw with you when it sounds like it's coming from somewhere else.

    • @CodeParade
      @CodeParade  6 років тому +160

      That's awesome! I'm so glad you got it working 😁
      Those build notes are spot on with my experience as well. I also heard much louder volume with higher voltages (16-24v) but yes you'd have to ditch that 7805 for something like a buck converter, I just didn't have one on hand.
      Yeah, the capacitor tuning was really important, I kept putting different small capacitors in parallel and just tried to see which configuration was loudest. Even though the transducers are rated to resonate at 40kHz, I found that in my configuration, I got louder resonance closer to ~44kHz so it really needs to be tuned by ear anyway.
      I'd love to see pictures or video if you get the chance.
      And sorry about those Vcc's, I must have mixed it up when I labeled them!

    • @GewelReal
      @GewelReal 6 років тому +25

      By hot you mean hot for humans or hot for electonics? I'd put radiator on it

    •  6 років тому +36

      @@GewelReal Linear regulators are one of the least efficient (but cleanest in terms of electrical noise) voltage sources. They burn excessive "volts" in heat. If you had a 7805 (very common 5 V linear regulator) and pulled 100 mA out of it with input voltage of 20 V, you'd be burning (20 - 5 - 1.2) * 0.1 = 1.4 Watts of heat and the regulator's temperature would get easily over 100 °C.
      Buck converters (such as those found in smartphones) are much more efficient and I'd definitely use one for this project, but sometimes the only you have laying around is a good old LM7805. :)

    • @CedarAce1000
      @CedarAce1000 6 років тому +3

      @Gigs where did you buy your speakers?

    • @walrus8444
      @walrus8444 6 років тому +2

      @Gigs is this what you are talking about? store3.sure-electronics.com/2-x-8-watt-class-d-audio-amplifier-board-tpa3110

  • @grivar
    @grivar 6 років тому +1381

    Super cool. Time to make a sound gun to make it seem like people are saying things they aren't.

    • @taicanium
      @taicanium 6 років тому +308

      That's just called politics!

    • @freecrac
      @freecrac 6 років тому +8

      Technical yellow-breasted chat.

    • @deborahjackson8204
      @deborahjackson8204 6 років тому +32

      *N WORD*

    • @NotBigSurprise
      @NotBigSurprise 6 років тому +108

      "Yo wassup mah nigga"
      Aiming it towards some random guy, while a black guy is also there.

    • @sethparrow04
      @sethparrow04 6 років тому +26

      Or doing things they didn’t
      🙎‍♂️💨

  • @misaalanshori
    @misaalanshori 6 років тому +1623

    *"I don't know why it works like this, but I just accept it."*

    • @GeneralPet
      @GeneralPet 6 років тому +146

      Quantum mechanics in a nutshell

    • @LaughingOrange
      @LaughingOrange 6 років тому +14

      This video in a nutshell.

    • @twilightknight123
      @twilightknight123 6 років тому +44

      Here's a simple explanation from a physicist in terms of the slit diffraction shown in the video: I'm sure you've heard that higher frequencies result in smaller wavelengths, right? Imagine the waves incident on a slit. If a wavelength is large, the slit may appear "narrow" to the wave, similar to you walking through a doorway. You are aware there is a doorway and you change your behavior to ensure that your body gets through that door. Now imagine a smaller wavelength, such as an ant, going through that same door. Well now the doorway looks enormous. The ant hardly notices that it's even a dedicated doorway and hardly has to try to fit through. Thus he doesn't have to change his behavior and can continue walking straight through.

    • @misaalanshori
      @misaalanshori 6 років тому +4

      @@twilightknight123 cool...

    • @GeneralPet
      @GeneralPet 6 років тому +14

      @@LaughingOrange He's basically using a normal audio signal, but encoded on a carrier high frequency ultrasound signal. The Ultrasound which cannot be heard has the property to not spread out much, so the audio is also being carried without spreading. If you wanna understand this just research FM radio waves. The signal is interpreted as the small frequency changes in the otherwise constant high frequency signal. BUT i have no idea why we can hear the carried signal. Isn't it still in high frequency range or am I missing something?

  • @L9X
    @L9X 6 років тому +519

    You deserve more subscribers. honestly.

    • @citrusblast4372
      @citrusblast4372 6 років тому

      Seriously

    • @certified-forklifter
      @certified-forklifter 6 років тому

      i agree
      @@citrusblast4372

    • @GreekGadgetGuru
      @GreekGadgetGuru 6 років тому +4

      Not enough oobleck or orbeez. You know the rules

    • @damaomiX
      @damaomiX 6 років тому

      What the number of subscribers then? Now it is 53k, I think it grows very quickly.

    • @damaomiX
      @damaomiX 6 років тому

      What was the number of subscribers then? Now it is 53k, I think it grows very quickly.

  • @ThreeProphets
    @ThreeProphets 4 роки тому +415

    Congratulations. You've independently prototyped the Long Range Acoustic Device

    • @Stopinvadingmyhardware
      @Stopinvadingmyhardware 2 роки тому +1

      More like you tortured me with them for five years like a fucking asshole

    • @Alkatross
      @Alkatross 2 роки тому +2

      Is that really how they work? Greater than 20khz?

    • @noname-codm4590
      @noname-codm4590 2 роки тому +38

      More like the Fart Accuser Device, imagine playing a fart sound and pointing it on people

    • @Kev98213
      @Kev98213 2 роки тому +2

      @@noname-codm4590 lmao the fact that people around are gonna think the objective farted

    • @noname-codm4590
      @noname-codm4590 2 роки тому

      @@Kev98213 thats objectively true

  • @Asdayasman
    @Asdayasman 6 років тому +376

    There are cool applications for this. Given that it "sounds like" the sound is coming from the reflective surface, you could use this as a spooker in haunted houses, or as a distraction generator in military or milsim situations.

    • @notanimposter
      @notanimposter 6 років тому +64

      Definitely would be good as a distraction generator, or for simulating sounds coming from certain parts of a room. You could use it for surround sound with minimal wiring too I bet. Instead of running wires to each speaker, they only need to be inanimate reflector boards for the sound waves.

    • @Asdayasman
      @Asdayasman 6 років тому +42

      I don't imagine the sound would be too high quality, though. When you're building a HiFi solution in your home, running wires for the speakers is part of the fun.

    • @robo3644
      @robo3644 6 років тому +1

      how are named this application

    • @intocoasters
      @intocoasters 6 років тому +11

      This seems to work like the HSS speakers. And I do use them in my haunt. Usually, to get sound to come from a projected image. Like lightning and rain on a wall or spiders/snakes/etc on the ceiling.
      It's really effective at throwing the sound onto the image without feeling directional as if from speakers off to the side.

    • @madi4428
      @madi4428 6 років тому

      possibly use this in card as a way for people to listen to music when others don’t want to hear it, it’d be hard to stop the reflection tho.

  • @xtrashocking
    @xtrashocking 6 років тому +127

    the -sun- sound is a deadly laser

    • @nade5557
      @nade5557 6 років тому +16

      not anymore there's -a blanket- some paper

    • @awesomestuff9715
      @awesomestuff9715 6 років тому

      @@nade5557 yes that was beautiful

    • @fractionofstuff
      @fractionofstuff 6 років тому

      This thread is gold

    • @Andre-gn4sj
      @Andre-gn4sj 5 років тому +2

      hey can we -go on land?- "make sound?"
      no...
      why?
      the -sun- "sound" is a deadly laser
      not anymore there´s -a blanket- paper

  • @lithostheory
    @lithostheory 6 років тому +82

    0:24 it is not dependent on the frequency, but on the ratio between the wavelength and the hole size!

    • @entropyzero5588
      @entropyzero5588 6 років тому +23

      Which, for a static hole size, are the same thing ;)

    • @lithostheory
      @lithostheory 6 років тому +25

      @@entropyzero5588 True, but it is important to realise that the math does not care about absolute units.

    • @h4724-q6j
      @h4724-q6j 6 років тому +3

      @@lithostheory idk about that. I've seen some complete chonkers in my time which the math would definitely care about.

    • @revimfadli4666
      @revimfadli4666 6 років тому +5

      Isn't wavelength inversely proportional to frequency?

    • @h4724-q6j
      @h4724-q6j 6 років тому +1

      @@revimfadli4666 I think you have to have a constant for it to be proportional, and wave speed isn't a constant.

  • @Devilofdoom
    @Devilofdoom 6 років тому +474

    I would totally record fart sounds and point it at people to make it look like the sound came from them

  • @AJarOfYams
    @AJarOfYams 6 років тому +296

    I’m both disappointed you didn’t turn sound into light and impressed you explained and made a focused beam of sound

    • @muhammadm241
      @muhammadm241 6 років тому +3

      Exactly!

    • @BigOlSmellyFlashlight
      @BigOlSmellyFlashlight 6 років тому +2

      me lol

    • @nolanwestrich2602
      @nolanwestrich2602 4 роки тому +4

      About turning sound into light: read up on pistol shrimp.

    • @BierBart12
      @BierBart12 4 роки тому

      @@nolanwestrich2602 Or actual pistols.
      Or explosives in general.

    • @nolanwestrich2602
      @nolanwestrich2602 4 роки тому +6

      @@BierBart12 Well, that's more like producing light _and_ sound. Pistol shrimp produce light _from_ sound.

  • @cometaHavoc
    @cometaHavoc 6 років тому +300

    Me: Hey can i make music?
    CodeParade: NO
    Me: Why?
    CodeParade: SOUND IS A DEADLY LASER

  • @integza
    @integza 6 років тому +18

    This video idea is just awesome! I sincerely don't know how this hasn't gone viral yet! I'm spreading this on Reddit ;)

  • @ryanbrown172
    @ryanbrown172 4 роки тому +20

    This is awesome. I think another reason it is highly directional is because you made a PHASED ARRAY where all waves are in phase. Therefore the wave peaks are constructive in front. I’d bet you can direct the sound electronically by shifting the phases of the different stealers to change direction. Look up phased array radar.

  • @rosly_yt
    @rosly_yt 10 місяців тому +3

    These seem really useful in an arcade setting, where every machine wants to be blasting sound, but where you don't customers to be overwhelmed by said sound.

  • @connorcriss
    @connorcriss 6 років тому +254

    wtf you're more underrated than captaindisillusion

    • @dotXyore
      @dotXyore 6 років тому +6

      CaptainDisillusion is not underrated. What the fuck are you on?

    • @chebhou
      @chebhou 6 років тому +10

      @@dotXyore he is

    • @BrokenLifeCycle
      @BrokenLifeCycle 6 років тому +11

      @@dotXyore You seem quite... disillusioned.

    • @ObjectsInMotion
      @ObjectsInMotion 6 років тому +4

      @@dotXyore I don't think you understand what underrated means. If you think he isn't underrated, then you think he is more popular than he should be.

    • @dotXyore
      @dotXyore 6 років тому +5

      @@ObjectsInMotion CaptainDisillusion is very popular and well known. He possesses the popularity to match his value. Underrated, he would have less than one million subs with almost no mention of his name. Overrated, and he would have hundreds of millions of subs with his name being mentioned on social media every single day. But it's neither here nor there. He sits at a comfortable level of recognition to suit the amount of work he puts out, especially when taking into consideration his healthy Patreon earnings.
      Just because I don't think he's underrated, doesn't mean I think he's overrated. That's some damn fine ignorance you're exhibiting.

  • @neumanngregor
    @neumanngregor 4 роки тому +43

    At high volume, you can damage your ear drums even if you don't hear, remember that your ears are exposed at the waves in the air. BTW that is why you don't see something like this on big. At the level you output is not different from a live performance, won't get you deaf but i say DON'T CRANCK THE OUTPUT POWER UP, is for your and others good. Very nice to see someone revive this old tech. 👍

    • @josephchiu4034
      @josephchiu4034 2 роки тому +2

      Just like you can damage your eyes with optical lasers without realizing it...

    • @veiledAutonym
      @veiledAutonym 2 роки тому +3

      High power versions are being used by police and military forces around the world against civilians as area denial "non lethal" weapons. They have been causing permanent ear damage.

    • @selfhelp441
      @selfhelp441 3 місяці тому

      could you provide some more insight or links explaining this?

    • @neumanngregor
      @neumanngregor 2 місяці тому

      @@selfhelp441 What how ears work or how sound waves work ? It's real nothing special, sound like music for example, is a combination of high and low pressure that hits your eardrum, your brain interprets this. Now the less known thing , any wave even in the inaudible range, over 20khz are still moving your eardrum even if your brain doesn't know how to process it and it says there is silence. Same with UV or IR lasers, you see nothing until you really see nothing as you get blind.

  • @Suzuki_Akira
    @Suzuki_Akira 4 роки тому +3

    Nice work! This is the principal behind Sound Lazer, LRAD and Ultrasonic Weapons function!

  • @HYOKSU1
    @HYOKSU1 6 років тому +8

    Nice result. What really makes it directive is the array. It is clever of you to modulate the sound to unltrasound freq. so that the BW to centre freq. is so small. Only then you can apply array theory and only then forming those speakers with separation of half wavelength of the carrier freq. (Ultrasound freq.) you get high gain at the bore sight while very little power going in other directions.
    Try changing the phase between speakers and you can change the main beam direction.
    Good work and well done👌

  • @SianaGearz
    @SianaGearz 5 років тому +3

    I don't know how i missed this, this is the best thing i've seen all year! Not because it's useful, but because it's so absurd, so simple, and apparently even works!

  • @deckard6052
    @deckard6052 3 роки тому +4

    This is incredible: this could be used to send messages to anyone nearby, without anyone noticing, as long as so can send a canceling soundwave to all other people around (preferably not a large amount of people)

  • @adamkekow6558
    @adamkekow6558 6 років тому +29

    Non linear acustic+beamforming=even better sound laser.

    • @charlesmartin1972
      @charlesmartin1972 5 років тому

      Electronically controlled delay elements so one can steer the beam with no moving parts...

  • @Minihood31770
    @Minihood31770 4 роки тому +8

    When thinking about how high frequency waves don't spread out as much, it's better to think about the wavelength.
    When a wave passes through a slit, it diffracts at the edges, you can sort of imagine this like a friction slowing the wave as it brushes past the walls on each side, which causes it to turn as it passes through, and on the other side is spreads out in a growing semi-circle/-sphere.
    If the wavelength is much smaller than the width of the slit, this is analogous to making the slit much wider. For a large section of the wave in the centre of the slit, it's as if there were no walls and it is travelling in empty space. The vast majority of the sound is able to pass straight through without diffracting.

  • @somekid8311
    @somekid8311 Рік тому +3

    dude made this super complex borderline magical tech seem like childs play

  • @TheSetUp50
    @TheSetUp50 6 років тому +1

    Sound is the key to the future. Plz keep at it and share more.

  • @cheezemonkeyeater
    @cheezemonkeyeater 4 роки тому +9

    When you said laser, I was imagining a soundwave so focused it could cut things, which I didn't think was possible.
    I guess it's not, but this was neat. I can still see tons of interesting applications for this.

    • @aleksandersuur9475
      @aleksandersuur9475 4 роки тому

      Ultrasonic cutters are a thing, basically a pieco driving a blade. Useful for some rather tricky cutting operations ua-cam.com/video/NBY_ES2V-l4/v-deo.html

    • @skepticmoderate5790
      @skepticmoderate5790 4 роки тому

      @@aleksandersuur9475 That's not even close to the same thing.

    • @aleksandersuur9475
      @aleksandersuur9475 4 роки тому

      @@skepticmoderate5790 Maybe not, but if you want to cut things with sound you don't exactly have many options to choose from.

    • @Crabm38
      @Crabm38 2 роки тому

      You can use focused sound waves that can cut things. Any wave carries energy and, given enough time and energy, will heat up a surface, which will eventually cause burns or, in other words, cuts. Years ago, I attended a presentation in which a guy from MIT suggested that laser-like sound waves could be used in surgeries and even replace conventional lasers.

  • @nopoliticalparties
    @nopoliticalparties 3 роки тому +2

    "If you only want one person to hear it it has to be pretty quiet, and can reflect easily off of PEOPLE!! " Wow sick vid!!

  • @tomfindlay5815
    @tomfindlay5815 6 років тому +43

    Make a phased array so you can steer the beam!

    • @tylisirn
      @tylisirn 5 років тому +2

      When I saw the number of speakers, I thought it would be. Slightly disappointed that they were just to make a "bigger" speaker. But otherwise very fun demo.

    • @navneetkumarpatel3628
      @navneetkumarpatel3628 5 років тому +1

      @Banter Maestro2 so, from array two waves are coming out ,one that is modulated and one is ultrasonic ? is in't it ? plz reply ?

    • @navneetkumarpatel3628
      @navneetkumarpatel3628 5 років тому

      @Banter Maestro2 how much is spacing between the transducers ?

  • @PichanPerkele
    @PichanPerkele Рік тому +1

    Without even realizing, this is my third time stumbling upon your videos while searching for weird stuff. I guess it's time to subscribe!

  • @jonathanfields87
    @jonathanfields87 2 роки тому +13

    Now make it a phased array where you can point it in many directions. This is cool stuff man. Subscribed for sure!

  • @ZemikianUchiha
    @ZemikianUchiha 6 років тому

    This amazing video/concept and the positivity in the comments section is making my day! Keep the good stuff coming!!

  • @webx135
    @webx135 4 роки тому +6

    Bose used to have a 5.1 surround system built into a TV that worked on this very principle. It would position 4 virtual speakers on walls in the room, and the sound would be beamed to those locations. And then all of Bose's DSP stuff to fix up the sound. It was a very impressive tech demo.

    • @vinylcabasse
      @vinylcabasse 11 місяців тому

      i don't remember what bose had (possibly just a prototype and never a real product?) but yamaha *definitely* had this tech in their YSP (yamaha sound projector) soundbars, like the YSP-5600

    • @webx135
      @webx135 11 місяців тому

      @@vinylcabasse It was a rather short-lived product. But I remember this was supposed to be the premise of sound bars later. Like the YSP. I've never actually heard the YSP, but I bet it's awesome.
      I feel like in this area, Bose should have stuck with research, patents, and licensing. Moreso than making actual products.
      Instead they have just kinda turned into a boomy overpriced headphone brand. But their DSP stuff was super top-notch.

  • @aidanwansbrough7495
    @aidanwansbrough7495 6 років тому +3

    That is really cool!!! I can imagine there could be quite a few uses for something like that!

  • @kennethirgendwas4616
    @kennethirgendwas4616 6 років тому +1

    i just loudly said wow when i realized the effect. awesome video

  • @jtdancy786
    @jtdancy786 6 років тому +4

    This would be a really good device for Halloween prank. This is amazing.

  • @Known_as_The_Ghost
    @Known_as_The_Ghost 4 роки тому +2

    Wow, this _sounds_ incredible!

  • @SeanHodgins
    @SeanHodgins 6 років тому +42

    Is this what they used in that speech jammer "sound gun"? It kind of looks like it. I want to make one now!

    • @fss1704
      @fss1704 5 років тому +1

      daaaaaaaaaaaaamn yeah

  • @Quang_Tran_asdf
    @Quang_Tran_asdf 6 років тому +1

    In NDT we've been doing this for a loooooong time. If you've ever heard about Phased array ultrasonic testing, it's almost the same principle. We have an array of elements that emit ultrasound wave, and by adjusting the delay between elements we can focus or steer the sound beam as we want

  • @sirscorpio8220
    @sirscorpio8220 6 років тому +134

    At first I was like “THIS IS CLICKBAIT! You didn’t turn it into a laser” but then I realized that lasers are defined as concentrated waves of sound or light

    • @XYZPlayers
      @XYZPlayers 4 роки тому +31

      No. Laser is literally light exclusively.

    • @matthewminucci5649
      @matthewminucci5649 4 роки тому

      Oliver I would like some proof.

    • @ImXyper
      @ImXyper 4 роки тому +12

      @@matthewminucci5649 a device that generates an intense beam of coherent monochromatic light (or other electromagnetic radiation) by stimulated emission of photons from excited atoms or molecules. Lasers are used in drilling and cutting, alignment and guidance, and in surgery; the optical properties are exploited in holography, reading barcodes, and in recording and playing compact discs.

    • @android01978
      @android01978 4 роки тому +34

      LASER is an acronym for Light Amplification by Stimulated Emission of Radiation. So is only related to light.

    • @pedroff_1
      @pedroff_1 4 роки тому +11

      As others already said, it fails at every step of the strict definition of a laser. Still, it has many laser-like properties indeed, I find it fair calling it a "sound laser". I mean, if hippopotamus means "water/river horse", I don't see why this wouldn't be valid

  • @robbi5449
    @robbi5449 6 років тому +2

    jedi sound saber, May the ultrasounds be with you

  • @gendragongfly
    @gendragongfly 2 роки тому +3

    The air absorbs the ultra sonic frequencies, because the heavier molecules can't move as fast as the lighter ones. This slows down the small waves and they collide forming a bigger wave of a lower frequency. This bigger wave can travel trough air more easily because it has more energy. The result is an audible frequency if this frequency was modulated into the original ultrasonic signal.

  • @MrMilarepa108
    @MrMilarepa108 6 років тому +1

    I wanted to do this FOREVER but I was afraid of the math!!!!! THANK YOU!!!! SUBSCRIBED!

  • @chepulis
    @chepulis 6 років тому +29

    Ventriloquist's dream

  • @Mosfet510
    @Mosfet510 4 роки тому +1

    This is a great twist on sound. I'm going to build this, thanks!

  • @realcygnus
    @realcygnus 6 років тому +6

    I wanted to make such a device since I had 1st heard of the phenomenon, like 15+ yrs ago. There was very little info available. Just use a mic at the input to F with ppl at the mall from afar, make them think they're hearing things etc. way cool

  • @xiao2634
    @xiao2634 2 роки тому +1

    In one episode of Knight Rider, KITT played a sound behind the enemy to distract him, though KITT was physically in front of the enemy. I wondered how that was possible. Now I see it is possible. You could make a device to do that and used it to distract kidnappers so that the snipper can make a quick shot.

  • @dlfon99
    @dlfon99 5 років тому +3

    Imagine a horror attraction feeding scratching sounds into this and pointing it all over the walls so it's like something invisible is traveling the walls of the room.

  • @jonah4196
    @jonah4196 6 років тому +1

    This is fascinating. I feel like this could have some really cool applications

  • @tarashrust
    @tarashrust 6 років тому +5

    i have made one of this like 4 or 5 years ago, for my university research, but there was to muck noise. There is video called "audio spotlight' or something like that, where this effect explained more detailed. Actually its an old technology, first of thos were invented in early 50s.

  • @Syrusoo
    @Syrusoo 6 років тому +1

    That's awesome this is the first video of yours I watched look forward to more.

  • @MC-xg9fv
    @MC-xg9fv 3 роки тому +4

    Does anyone know what would happen if the carrier wave had a lower frequency, say 35kHz? Would the modulated wave penetrate through paper better?

  • @fatguy338
    @fatguy338 4 роки тому +1

    This defies the reality I've experienced so far, cool!

  • @dunodisko2217
    @dunodisko2217 2 роки тому +20

    This reminds me of the “shut the fuck up cannon.” Its basically a directional mic that’s aimed at a person or rioter or something to record their voice and play it back with a 0.5 second delay. For whatever reason listening to your own words with a slight delay is really disorienting and it causes the person to slur their words together, slow their speech, and eventually make them do what the name implies.

    • @Legionmanchild
      @Legionmanchild 2 роки тому +1

      Do you have a link or source to any info about this? I googled but didn’t find anything.

    • @johnmichaels4330
      @johnmichaels4330 2 роки тому

      I hate when the car bluetooth is off. It's so distracting.

    • @meatwad420ish
      @meatwad420ish Рік тому

      This has been done to me in my own home for about 2 years now.

  • @maxheadrom3088
    @maxheadrom3088 2 роки тому +1

    It's a relationship between frequency and size of the transducer - that's why we use those folded tweeters the guys at Infinity invented.

  • @okboing
    @okboing 4 роки тому +3

    I was always fascinated by the idea of a sound-based communication system between two machines, like a remote control car controlled by high-frequency sound

    • @neglectfulsausage7689
      @neglectfulsausage7689 2 роки тому

      just because you cant hear 400khz controller frequency doesnt mean its not a sound wave.

  • @tknewyork18oo29
    @tknewyork18oo29 2 роки тому

    I love ppl like this.. Making the world Better one idea 💡 at a Time..

  • @paleknight1
    @paleknight1 5 років тому +4

    You have created the spell, "Send Message!"

  • @atom2319
    @atom2319 4 роки тому +1

    Best project bro... Explained everything i needed...

  • @benjaminlum5894
    @benjaminlum5894 4 роки тому +3

    Well, laser is actually an acronym. Quote from wikipedia, 'The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation".'
    So, maybe this is more of a.. "sasvf", "Sound Amplification by Stimulated Vibrations of a Fluid". I chose "fluid" instead of "air" because theoretically it may operate in water too, or just any gas or liquid :p

  • @christianmontagx8461
    @christianmontagx8461 2 роки тому

    A similar aproach was made by a manufacturer about 30 years ago. It was a cool time when they tried a lot of cool stuff (Folded Membranes, Plasmaspeakers, high frequency switching subwoofer amplifiers etc.)

  • @Zatore_
    @Zatore_ 6 років тому +12

    Does increasing / decreasing the carrier frequency have a significant impact on sound quality?

    • @CodeParade
      @CodeParade  6 років тому +14

      I only have 40KHz speakers so I haven't tested anything else. But I've heard that higher frequencies are more directional, but the volume decreases more quickly with distance, so you can't project it as far.

    • @BigOlSmellyFlashlight
      @BigOlSmellyFlashlight 6 років тому

      is this why am radio can be transmitted so far

    • @BigOlSmellyFlashlight
      @BigOlSmellyFlashlight 5 років тому

      oh ok

  • @4.0.4
    @4.0.4 6 років тому

    Man, I'm glad I found your channel. So many cool projects!

  • @EthanCGamer
    @EthanCGamer 6 років тому +11

    Do you happen to have a component list for what you used? I'd like to try this out for myself

    • @CodeParade
      @CodeParade  6 років тому +8

      All the major components are listed at 1:18 The passive stuff is just standard off-the-shelf parts. The only thing not listed that I added later is a large electrolytic capacitor between the output of the LM7805 to ground because the current spike from the speakers would cause too much voltage drop. For the speakers, any "ultrasonic transmitter" will work, just make sure they have a nominal frequency of 40KHz.

    • @EthanCGamer
      @EthanCGamer 6 років тому +2

      @@CodeParade Thanks!

    • @GigsTaggart
      @GigsTaggart 6 років тому

      CodeParade what transducers are those?

    • @CodeParade
      @CodeParade  6 років тому +1

      I got them a long time ago so I don't remember the exact brand. It might have been these ones:
      www.amazon.com/dp/B01FDGTXT4/

  • @paulawillaminachandler-ren3725
    @paulawillaminachandler-ren3725 2 роки тому

    That is so cool... Ha ha ha ha... I bet you thought I was talking about the device? No! They've been using that on us in the supermarkets for over a decade now. I'm fascinated about that swollen capacitor you're using in the circuit.

  • @СмещённаяАктивность
    @СмещённаяАктивность 6 років тому +11

    Cool! To get better results you need to make phase-shifting delays for ultrasonic drivers instead of this type of modulation...

  • @Poly_0000
    @Poly_0000 6 років тому

    How are you so amazing at this?
    Please never change. Your content makes me so happy.

  • @jesselin1665
    @jesselin1665 6 років тому +5

    Very interesting concept. I wonder if this has potential in movie theaters or VR set ups.

  • @bradleywalters2335
    @bradleywalters2335 6 років тому +21

    Now to turn this into a rotating "soundhouse"

  • @melody3741
    @melody3741 6 років тому +1

    This is some brilliant engineering tbh

  • @violetemmott982
    @violetemmott982 6 років тому +5

    So it's basically the "throw voice" shout from Skyrim XD

  • @iridium9512
    @iridium9512 6 років тому

    This is fascinating. Thanks for building this so that we may see.

  • @Architector_4
    @Architector_4 6 років тому +7

    Wow. If I had one of those, I'd most definitely use it for trolling in school.
    :v

  • @tf3confirmedbuthv54
    @tf3confirmedbuthv54 4 роки тому +1

    Good video check list.
    1. Codeparade
    Check
    2. Cool hobbyist electronics
    Check
    3. Physics
    Check
    4. Lasers
    CHECK!
    Edit: CodeParade, Please, Please, Please do more electronic videos, or just video similar to this! I love it

  • @keereelewah4524
    @keereelewah4524 6 років тому +33

    Just one question: the frequency domain of a square wave is rather nasty, with many, many high-order harmonics. Have you tried and had success with using a sine wave rather than square? It would complicate things but you'd have a different modulation

    • @Spritetm
      @Spritetm 5 років тому +23

      Probably makes no difference. These ultrasonic transmitters are really only sensitive to 40KHz, +/- a few KHz or so. The first harmonic of a 40KHz square wave is (iirc) at 120KHz, which elicits almost no response in the transmitter.

    • @fahdal-sebaey3322
      @fahdal-sebaey3322 3 роки тому +12

      @@Spritetm to rephrase, the speakers filter the square wave.. which yields a (near) sinusoidal wave.

  • @samuellourenco1050
    @samuellourenco1050 2 роки тому +1

    Nice! Works like a LASER would.

  • @frankelliott244
    @frankelliott244 Рік тому +1

    Surfaces that have both elasticity and dampening will demodulate the ultrasound to make the signal audible. Those surfaces can't keep up with ultrasonic frequencies. So, they absorb the ultrasonic part of the signal and emit the audible part of the signal. However, the surface amplifies the audible signal using the energy from the ultrasonic part. This works for walls and ear drums.

  • @gerarddip
    @gerarddip 4 роки тому +3

    I think they had one of these at a local Best Buy on a video game demo setup. I always wondered how it works!

  • @marcobotha8866
    @marcobotha8866 6 років тому

    I have heard about this on tv about two years ago but never knew what it was as i wanted to build one.
    Then I found this video and going to try it.

  • @karuso5271
    @karuso5271 4 роки тому +5

    Since Laser is short for Ligth Amplification by Stimulated Emission of Radiation, this should be a called "Saser"

    • @seditt5146
      @seditt5146 3 роки тому

      No it shouldn't because this does nothing of the sorts and is not even close to being like a laser. Sasers do exist but are so damn hard to research because of all the bullshit people put out as sound lasers. Sasers function in insanely high ultrasound frequencies such they are able to create plasma on contact with metal surfaces in some cases. I currently am considering construction of something that might operate like a real laser using clusters of specifically spaced, sized, and arranged spheres in hopes I can get frequency and phase coherence same as a laser without doing the insanity that is needed with cooling and ultrafine metal powders and rods of sasers. Only problem I forsee is potential size I might need but each object would have harmonics which need to resonate with a base tube such that they all pump a single frequency/phase.

  • @seandonelan5834
    @seandonelan5834 2 роки тому +1

    as soon as i saw those vex chassis parts i knew this was good

  • @XZYSquare
    @XZYSquare 6 років тому +3

    imagine adding bluetooth support and putting the lazer in a classroom where you could make it sound like the whiteboard is talking. you could do good and bad things with this. :)

  • @muhramdhan7013
    @muhramdhan7013 4 роки тому +1

    Underrated channel

  • @DeusEx3
    @DeusEx3 6 років тому +6

    Idk, sound seems to come out of my speakers.
    Seriously though, I came here for the game related stuff and now this? Some serious set of skills you've developed 🙏

  • @mudfossiluniversity
    @mudfossiluniversity 5 років тому +1

    Sound is only bumping molecules not fast enough to be light but almost in your case...it is like slow light.

  • @isettech
    @isettech 2 роки тому +5

    Laser is the wrong term for that. The Phased array is more of a spotlight with a focused beam from emitters, not a medium that is stimulated to increase radiation of sound or light like a LASER. This is more correctly identified as a phased array as used in military radar and other directional sound and radio devices. This focuses sound like a phased array, not a LASER. Unlike a LASER, the array can be phased for receiving with directional pickup. This is sometimes used in sports stadiums.

    • @rorypenstock1763
      @rorypenstock1763 2 роки тому +1

      I came looking for this comment.

    • @aceg81
      @aceg81 2 роки тому

      Is this a phased array, though? I was under the impression that the collimation came from the fact that it was operating in the ultrasonic frequency range. I didn't hear him mention anything about adjusting phase (though I imagine that might let you scan this around without moving parts, which would be uber cool).

    • @isettech
      @isettech 2 роки тому

      @@aceg81 If the phase can be adjusted, then it is steerable. A line array, all in the same phase is also a phased array. As such, the array makes a narrower beam than a single element alone.

  • @illuminated2438
    @illuminated2438 2 роки тому +1

    Allegedly there are agencies already working on this.
    You can aim focused mechanical waves at a person, and the waves interact with the skull and resonate such that he feels like he is hearing a voice which no one else can hear.

  • @Jordan-jn1vj
    @Jordan-jn1vj 6 років тому +4

    This is other wise known as a sonic screwdriver from Doctor Who

  • @pierpa_76pierpaolo
    @pierpa_76pierpaolo Рік тому +1

    These capsules say "T" (TX) and "R" (RX) on them, but they are practically identical and are operated through special ICs (such as the HC-SR04 module). I am interested in the suppressor schematic and now have to look for all the components as soon as possible. Thank you very much.

  • @JuanSeveso
    @JuanSeveso 6 років тому +10

    You could cheat on tests with that, multimillionare idea IMO

    • @Adecker100
      @Adecker100 4 роки тому +2

      If you're able to sneak that into a test without anyone noticing, I don't even think you need it...

    • @wowalamoiz9489
      @wowalamoiz9489 4 роки тому +1

      @@Adecker100 I think the idea is someone outside the class projecting the answers into your ear.

  • @Kuba87687
    @Kuba87687 6 років тому +1

    Your channel is so so underrated

  • @TheDutchFighters
    @TheDutchFighters 4 роки тому +5

    So if you put a high tone on it, you have a anti neighbour's cat laser. Awesome

  • @yashovam
    @yashovam 6 років тому

    You again? Dude, your like my new favorite inventor.

  • @darkraven4187
    @darkraven4187 6 років тому +26

    Just a small note, you said "laser" and I had to watch the video twice because I got confused, but then I did some reading and think I understand the Physics of this device a lot better now.
    Calling it a "laser" is inaccurate. It's still a longnitudal compression wave (sound), not an electromagnetic wave (light). To understand why it works this is an important distinction. Sound is caused by the compression and decompression of air. (sound vibrates in the direction that it is travelling). The deliniarisation effect is caused when the sound travels at different speeds when it's more or less compressed. These changes in speed lead to a bigger wavelength sound being created over the top of the ultrasound, because of harmonics. (The waves line up to create a new sound)
    This isn't how FM radio works, or even AM radio, even though it is a modulation effect. Radio is in the world of electromagnetic waves, which do not have this effect as they vibrate in a different direction to the one which they are travelling.
    Also, Subscribed! Love your stuff!

    • @noatreiman
      @noatreiman 6 років тому +7

      Obviously it's not electromagnetic in nature, it's just an analogy.

    • @GewelReal
      @GewelReal 6 років тому +8

      You may be smart, yet you are dumb

    • @maxwell_edison
      @maxwell_edison 6 років тому +3

      He's got that too literal problem
      He meant laser as in reference to turning a wave into something that fires extremely straight. Laser is an approachable comparison, of course it's not a literal light laser. People use the term laser as a catch-all to describe super accurate things a lot.

    • @bormisha
      @bormisha 6 років тому

      It was a clickbait. And it worked!

    • @mateuszkaplon
      @mateuszkaplon 6 років тому

      ​@@maxwell_edison Still, calling that device a "laser" is *extremely* inaccurate, since it gives the idea that the phenomenon of lasing produces focused light, while in fact, it *doesn't have to* and the only reason lasers often do so is because of using a dedicated optics to focus the light beam.
      Lasers are lasers because they produce a coherent light wave of a single frequency. That's it. So even analogically, the device built in this video has literally *nothing* to do with a laser. It would when the sound generated by the device consisted of only a single wave frequency (which, in terms of sound, is not a hard thing to do at all, in contrast to light waves). Also, the process of generating light inside a laser (a.k.a. "lasing" or "laser action") is caused by a very specific physical phenomenon that involves a medium amplifying light waves sandwiched between two reflective surfaces. Is that possible with sound? Yes, probably. But likely not anywhere near the range of audible frequencies (rather mega/gigahertz). And not in gas-based media.

  • @stevenmayhew3944
    @stevenmayhew3944 4 роки тому +2

    I understand that that is how LRAD works. The military uses it to make an uncomfortably loud ear piercing noise which only the intended target can hear while everybody else is safe so that nobody dare get too close to base or ship. They can also use it to psych the enemy by making it sound like there are tanks and helicopters within their personal space when the sound is from a mile away, really.

  • @playbabethebookshelf6249
    @playbabethebookshelf6249 6 років тому +3

    Oh cool, we can make people freaking out with this technology.
    #shoot creepy whisper sound into the walls

  • @OskarP2601
    @OskarP2601 2 роки тому

    i can’t lie this is rlly cool

  • @sutsuj6437
    @sutsuj6437 6 років тому +4

    Good video would like to try it out but I don't have equipment -_- and money to buy it ...

    • @CodeParade
      @CodeParade  6 років тому +4

      You don't need to have 30+ speakers if you're worried about the cost. It even works with only 1, though much quieter.

  • @robertfennis6088
    @robertfennis6088 6 років тому +1

    The reason that smaller wavelengths bundle better is because to get a small beam you need to sum multiple spherical wave fronts together with the right phase relation. But then the beamwidth must be at least several wavelengths long so the more wavelengths you have the more bundled you can get your beam. When you get down to the order of magnitude of 1 to 5 wavelengths or so it stops being noticably bundled. This is also why parabolic reflectors must have a diameter multiple times the wavelength. Otherwise you just get diffraction.

  • @funkysagancat3295
    @funkysagancat3295 5 років тому +6

    2:19 you can make it look like someone is farting

  • @AbhayKumar-ze1bn
    @AbhayKumar-ze1bn 5 років тому +3

    can you please give the detail for construction of this project

  • @lucywucyyy
    @lucywucyyy 5 років тому +7

    point it at someone and play a fart sound and watch everyone think it was them