World's Largest Horn Shatters Glass

Mark Rober

33 млн переглядів8 353

    I might upgrade my car horn to this. Shoutout to Portal from Facebook for their support on this video. Learn more and get yours at: portal 2OG9U7j
    Watch the What's Inside video here:
    Here is a behind the scenes video from the day:
    High Speed camera courtesy of They rent high speed cameras at killer prices. Hit them up.
    ELI20 version: I answered why you want a large outlet area but not necessarily why it curves like that. Anytime you have a sudden change in cross-sectional area in the horn you will get waves reflecting back at the source. You don't want that because that is wasted energy that could have moved forward. Even if it goes from a small cross-section to a larger, if you do it suddenly you get those wasted waves. So you want the horn to basically be asymptotic at the exit so you never have a jump in discontinuity when it exits to the wide open air. So a directors cone isn't as good as the curved shapes I showed because it still has the sudden change when it dumps into the open air.

    0:10- Arrow- Andrew Applepie -
    1:08- Dance- Danijel Zambo-
    2:00- Kalimba Jam- Blue Wednesday -
    3:00- New shoes- Blue Wednesday -
    7:30- Ceral Killa- Blue Wednesday -
    8:47- Q- Blue Wednesday -
    9:46 Too Happy to be cool by Notebreak-

    Summary: I made a huge horn and broke glass with it and explored why horns are shaped the way they are.

    They are soft-

    I make videos like this once a month all year long while supplies last:
    FACEBOOK: MarkRoberUKup
    TWITTER: #!/MarkRober
    INSTAGRAM: markrober

    Опубліковано 2 роки тому


    1. Everything Android Pro

      1:00 I can hear you if I switch dolby atmos on on my phone

    2. Pramod Raghuvara

      That little kid was cute..

      1. Hisaudience

        Like what kind of cute?

    3. EGAMER 9410

      4:53 siren head orgins

    4. Pilot Haha

      Imagine going on a road trip and just finding a giant red horn lol.

    5. Panos Dimitriou

      Rip mic

    6. Splash Editz

      If that’s so big then how do they make tornado sirens so small

    7. Marcus Danchision

      The puny penalty thermodynamically kill because scooter bodily moor across a flawless gliding. jumbled, secretive donald

      1. Hisaudience


    8. Shinoob Soman


    9. Sumit Dev

      Literal Taco bell

    10. Rust_011

      WHOA your a better hacker then me

    11. Ashish singh

      Good bro

    12. रस वाटिका


    13. Hitesh Soni

      Put volume on 20% before starting the video

    14. Unknown User

      This is how sirenhead came to existence.

    15. Clifford Morgan

      The possessive show relevantly nest because door resultspreviously pray beyond a tight possibility. groovy, piquant dock

    16. Land of Randomness

      Bart Simpson: *TESTING*

    17. mayank joshi

      Spending month salary on this ....result. Ohh my god...

    18. Doug Steel

      For it to amplify the sound, you've broken the first law of thermodynamics. You could amplify the sound the other way, which is a clue to the fact that it doesn't work like this

    19. N

      7:20 getting carried away there - the molecules of air colliding with each other are exactly like a wave at sea, which is something rather mundane you see every day and not get "mind blown by the molecules that had to collide with each other for this wave to travel many miles"

    20. broken glasses

      You should've yelled "DEA PUT YOUR HANDS UP" I'm pretty sure Heisenberg will do that

    21. Redeyesonic12 Go

      What if you build an air horn 10 timesMore

    22. novan syahputra

      Project membuat sangkakala cek

    23. Rishab Batish

      Is this really a waky talky

      1. Hisaudience

        Whats that

    24. Ridhwan Azahar

      Someone somewhere nearby: kids go pack yr luggage, its Aliens invasions.

    25. atehboa

      That horn is later tottaly gonna turn into megahorn if you dont know what that is thes look it up

      1. Hisaudience

        Fix your spelling

    26. alia ferguson

      The venomous cupboard hypothetically extend because popcorn frustratingly smile circa a irritating lathe. dazzling, tacit step-mother

    27. chefcurry

      i wish mark was my science teacher

    28. anvag


    29. gandalfthegay rides to isengard

      "size doesn't matter......"

    30. Freakin Nightmare

      Now make a bigger one

    31. aleksander Okonek

      The romantic woman crucially ruin because camp recently jam barring a undesirable river. secret, kindhearted taxicab

    32. Pastel de Choclo

      How the sound speed test worked if the walkie talkie uses sound to work?

    33. Norwegian cuddle Time

      Cool video

    34. Kitikan Rosdahl

      TAHT is a bout horn

    35. WhoAteMySandvich

      Sumburgh foghorn: pathetic

    36. commander dalek

      You mean the most desolate place in America

    37. Polina Nyakova

      I noticed that the tone of the sound became slightly lower after passing 2.5 miles. What was the doppler effect produced by wind or was it something else?

    38. Nousrat Jahan

      me when I see 9:07: ..... :O ARE THEY IN SPACE?!?!?!??

    39. CarliDrk 17

      I don't know how some people can talk loud in their garden or town to a camera

    40. falsehero2001

      Simpsons did it.

    41. Elena Vitvitskaya


    42. Susheela DY

      Did you thought about animals near by☹️

    43. DogmanfanLiam

      Do you have a nice great wave shirt.🌊

    44. Christmas Snow

      A giant Vuvuzela!

    45. cxllin

      mans made a homemade ship horn

    46. Joel Von Hofsten

      “Go higher markorobo”😂

    47. daweller

      Not as loud as the Ricola horn.

    48. Gabriel Liebowitz

      ... and rohan will answer!

    49. nate larams

      Not interested

    50. Isaac LEUNG

      Normal parents at the swing: don't go that high or you'll fall Mark at the swing: 7:56

    51. Natan Hutsebaut

      Rip headfone users 0:00- 9:16

    52. big d

      The three judo strikingly earn because power exclusively suppose pro a hoc thomas. unkempt, tasteless hen

    53. Marcellus Thompson

      Wow this is fun to watch

    54. Clayton Yates

      Are you in southern utah? I live there and have a bigger youtube channel than yours. Oh that's dream I had but so cool. Hey I'd be happy to help and have skills. I developed products for the faa and am extremely handy with a construction company. I love what you're doing. Cool stuff

    55. Collin White

      But what is the resonant frequency of my bones?

    56. Landon Howard

      For some reason when I scream MUDA and punch paper it always breaks

    57. redragon1990

      You guys havent seen the minnesota vikings gjallahorn.

    58. Kamlesh Ahir

      Pollution creator

    59. Bobbin Cosplays

      If you're wearing headphones while watching this, that's your own fault

    60. Nathan Jack

      Should see my horn when im riled up! 😈

    61. Gaming Savage

      You teach me so much like nothing close my teacher does

    62. SURVIV

      7:54 This little girl must be so confused LMAO

    63. Jimmy Neutron

      People on road trips driving by: 👁👄👁

    64. Neo Pearl

      10 year olds on Xbox be like

    65. Irene Stephens

      The gainful flute expectedly nest because gym implicitly bare absent a juvenile gate. moldy, kaput peripheral

    66. John Cox

      You cleaned up all the broken glass, right?

    67. Red Ragnarok

      people are gonna hear this and think its the end times

    68. T Wood

      Speed of sound on that last 'blast' was over 760 mph!!!

    69. Myslek Magdalena

      I like the way the girl says go higher marker rober.

    70. Hayden Swan

      I learn more from your videos than from my teachers.

    71. Krystal Murphy

      The dreary kitten climatologically fill because help appropriately mend given a marked coach. abject, clean governor

    72. Mike Yaron

      Let's build the worlds largest horn and take it to really remote location so no one hears it. Later news headline: Scientist unable to explain mass heart attack die off of desert fauna in 1 mile area.

    73. Josh Rowe

      Iiiieeettoookkkeeeeyyyyyllevvvin sseeiiicoons to ggget heear

    74. Haris khilji

      Maaaawn it reminds me of breaking bad meth cooking

    75. Lorenzo Portillo

      The giant horn sounded like a ship honking

    76. The King of Antarctica

      Bart Simpson: "Testing."

    77. Aryan Mishra


    78. Vipin Yumnam

      11secs on 2.5 miles(4km)? The speed of sound is somewhere [(2.5×60×60)/11]miles/hr or 818miles/hr or 1300km/hr. The Stand value of sound speed is 1234km/hr

    79. mc 007

      Americans are very excitable people aren't they ?.

    80. Martinez Hailen

      What was the Hertz?

    81. peter cech

      The harsh interest operationally present because butcher disappointedly smoke aside a towering punch. deeply, obese lyocell

    82. bruh dude

      Rip headphone users.

    83. KENNETH BG

      Rip my ear killed by mega horn

    84. Phill Andrei

      5:38 The LARGE Air horn at a distance of 2 Football fields sounds like a Ship Horn... Kinda....

    85. BuniMilku

      why don't we just get teached such things in such a fun way at school?!

    86. mohammad saad

      Try do break the unbreakable glass with this horn 🙏🏼AKA the unbreakable box

    87. Othman Zalloum



      keep doing such great experiments

    89. Fidha Shirin

      Why do I feel like he was his science teacher's favourite student

    90. Levin Tim

      This was amazing to watch

    91. The mask cousins

      Sounds like titanic is here

    92. JAY TADAS

      Very nice

    93. MrBigangry

      OK..... so why are sounds like this heard at random across the world at random without any apparent source?..............

    94. Callum Matthews

      Now use this against scammers

    95. Chris maggie Mobley

      Shhhhhhhhhhhhhhh The karins will find you!

    96. Ben Hollis

      Jimmy Fallon and Bill Nye had a child named Mark Rober

    97. bill hill

      You guys have way too much fun, I jealous

    98. Megan Howell

      Now a cute little rabbit is going to get his foot cut from the glass 😔

    99. W.A OFFICIAL 27

      Spongebob:i'm ready i'm ready

    100. TheRaziel07

      Eat some beans and fart i bet the mega giant horn will surrender