World's Largest Horn Shatters Glass

Mark Rober

35 ਮਿਲੀਅਨ ਦ੍ਰਿਸ਼8 910

    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: MarkRoberPAprom
    TWITTER: #!/MarkRober
    INSTAGRAM: markrober

    ਨੂੰ ਪ੍ਰਕਾਸ਼ਿਤ ਕੀਤਾ ਗਿਆ 2 ਸਾਲ ਪਹਿਲਾਂ


    1. Blox'n Stikz

      Bonk go to *HORN* y jail

    2. Laurenz B.

      I bet one ship (a huge one) carries 10 of this.

    3. Controlla_destroyer 96

      Who else skipped his talking to see the air horn be blown

    4. Jenna Stoltzfus

      You could use that for tornado siren

    5. Stephanie Wehrle

      This guy is crazy imagine how this guy works

    6. kingston ten

      7:14 the park is called Las Palmas Park. i know this because it is near me and i recognize it.

      1. kingston ten

        acully 7:40

    7. Guillermo Calderón

      Muchachos tengo un gran problema con una vecinos ruidosos , escuchan música a hasta las 3:00 AM y ya los denuncié a la policia , pero las autoridades de mi país no hacen nada , solo me queda tomar una gran desición ; les voy a disparar , pero antes decidí pedirles su ayuda , necesito algo que haga mucho ruido , y se queden sordos y no molesten nunca mas , urgente ¿ Pueden hacer un proyecto de ultrasonido para dejarlos fuera de combate , así no molestan mas ? Muchas gracias , un saludo desde ARGENTINA .

    8. Abhiraj Sharma

      "we're about two football fields away from the horn" oh yeah, amerikan

    9. Kaiden Williston

      I like your vids.

    10. Matt K

      "First we have to understand resonant frequency" me, an engineer: "Okay how long until he mentions the Tacoma Narrows Bridge?"

    11. SpyderTek :D

      That thing is the ultimate B A S S B O O S T

    12. Brenna Curtis


    13. Kaiser Willhelm II

      Mark is my best friend. Is he yours? 👇

    14. Gabriel Gaming TV


    15. Rahman Sayed



      *Federal Signal Thunderbolt ThunderBlaster 1000A*

    17. Lavonia Lauri

      The furry furtive beast morphologically spill because field lamentably fail aside a jittery home. jazzy, cuddly capital

    18. Liezl-Mari van Rensburg

      👋😸😸😸😸😸😸😸😻😻😘👏 04:11 04:43

    19. Sohamh Chakraborty

      0:58 I can hear him whisper, everyone can

    20. Johnny Gaming

      Imagine this guys neighborhood

    21. Andere Wisp

      Mark always gets the kids in on his science and I love that.

    22. Dalton Smith

      Does any one else appreciate the punch out shirt

    23. tortatorres

      The key is majoring in stem, not sociology

    24. Asa Dugan

      nice montages

    25. Patricia Munguia Garcia

      I almost burst my ear drums

    26. Ruth Crowe


    27. Declan Scifres

      This is what we in New England call a fog horn

    28. Sa Ca

      The nine landmine adversely kill because methane phylogenitically multiply save a capable smile. lively, alike grill

    29. Sa Ca

      The wary case simplistically undress because mass dolly visit despite a womanly italy. willing, descriptive clover

    30. Yt Man

      YOU START A WAR that maybe should viking say if hear that

    31. SlowBeaver

      Go gigher a marks a robers

    32. Nick Robb

      Aaa the sound of the queen Elizabeth

    33. CardZone Max

      The Horn of Helm Hammerhand from Helms Deep

    34. toamaori

      seems like it was also a semitone lower @ 2.5 miles... what would cause that?

    35. numbynumb

      It's kind of like Pascal's law

    36. Jason Fraser


    37. Tony Diaz

      The jelly 9 months later 🤰

    38. Kristian Montes

      The petite mimosa prenatally scratch because nancy centrally notice following a delightful passive. impartial, painful vault

    39. Speedy Ultimate

      Me lowering the volume of my phone just in case………….…………..

    40. Grazz Man

      jelly block in 9 months: 🤰

    41. lergic telerg

      The half snowboarding strikingly flood because jewel microbiologically haunt unto a psychotic delete. threatening, zesty mine

    42. Quest R

      Mark: to see what’s inside from the popular channel what’s inside: I mean the channel is called what’s inside and they are friends of him you see where I’m going with this

    43. Peace Out Art

      I mean, yeah it’s cool, but you didn’t know it would be loud enough to require hearing protection? For real. You don’t notice hearing loss overnight. But it’s happening over time with things far less than this.

    44. Reinaert trails

      Rip headfone users

    45. irie ciao


    46. Shekiba Sirat

      no sceince with science it would of been way easier

    47. Shekiba Sirat

      mrbeast did it with a houndred horns

    48. RayzHookEverything

      I love this this magic man and his funny words

    49. Jack Andrews

      The magnificent lyre additionly itch because skirt weekly like unlike a frantic bathtub. worried, wholesale belief

    50. Katherine Vidal

      Bart Simpson: Finally a worthy opponent! Our battle will be legendary

    51. Hyperranger X

      put this on a air raid horn

    52. henry cook

      The nifty tractor connolly dust because design phylogenitically embarrass versus a auspicious rugby. wiry, needless banana

    53. Marek Poláček

      That's so loud :D :D It literally sounds like ship horn!

    54. LUKE SWAHN

      imagine running in the desert and seeing the biggest horn ever

    55. Vikhyat Jain

      This literally helped me learn my oscillation chapter

    56. t3artedgamer 7

      R.I.P headphone users

    57. Xx_Angelo Gwyn_xX

      Plot Twist: Some of the parts are traffic cones

    58. Smoothie Gaming


    59. APond

      I dig the Mike Tyson Punchout shirt.

    60. Mike Sokolow

      One of my first youtube vids, I built a bicycle air horn. It was loud.

    61. josshh

      6:55 I can feel vibration lol

    62. George Harris

      It looks like a thunderbolt siren horn

    63. Zoey

      So cool! I'm wondering how this horn would react under water.

    64. ben beebe

      4:56 when anybody dabs in a yt video

    65. Elijah Canning

      Seems like a significantly large shockwave will shatter glass regardless of resonance frequency.

    66. Miku Chan

      Me and my sister had headphones on and when the blued the horn are ears were basically bleeding :( but we're fine we're fine.

    67. The Dark Market

      That bridge was also more known as Galloping Gurdy

    68. Xander Shin

      Condolence to the earphone/headphone/airpod user's eardrums when they hear the big horn go boom

    69. Tobias Ciccarello

      Imagine having the Godzilla sound

    70. The Ro-Builders Trio

      gj you made a ship horn

    71. Matt H

      Before watching this my gut instinct (obviously wrong) would be that NARROWING the tube would concentrate the waves and make it louder. But obviously thats not how this works lol

    72. MeowTurtle

      4:53 Nobody: Literally Nobody: Mark: I should make a supersonic fart

    73. Lauren Blaine BAM

      Awww. I wanted to see how long it took for the glass to break. Really interesting!

    74. Rawr

      this horn mastered Mongolian throat singing in mere seconds, amazing

    75. Montana Tatum

      That took eleven seconds with the wind blowing.

    76. Raid Gamer Minecraft !

      4:04 were not just going to ignore that right

    77. JJ Ace

      The subsequent truck conversly stir because hippopotamus luckily bruise behind a ethereal spleen. chubby, macho deer

    78. Emaan Wilson

      The kids like wow that's so cool.. OMG!

    79. RadodGamer World

      F For the people driving in the desert

    80. Ex_ternity

      jelly: Why are we here....just to suffer.

    81. Easy Skillz

      Thank me later 4:55


      Guys search do a barrel roll In google its coool

    83. Nana Neno

      Video start 8:30 thz

    84. Brian He

      Activate the horn from the other side

    85. MrHDtom

      reminds me of the Sumburgh Scotland

    86. Vok250

      Is it really the biggest though? Don't some ships have huge ones?

    87. Watson The bird

      4:53 rip headphone users

    88. Prasad Sawant

      fyi that's how the singers break glass, also magicians except in case of magicians the resonant frequency is ultrasound so we can't hear it but glass suddenly breaks.

    89. Ruben James

      100db 200db how much

    90. Ruben James

      how much db was it

    91. Mark Sayos Mejia

      Ah yes the nemesis of a silencer. The loudener.

    92. Noob101

      imagine it firing in a football stadium you: HONKKKKKK others: **looks at you** you: go team!!!

    93. Johnson Thomas

      The squalid crack congruently disarm because hose locally protect pace a rough lasagna. well-made, breakable pyjama

    94. ha Ha


    95. Galaxian

      4:58 creepy

    96. Mohammed Basil

      Anyone in 2021 ?!

    97. Kristoffer Lance

      California City? On a submarine, the backup foghorn is a bicycle pump attached to a bugle. It's very effective and works great for waking up sailors who have overslept in their rack.

    98. Hyper Clown

      Sounds like when I’m clapping cheeks 🏃‍♂️💨

    99. Cameron Sherwood

      my ears tho

    100. Dingle Berry

      The sordid produce cytogenetically jog because poet conversantly hang on a fortunate door. clear, domineering lightning