World's Largest Horn Shatters Glass

Birt 28 nóv 2018
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: MarkRoberISchats
TWITTER: #!/MarkRober
INSTAGRAM: markrober


  • god this makes me so happy you guys have beautiful energy

  • did you clean all the glass out of the sand ?

  • smart

  • Tug boats. Haha ha ha hahaaa its the second time around mtfks .ride or die volume two !! Biyches. Young won atl shawty! Dam right

  • AaAaAAaaAaAaaaaaAAaAaAAaAAA 7:26

  • this is how mega horn was made

  • When you hear it and you see a GIAGANTIC WAR SHIP HEADING YOUR WAY: Crap

  • 6:53 sounds like a boat horn.

  • Certainly the horniest video I've seen all day.

  • The largest horn is in Titanic we can hear them among 15km

  • Bro idk u said

  • The horn on it looks like a thunderbolt siren

  • You are sooo cool

  • If you had a horn in your neighborhood, what would you do with it?

  • I showed this to my teacher and she showed it to our class because we were learning about sound. One of my classmates said you explain things well and another said he saw it already.

  • A like yuo gu j

  • Give that to a NHL team lol

  • i was wearing headphones >:(

  • 4:03 Oh god no

  • Anyone here in 2021😉

  • I have a wife who can do the same thing if you piss her off enough.

  • yes please upgrade your car horn to this

  • Finally, a worthy opponent, our battles should be legendary!

  • Where is it tell me I’m going from Middle East to see it

  • “You can even hear me whisper, it’s creepy.” Mark: **Says it in a deep voice** Me: 0.0

  • big monster horn, what!?!?

  • Guy: Drives in desert Also guy: *Hears Horn* Also guy again: Theres wars in America too?! That's the whole reason I left my country!

  • Bruh?

  • My headphone on max let me hear from the other side of the room. I don’t want to know what this sounds like on max

  • Ms. Trina

  • What

  • Me listening at 100 volume because their voice is low: Mark Rober: 6:39

  • Ist's a Shop horn

  • Who else thinks that that thing sounds like a cruse ship

  • that is spongebobs alarm lol

  • I think its because of an air flow

  • U know the Hornig sound like a Hornig from a boat and i Dont like it

  • High pitch & low pitch 🤣🤣🤣love the way u said

  • And that's how the fog horn was made

  • Sponge Bob alarm

  • me:explains sience in 2 hours mark rober: exlains sience with jelly and in 3min

  • this could be louder than spongebobs alarm

  • The fact that mark forces you to learn by leaving you on a cliffhanger on how it sounds and makes you learn about the ear

  • 5:06 the kid nearly trips lol😂


  • The big horn on Cunard's Queen Mary 2 can be heard 10 miles away. You can do a ISchats search for it.

  • Daddy what was that? It was the ghost of the lost cargo ship

  • Woooow

  • This is really loud

  • In the description: I might upgrade my car horn to this Me: This is why you don't f*** with him while driving unless you want to go deaf

  • okay okay i just thought of something okay do a video about is swearing really bad?

  • "Waawww that's so cool" 🤔????

  • น่าติดตาม

  • I dare you to put your volume to max

  • .

  • would be nice to cooperate with slow mo guys to record glass breaking... But 2 years...)))

  • The horn sounds like a 9p1950s diesel locomotive horn

  • Cool

  • Mark Rober: Hey babe, wanna see my horn ; ) Thot: Sure, sounds great. Mark: Yeah it does sound great! It'll rock your world. Thot: Wow, can't wait :D Mark:

  • he prob caused an earthquake

  • 4:51 R.I.P. people with headphones with a high volume.

  • 4:03 Its time for my brain to take a bath!

  • If u drive close with ur car front windshield it would break too

  • I am statistic lover If you are from milddle class family Please help me built my channel I upload videos daily🤞

  • 🚢⛴️🛳️⚓

  • Me: falls asleep on music Mark Rober: BRRRBBRBRBRBRBRBRRRRR

  • Use a compression driver and check its bass response. It should be a great subwoofer.

  • Mark Rober makes science so cool.

  • Au top

  • 👍

  • Oh nice 2 years Later i hear it from Austria 👍🤔😂

  • imagine being his labor and chillin outside and hear "you can even hear me whisper"

  • Is hold consider subscribing if it weren’t for that vegan burger crap.

  • May that explains the apocalypse trumpets sound that occasionally people hear in different cities XD



  • omg i turned captions on when the music was play and it said [some cool music] :)

  • Yeah science! It’s from breaking bad if You didn’t know

  • You know what is faster 😉 The speed of glass breaking at a high FramesPerSecond

  • Omg you broke my ear I had headphones

  • L O V E 360z 😘 04:41 07:00 😉🤩😍👏👏👏👏👏👏👏 🌅👏🕊️🦅🐥❤️❤️🐥🦅🕊️👏☝️🌄🌞

  • In a village like 100 miles away 200 years later why was there a ship sound

  • undertale - minecraft meme (spoilers) Papyrus: SANS! WAKE UP! sans : sleeps* Papyrus : SANS! WAKE UP OR I AM USE MY SUPER POWER! sans: not wake ups* Papyrus: *This Video* * sans: WHAT THE F- Papyrus : leagu-- BadBoyHalo (Minecraft: Dream Team) : *Comes Nether Portal* * BadBoyHalo: who summoned me? minecraft font but undertale chat: BadBoyHalo banned by toby fox papyrus: oh wow...

  • Bhaiyon mere ko bhi support karo

  • Goku has left the chat

  • اوف اوف

  • These things looks cool in experiments ! But in theory it sucks!

  • Rip headphone users at high volume

  • Who's Here In 2021 🔥

  • I don’t know anything about what he is saying

  • science fact: sound waves travel one mile in 5 seconds!

  • 4:52 rip headphone users

  • Me: Hey! My friend: Huh? Me:HEY! My friend: huh? Me: *pulls out le epic megaphone* HEeeEeEeEeY! My friend: huh?

  • You made a ships horn kind sir

  • Bass

  • "Sounds like a boat horn"

  • I like it so good job mark

  • If I'm not wrong, the place they tested the horn is actually an old cancelled city. Close to Las Vegas. it was meant to be one of the biggest cities in all of America. That's why you can see roads and everything. the city is actually still there. But the desert was an Expansion to the city. The place is called California City and you can check it out still.

  • What a wake up call alarm system for assembly

  • Tacoma bridge was not resonance, it was Hopf bifurcation