A bang for a buck
July 25, 2009 8:06 PM Subscribe
What can I use to create a startling, loud, sharp noise?
I need to be able to conceal the source of the noise whilst in the presence of the person I wish to startle.
The noise needs to be louder than a cap gun (tried that).
In essence, the noise would need to penetrate an unguarded moment and engender an immediate state of 'startlement', a flinch.
I need to be able to conceal the source of the noise whilst in the presence of the person I wish to startle.
The noise needs to be louder than a cap gun (tried that).
In essence, the noise would need to penetrate an unguarded moment and engender an immediate state of 'startlement', a flinch.
Best answer: clapping 2 pieces of 2x4 together is pretty loud, I suppose you could conceal them or just have them sitting innocuously somewhere ready for use.
posted by clanger at 8:16 PM on July 25, 2009
posted by clanger at 8:16 PM on July 25, 2009
Best answer: a mouse or rat trap? i only say this because i am dealing with mice right now and hearing a trap go off in the middle of the night is definitely startling. also they're easy to hide. just a thought...
posted by janepanic at 8:16 PM on July 25, 2009
posted by janepanic at 8:16 PM on July 25, 2009
Best answer: Big sheet of metal. Have someone bang it. (You're going to have to figure out how to conceal it, if concealment is necessary.)
posted by ocherdraco at 8:16 PM on July 25, 2009
posted by ocherdraco at 8:16 PM on July 25, 2009
Response by poster: I can prepare it beforehand - I just need to ensure that the subject has no inkling of it.
That's not a bad idea - I'll have a go at that, but the balloon's presence may give it away a bit.
posted by a non e mouse at 8:18 PM on July 25, 2009
That's not a bad idea - I'll have a go at that, but the balloon's presence may give it away a bit.
posted by a non e mouse at 8:18 PM on July 25, 2009
Best answer: Whistle? I have been startled by a whistle on more than one occasion, and it is really easy to conceal.
posted by msali at 8:18 PM on July 25, 2009
posted by msali at 8:18 PM on July 25, 2009
Response by poster: These are great - keep them coming!
posted by a non e mouse at 8:19 PM on July 25, 2009
posted by a non e mouse at 8:19 PM on July 25, 2009
Best answer: Seconding airhorn. It definitely startles the shit out of you. On the other hand at close range, especially used indoors, it can also cause hearing damage.
How about a starter pistol?
Or a firecracker.
posted by Netzapper at 8:39 PM on July 25, 2009
How about a starter pistol?
Or a firecracker.
posted by Netzapper at 8:39 PM on July 25, 2009
Best answer: The noise needs to be louder than a cap gun (tried that).
Slightly related:
My school used to put on a haunted house of sorts, and one year there was an eXistenZ/The Game aspect to it: After the final room, you ended up in a lobby with a security guard, ostensibly waiting for your "I survived" certificate. It was planned out such that everyone but the last person would be called to the adjoining room right away. While the last person was waiting, another couple (actors, in reality) would walk in and wait on the other side of the room. After a few minutes, their conversation would start to get really heated, and would escalate to pushing and shoving. Right before the woman gets really pushed, the guard would walk over to intervene. He'd do the peaceful mediator thing - hand on the shoulder, quietly telling them to calm down. The guy would have no part of it. He pulls a gun, starts yelling, shoots the guard, and runs over to threaten and subsequently "shoot" the individual still waiting for their certificate.
30 seconds later, the doors open, and the whole group is standing around watching their friend freak out on CC television screens.
One night, it didn't quite work out. Everything went smoothly until the guard was supposed to get shot. For some reason, the cap gun jammed and wouldn't make any noise. The guard still collapsed, and in the heat of the moment, the mark didn't notice the odd silence of the situation. The thug runs over, and knowing the gun won't fire this last time, points the gun, pulls the trigger, and yells at the top of his lungs "RAT A TAT TAT!".
Based on his victim's reaction, you would have thought the gun fired an actual bullet.
Whats the moral here? Set the situation up right, and I don't care if you snap your fingers - they'll still have nightmares about it.
posted by niles at 8:41 PM on July 25, 2009 [12 favorites]
Slightly related:
My school used to put on a haunted house of sorts, and one year there was an eXistenZ/The Game aspect to it: After the final room, you ended up in a lobby with a security guard, ostensibly waiting for your "I survived" certificate. It was planned out such that everyone but the last person would be called to the adjoining room right away. While the last person was waiting, another couple (actors, in reality) would walk in and wait on the other side of the room. After a few minutes, their conversation would start to get really heated, and would escalate to pushing and shoving. Right before the woman gets really pushed, the guard would walk over to intervene. He'd do the peaceful mediator thing - hand on the shoulder, quietly telling them to calm down. The guy would have no part of it. He pulls a gun, starts yelling, shoots the guard, and runs over to threaten and subsequently "shoot" the individual still waiting for their certificate.
30 seconds later, the doors open, and the whole group is standing around watching their friend freak out on CC television screens.
One night, it didn't quite work out. Everything went smoothly until the guard was supposed to get shot. For some reason, the cap gun jammed and wouldn't make any noise. The guard still collapsed, and in the heat of the moment, the mark didn't notice the odd silence of the situation. The thug runs over, and knowing the gun won't fire this last time, points the gun, pulls the trigger, and yells at the top of his lungs "RAT A TAT TAT!".
Based on his victim's reaction, you would have thought the gun fired an actual bullet.
Whats the moral here? Set the situation up right, and I don't care if you snap your fingers - they'll still have nightmares about it.
posted by niles at 8:41 PM on July 25, 2009 [12 favorites]
Best answer: Dropping a textbook from chest height can make for a very satisfying snap.
posted by craven_morhead at 8:48 PM on July 25, 2009
posted by craven_morhead at 8:48 PM on July 25, 2009
Best answer: Snap-Pops thrown at the person in question's feet.
posted by banannafish at 9:07 PM on July 25, 2009 [1 favorite]
posted by banannafish at 9:07 PM on July 25, 2009 [1 favorite]
^ yeah I was going to say drop a large book from a significant height onto a hard floor. This is a great sound to scare the crap out of someone, especially if it is right behind them.
posted by @troy at 9:24 PM on July 25, 2009
posted by @troy at 9:24 PM on July 25, 2009
Best answer: Yep, an air horn would definitely do the trick. Check out a marine supply store or safety store.
posted by nelvana at 9:31 PM on July 25, 2009
posted by nelvana at 9:31 PM on July 25, 2009
Best answer: Quickly and repeatedly bang the back of a large cooking pan or pot with a wooden spoon.
posted by Cool Papa Bell at 9:32 PM on July 25, 2009
posted by Cool Papa Bell at 9:32 PM on July 25, 2009
Best answer: the larynx.
I had a girlfriend who would startle hiccups out of me by suddenly and without warning go AHHHHHHUGgAGABUGGA!!!!!! and while it didn't make my hiccups go away, would utterly and completely terrify me every time.
posted by bottlebrushtree at 9:53 PM on July 25, 2009
I had a girlfriend who would startle hiccups out of me by suddenly and without warning go AHHHHHHUGgAGABUGGA!!!!!! and while it didn't make my hiccups go away, would utterly and completely terrify me every time.
posted by bottlebrushtree at 9:53 PM on July 25, 2009
Best answer: If you are a chemist/have access to chemistry supplies, what you want is an Eppendorf tube and dry ice. Take a small chunk of dry ice. Place it in the Eppendorf tube. Click the tube shut.
Immediately afterwards, sidle up to your target's desk and sling it underneath. Stroll away.
As the dry ice turns into CO2, pressure will build up in the tube until, eventually, it explodes.
Naturally, this is provided as a purely theoretical exercise, and I am not responsible for any injuries which occur as a result of someone taking part in this highly entertaining and startling thought exercise.
posted by Comrade_robot at 10:15 PM on July 25, 2009
Immediately afterwards, sidle up to your target's desk and sling it underneath. Stroll away.
As the dry ice turns into CO2, pressure will build up in the tube until, eventually, it explodes.
Naturally, this is provided as a purely theoretical exercise, and I am not responsible for any injuries which occur as a result of someone taking part in this highly entertaining and startling thought exercise.
posted by Comrade_robot at 10:15 PM on July 25, 2009
Best answer: These paper noise-makers are pretty loud. And you can make them with whatever paper you've got lying around if you couldn't prepare ahead of time. We used to make these all the time when I was in middle school. It's just a folded piece of paper so it's pretty inconspicuous. Not sure if it's louder than a cap gun, but it won't take much to test it out.
posted by asras at 10:16 PM on July 25, 2009
posted by asras at 10:16 PM on July 25, 2009
Best answer: Touchpaper is a prankster's best friend. I won't link to the recipe (think of the children!) but I can recommend it as 100% effective. You make a chemical solution and soak it up with blotter paper. When the paper has dried it will be imbued with a crystalline compound that explodes at the slightest touch, with a lot of light and sound. Try leaving a sheet under a doormat - BOOM!
posted by mhjb at 10:45 PM on July 25, 2009
posted by mhjb at 10:45 PM on July 25, 2009
Best answer: Those little plastic champagne bottle noise makers you get on New Years would have the advantage of offering more decibles per square inch than about anything else on this list, and hey, they shoot streamers! They have definitely scarred the crap out of me more than once when they were popped behind me when I wasn't expecting it.
posted by slow graffiti at 10:50 PM on July 25, 2009
posted by slow graffiti at 10:50 PM on July 25, 2009
Best answer: If you have a far enough drop onto a hard surface, rig up a string-based mechanism to release about 30 or 40 of those sperm-shaped popper firecrackers.
posted by crapmatic at 10:53 PM on July 25, 2009
posted by crapmatic at 10:53 PM on July 25, 2009
Empty glass beer or wine bottles knocking together can be very loud. Your question also prompted me to google this:
Snapping Shrimp
May be hard to conceal though.
posted by evil_esto at 11:09 PM on July 25, 2009
Snapping Shrimp
May be hard to conceal though.
posted by evil_esto at 11:09 PM on July 25, 2009
Best answer: Personal Defense Alarms fit in a pocket and shriek bloody murder at 120dB. Inexpensive as well. Plant anywhere and rig a line to pull the pin. Instant Sonic Landmine.
I myself have some experience with the Screaming Meanie and can testify that you are not ready for that kind of loud, even if you know exactly when it will go off. That gadget might be better suited for a small group that can be herded into a room-sized space at a known time, though.
posted by EnsignLunchmeat at 11:24 PM on July 25, 2009
I myself have some experience with the Screaming Meanie and can testify that you are not ready for that kind of loud, even if you know exactly when it will go off. That gadget might be better suited for a small group that can be herded into a room-sized space at a known time, though.
posted by EnsignLunchmeat at 11:24 PM on July 25, 2009
Best answer: Touchpaper is a prankster's best friend. I won't link to the recipe (think of the children!) but I can recommend it as 100% effective. You make a chemical solution and soak it up with blotter paper. When the paper has dried it will be imbued with a crystalline compound that explodes at the slightest touch, with a lot of light and sound. Try leaving a sheet under a doormat - BOOM!
There's always ammonium iodide.
Procure iodine crystals and pure ammonium (no detergent, etc.). Spread the crystals in a single layer on the bottom of a paper bowl. Cover in ammonium. Allow to stand for maybe ten or fifteen minutes.
Remove the crystals and allow to dry.
Once they're dry, this is one of the most pressure-sensitive explosives ever. You can set it off by poking it with a hair. It's not especially powerful, but I really don't recommend using more than about half a gram of it at a time.
Bonus: when it pops, it releases a cloud of beautiful purple smoke. Sometimes it even does miniature (3 inch tall) purple mushroom clouds!
posted by Netzapper at 11:33 PM on July 25, 2009 [2 favorites]
There's always ammonium iodide.
Procure iodine crystals and pure ammonium (no detergent, etc.). Spread the crystals in a single layer on the bottom of a paper bowl. Cover in ammonium. Allow to stand for maybe ten or fifteen minutes.
Remove the crystals and allow to dry.
Once they're dry, this is one of the most pressure-sensitive explosives ever. You can set it off by poking it with a hair. It's not especially powerful, but I really don't recommend using more than about half a gram of it at a time.
Bonus: when it pops, it releases a cloud of beautiful purple smoke. Sometimes it even does miniature (3 inch tall) purple mushroom clouds!
posted by Netzapper at 11:33 PM on July 25, 2009 [2 favorites]
Best answer: A shaken tin can or glass jar containing a handful of pennies?
Also, a different way to scare someone- an unexpected squirt from a water pistol?
posted by pseudostrabismus at 12:49 AM on July 26, 2009
Also, a different way to scare someone- an unexpected squirt from a water pistol?
posted by pseudostrabismus at 12:49 AM on July 26, 2009
It's very Brady Bunch, but get a big broad hardcover book, and practice dropping it so that it hits the ground flat. Very effective. Assumes you have a hardwood or concrete or similar floor, though.
posted by davejay at 12:51 AM on July 26, 2009
posted by davejay at 12:51 AM on July 26, 2009
Best answer: Empty can of Pringles. Put the lid on, step on it firmly. (Or jump on it.) Sound like a cannon going off.
Take a leather belt, make a loop and grab one side in each hand (no fingers on the inside!) put your hand together and pull them apart quickly and it will crack like a whip.
Practice your best Taxi whistle.
Small balloon filled with hydrogen + a match. (Not particularly safe, but make a hell of a boom.)
Starter's pistol. Much louder than a cap gun.
Drop a glass jar full of pennies. If the loudness doesn't get them to flinch, the sound of breaking glass will.
posted by Ookseer at 2:13 AM on July 26, 2009
Take a leather belt, make a loop and grab one side in each hand (no fingers on the inside!) put your hand together and pull them apart quickly and it will crack like a whip.
Practice your best Taxi whistle.
Small balloon filled with hydrogen + a match. (Not particularly safe, but make a hell of a boom.)
Starter's pistol. Much louder than a cap gun.
Drop a glass jar full of pennies. If the loudness doesn't get them to flinch, the sound of breaking glass will.
posted by Ookseer at 2:13 AM on July 26, 2009
Best answer: Empty juice-box. Stamp on it. BOOM!
Also, I have a load of the "mini pillow" bubblewrap, you know the inflated bags about the size of your hand? They bang like a mofo as well, can also be hidden in a pocket and popped by clenching it in your fist. Even the quarter-sized bubblewrap is pretty loud and easily concealable. But really, juice-box!
posted by Iteki at 2:14 AM on July 26, 2009
Also, I have a load of the "mini pillow" bubblewrap, you know the inflated bags about the size of your hand? They bang like a mofo as well, can also be hidden in a pocket and popped by clenching it in your fist. Even the quarter-sized bubblewrap is pretty loud and easily concealable. But really, juice-box!
posted by Iteki at 2:14 AM on July 26, 2009
Best answer: Along the same lines as empty juice box (but easier to conceal), an empty crisp packet (er, chip packet?) with the open end placed facing you on your hand can be popped by bringing your other hand down on it sharply. There is a bit of a trick to it, you have to try and channel the trapped air towards the sealed end. It makes a suprisingly loud noise and is very quick to execute. When you get good you can move onto smaller wrappers like plastic chocolate bar wrappers.
posted by jzed at 3:14 AM on July 26, 2009
posted by jzed at 3:14 AM on July 26, 2009
Please don't do this stuff near the person's ears. Hearing is nice to preserve.
posted by theora55 at 8:55 AM on July 26, 2009
posted by theora55 at 8:55 AM on July 26, 2009
Seconding theora55. As a sound engineer, I would also be QUITE pissed off should someone try this on me.
posted by Aquaman at 3:51 PM on July 26, 2009
posted by Aquaman at 3:51 PM on July 26, 2009
Best answer: Not the loudest thing on the list, but belt-snapping is highly convenient: fold a leather belt in half, holding the middle in one hand and the ends in the other. Bring your hands toward each other just enough to create a few inches space between the two layers of leather, then yank the belt taut, to slap the layers into each other. Yes, you must practice for optimal volume.
posted by aimedwander at 9:20 PM on July 26, 2009
posted by aimedwander at 9:20 PM on July 26, 2009
Response by poster: Thanks everyone - I'm going to go with the air-horn initially and see if that has the desired effect - I'll work my way through the list if it doesn't.
posted by a non e mouse at 2:43 AM on July 30, 2009
posted by a non e mouse at 2:43 AM on July 30, 2009
This thread is closed to new comments.
I am told *cough* that an ordinary balloon full of LPG or propane will make a very dramatic exit when it is introduced to a cigarette lighter.
posted by localroger at 8:12 PM on July 25, 2009