shattering point
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=77855
Printed Date: April 26, 2024 at 1:57 PM
Topic: shattering point
Posted By: danny boy
Subject: shattering point
Date Posted: May 16, 2006 at 8:19 AM
hi i heard of someone that 150 db is shattering point for glass is this true if not what is the shattering point?? ------------- CRZYVS
Replies:
Posted By: russ lund
Date Posted: May 16, 2006 at 9:48 AM
You can't say for sure what point Db wise.But the way to break the glass besides a hard sharp object,is to find the resonant frequency of the piece of glass (ie: the windshield) and blast the hell out of it..
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BigDog
Posted By: luckydevil
Date Posted: May 16, 2006 at 10:07 AM
I heard the Mythbusters crew was at a recent SPL competitiion in Orlando filming for an upcoming episode on the windshield myth. I'm very interested to see their analysis and what they come up with.
Posted By: AJRXtreme
Date Posted: May 16, 2006 at 10:10 AM
Ive sat inside a 153db blazer and his windows sure flexed but didnt shatter. ------------- 03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: haemphyst
Date Posted: May 16, 2006 at 6:03 PM
luckydevil wrote:
I heard the Mythbusters crew was at a recent SPL competitiion in Orlando filming for an upcoming episode on the windshield myth. I'm very interested to see their analysis and what they come up with.
SWEET... Where'd ya hear that? I'll be DVRing that for sure! L-O-V-E those guys!
"I reject your reality, and substitue my own!" LOL ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: Master Asylum
Date Posted: May 16, 2006 at 6:18 PM
I'd really like to know if anyone has info concerning this. I'm kinda tired of local people coming in and saying people have blown out their windows and such. I really doubt there's that many people with the money, time, talent, and investment into it to successfully pull this off.
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1998 Monte Carlo w/
Eclipse CD8454
2xRockford 5.25" Power 2-way T152C
2xRockford 6"x9" Punch 3-way FRC4369
1xMemphis 16-MCH1300 5-channel
2xKicker 12" L5 Solobaric-2 Ohm
Posted By: zhalverson
Date Posted: May 17, 2006 at 12:59 AM
Just my 2 cents but glass is a very difficult thing to put any specific failure point on. In my materials class at college we were doing destructive testing on a variety of materials; plastics, metals, and glass. Metals, and plastics for the most part, fail in a predictable manner. On the other hand glass definately does not. Glass is predicted to fail in a statistical manner, that is an average can be determined. Often times failure can occur far from the average on both sides. So my guess is that it is possible for people to blow their windows out but it is just isolated incidences. Like mentioned above the resonant frequency of the glass would adversely affect this though. Oh yeah, mythbusters is such a cool show, I hope they do have that episode to put this question to rest.
Posted By: jt824
Date Posted: May 17, 2006 at 1:06 AM
How did your ears feel from that pressure? AJRXtreme wrote:
Ive sat inside a 153db blazer and his windows sure flexed but didnt shatter.
Posted By: jeffchilcott
Date Posted: May 17, 2006 at 7:49 AM
We have some videos on our site of 150.6 with no one on the glass and yes, it will flex like mad. they are also on realm of excursion under the competiton pages.
Typically you will not shatter glass untill aproaching the 165db range, the only other was is like said if a sharp object hits or rattles aginst it.
Yes Mythbusters was at Spring Bash, A DB drag show. It is supposed to air late this season sometime, if I get more info I will let ytou all know. But I will say this, no one shattered thier window.
I do have a video of the riley's shattering thier window at over 170db, I will have to post it later today so you all can see it.
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: jeffchilcott
Date Posted: May 17, 2006 at 8:12 AM
i dont know if the link will work, if not I will try to post again later
https://s11.photobucket.com/albums/a191/sugarbailey2/?action=view¤t=arts.flv
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: haemphyst
Date Posted: May 17, 2006 at 8:34 AM
That's nice, but who is "sugarbailey"?
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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: xtremej
Date Posted: May 17, 2006 at 9:21 AM
I have not seen a window shatter from spl yet. I have a few customers that claim it blew out every window in the vehicle and they lived to tell about 100% usda b.s. I have seen windows flexing which is pretty cool. I would be intrested in seeing a window shatter though, so if anybody has pic or clips post'em up. -------------
Posted By: jeffchilcott
Date Posted: May 17, 2006 at 5:01 PM
sugarbailey, is my girlfriend......I might have some vids of when the window spidered during some testing runs after finals.
we had small chip in the window before USACi finals, after finals it was cracked across the windshiled.
one nice winter day I decided to crank it up on the road, and that was a mistake..it spidered all the way across.
OUr civic has factory glass all around and it has flexed like crazy but not given out at over 153db
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: ottomatic481
Date Posted: May 19, 2006 at 1:05 PM
A good freind of mine had 4, 12" JL's in his chevy s10, and pulling out of a gas station, he turned it up and shattered his back winsheild.. later that month he fixed his window and went to an audio comp and hit at 198, but when the windsheild broke, he was only three quaters.. so maybe 170??
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4 12's in a single cab f-150... yeah its nasty
Posted By: Aruman
Date Posted: May 19, 2006 at 1:12 PM
198 what?
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Shaking The Neighborhood
Posted By: DYohn
Date Posted: May 19, 2006 at 2:31 PM
Aruman wrote:
198 what?
198 mega-zillion-SPL's baybeee! The most I ever saw happen was a guy pop the rear window out of his Beetle, which slid down the back and shattered on the concrete. 149.9db exceeded the pressure rating of the OEM window gasket, apparently. ------------- Support the12volt.com
Posted By: Paradigm
Date Posted: May 19, 2006 at 2:34 PM
ottomatic481 wrote:
A good freind of mine had 4, 12" JL's in his chevy s10, and pulling out of a gas station, he turned it up and shattered his back winsheild.. later that month he fixed his window and went to an audio comp and hit at 198, but when the windsheild broke, he was only three quaters.. so maybe 170??
Before anyone else lashes out at you, you might want to rethink of posting this sort of stuff. To my knowledge (and I don't do comps and generally don't care about the numbers), there is no one in the world who has legitimately done anything of that magnitude. Be honest when you post, and you'll get more help and responses. If you're dishonest...well, don't be surprised if you get ignored.  ------------- VEHICLE: 2002 GMC Sonoma ZR2
Alpine CDA-7940
AudioControl EQT x2
JL Audio 1000/1
JL Audio 10W6 (originals) x3
Kicker ZR120
Kicker ZR460
Polk GXR-6 x4
Polk GXR-4 x2
Posted By: xtremej
Date Posted: May 19, 2006 at 2:45 PM
"198"  . Are you sure they weren't audiobahns. Ha hA. I think you should consider re-hab if you believe these numbers to be true....................... -------------
Posted By: luckydevil
Date Posted: May 19, 2006 at 2:57 PM
Aruman wrote:
198 what?
Watts rms probably. 
Oh and that video posted is friggin ridiculous. WOW.
Posted By: Overcranked23
Date Posted: May 19, 2006 at 3:06 PM
yeah I was there When he Hit 198 Trilion DBs Me car was next to it and the sound waves Totaled my car! I think it was right after band camp LMAO!
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don't fowl the track
Posted By: Aruman
Date Posted: May 19, 2006 at 5:18 PM
Ottomatic481 do you know how loud 140dB is, how loud 150dB is? with 198dB you and your friend will be dead. check this site, https://www.makeitlouder.com/Decibel%20Level%20Chart.txt
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Shaking The Neighborhood
Posted By: jayson358
Date Posted: May 19, 2006 at 5:40 PM
i think the loudest recorded is by pioneer this yr was i think 178-183db somewhere round its the current record i believe correct me if im wrong
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93 diamante
pioneer deh-p3800mp
crossfire 40 band eq
alphasonik pma4075 mid amp
clif designs cd10.1Lx sub amp
powerbass xtreme 6 1/2 comp
" " 6x9 rear
alpine 2 12" type r
ported 40hz tune
Posted By: xtremej
Date Posted: May 19, 2006 at 6:41 PM
Well otto's good friend broke the record, congraulations to him . -------------
Posted By: auex
Date Posted: May 19, 2006 at 6:59 PM
Funny stuff here.
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Certified Security Specialist
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Posted By: Overcranked23
Date Posted: May 19, 2006 at 7:39 PM
That chart is cool I love how Ottos friends truck is louder than being inside a Rock concert speaker and even better yet 1 ton of tnt at 150 feet.
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don't fowl the track
Posted By: luckydevil
Date Posted: May 19, 2006 at 10:28 PM
Screw busting windows. I'm shooting for 286db, the point where the subs start burping out molten lava.
Posted By: jeffchilcott
Date Posted: May 20, 2006 at 7:36 AM
The current legal recorded world record and loudest noise metered on the B and K meter is 180.5 db...done by scott owens with pioneer products.
Cant remember off the top of my head but something like 16 subs 64 amps
the crazy part is that they have another vehicle with 2 12' subs doing 176.1! that is truly crazy in my thoughts...and its all in a scion xb.
I will have to fin dsome links and pictures from USACi finals last year to post.
Makes our 153 look tiny haha
Maybe next month we can get that a little louder on 2 subs.
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: Aruman
Date Posted: May 20, 2006 at 7:49 AM
Jeff, 176.1 with 2 12" wauw, didn't they mention the models of the subs and how many amps they used? that's grazy, wow.
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Shaking The Neighborhood
Posted By: jeffchilcott
Date Posted: May 20, 2006 at 2:19 PM
the scion has (2) pioneer tsw-5000spl woofers and 32 of thier biggest amp...5000 something or another.
the Truck has 13 woofers and 52 amps same series equipment
https://www.termpro.com/asp/competitorstats.asp?Competitor_ID=34610&Season=2006
there are some pics on that site listed above
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: oxygen65
Date Posted: May 20, 2006 at 5:52 PM
i just clicked on this link becuse i thought it would be intresting and 198 db's is the funniest thing i have ever heard in my life becuse like jeffchilcott said that loudest car in the world only hits 180.5 and you wouldnt even be able to sit inside that car becuse it is so loud. so for your friend to pull out of a gas station doin 198 and be driving a car is just a lie. people who do 170+ dont even have their hu's inside that car becsue it wont work. i dont kno how many people here have ever heard a car that does 150 db's but if you have sat inside one doing 150+ you know that it is loud as hell, so to sit inside a car doing 198 and driving is just rediculus.
Posted By: Ravendarat
Date Posted: May 20, 2006 at 9:57 PM
ottomatic481 wrote:
A good freind of mine had 4, 12" JL's in his chevy s10, and pulling out of a gas station, he turned it up and shattered his back winsheild.. later that month he fixed his window and went to an audio comp and hit at 198, but when the windsheild broke, he was only three quaters.. so maybe 170??
Im gonna hope that this is a joke. If not then its people like this that annoy the hell outta me. Drives me f'ing nuts ------------- double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: jeffchilcott
Date Posted: May 21, 2006 at 7:33 AM
That is excatly why I love having a Term-lab at my disposal now....I didnt have one when I was trying to startup a shop, but have one now that I run in so many shows per year, haha
But we love to find the Big mouths around town and invite them to a little testing session. I am still a little weary about having alot of people in my new garage.....but the alarm would wake the neighbors 2 blocks away.
Im hoping to get something to work out in a mini-truck we are working on by the end of next weekend, going to try to get it to the same level as the civic 153db. I would like more but after 2 failed attempts of getting there its time to go back to the drawing board with an empty template
I have my own personal goals set for the year, and I will only know once I get all the equipment built right and in the car, and the car is running! My plans are over the 160db barriar with less then 1000 watts of 4 ohm rated power :-) 160.0 was first place last year so I have to bring more then that to USACi finals this year!
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: oxygen65
Date Posted: May 21, 2006 at 10:26 AM
Posted By: Steven Kephart
Date Posted: May 21, 2006 at 6:21 PM
I don't know about windows, but here's a video of Scottie Johnson breaking his door: https://www.realmofexcursion.com/images/thumbnails/brands/adire/brahma12.3.wmv -------------
Posted By: Steven Kephart
Date Posted: May 21, 2006 at 9:15 PM
Posted By: Silvrefox
Date Posted: May 21, 2006 at 10:46 PM
I might be mistaken, but didn't Alma Gates blow out the rear glass in the Beast when she was with Kicker?
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BOOSH!!
Posted By: Ravendarat
Date Posted: May 21, 2006 at 10:53 PM
She did at a comp, down in florida I think. I know I heard from more than one person, including the kicker rep, that it was a staged blowout though. The way I heard it, and this is completly second hand info so it could be complete BS, is that Alma was paid by kicker to set up the glass to blow out as the event had a lot of people attend that werent nessasarily competitiors but people who were just kinda walking by and were drawn in. If I remember right I think the comp was on the strip by the beach but I could be wrong, this is 5 years ago now. Anyways they, meaning kicker, figured that some people might remember who won but a lot more people would remeber the vehicle that had a stereo so big it blew out its windows, hence the reason for the spectacle. Like I said, this is all rumor but if it was true than I cant diasagree with the logic involved.
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: jeffchilcott
Date Posted: May 22, 2006 at 7:39 AM
it was a semi staged event. the lexan was taken out of the frame and normal glass was put back in...it was going to bolw out with out a doubt.
normally around 165db is where the windows in anything will go...but I know of an old S-10 that has been to the 165db mark and kept the factory glass intact!
I know of 3 CRX's that have been over the 160db ,mark and the factory glass has made it a few months but they will typically go out
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: oxygen65
Date Posted: May 22, 2006 at 2:31 PM
the bigest reason why glass does crack or shatter is becuse there is a chip or crack forming in the glass already. a brand new windsheild would be very hard to shatter even at 165db, but that is at the point were it happends. also if it is cold likein the winter you can crack your glass.
Posted By: thatboytonyton
Date Posted: May 25, 2006 at 9:09 PM
Does anyone know how to figure out just how many dbs your system puts out? Before i had all these friggin problems, my poor little truck (Ranger XLT) would rumble like crazy.
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Its Plum!
Posted By: jeffchilcott
Date Posted: May 26, 2006 at 7:45 AM
very simple, go to a sanctioned event by USACi or DB drag. or go to a shop that has a term-lab or audiocontrol 190 meter on hand! call local shops someone might have one.....or if you tell me where you are located I could refer you to a shop or shows in your area
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: thatboytonyton
Date Posted: May 26, 2006 at 1:33 PM
Im located in San Antonio, TX. You know of any mini truck clubs?
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Its Plum!
Posted By: jeffchilcott
Date Posted: May 26, 2006 at 4:59 PM
I dont know of any mini clubs, I just know of a few up here because we just got done working (well we never quit working on it) a mazda B2200.
I know in texas there are lots and lots of events for USACi
check here for some of your local shows around you
https://www.soundoff.org/cgi-bin/schedule/display.cgi?search=1&display_all=1
the texas heatwave shows have tons and tons of minit trucks and lowriders
I believe they are at texas heatwave productions.
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
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