how many db to break a window
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=108391
Printed Date: April 25, 2024 at 6:14 AM
Topic: how many db to break a window
Posted By: still_walkin
Subject: how many db to break a window
Date Posted: October 25, 2008 at 12:40 AM
I was wondering has anyone broke any windows or anything off a caused by a stereo. How many db was you doing setup etc.
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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"
Replies:
Posted By: KarTuneMan
Date Posted: October 25, 2008 at 12:04 PM
really. ?
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Posted By: DYohn
Date Posted: October 25, 2008 at 12:20 PM
I once broke the rear window in my competition VW bug with about 128db. The window popped right out of the gasket, slid down the back of the car and smashed on the ground. DQ!  ------------- Support the12volt.com
Posted By: megaman
Date Posted: October 25, 2008 at 12:27 PM
DYohn] wrote:
once broke the rear window in my competition VW bug with about 128db. The window popped right out of the gasket, slid down the back of the car and smashed on the ground. DQ!
lol, I saw that happen with an old superbeetle at 131db. 
Posted By: DYohn
Date Posted: October 25, 2008 at 12:29 PM
megaman wrote:
DYohn] wrote:
once broke the rear window in my competition VW bug with about 128db. The window popped right out of the gasket, slid down the back of the car and smashed on the ground. DQ!
lol, I saw that happen with an old superbeetle at 131db.
Ha! Yea, mine was a '73 Superbeetle. ------------- Support the12volt.com
Posted By: DYohn
Date Posted: October 25, 2008 at 12:35 PM
To answer your question, still_walkin, glass - especially automotive safety glass - is very strong. While windshields have been know to fracture in some comp vehicles with greater than 165dbSPL, it's probably more likely they broke from vibration or had a small crack before the run than it is that the sound pressure alone broke them. To flex auto glass enough to break from SPL alone would probably require more than 180dbSPL. ------------- Support the12volt.com
Posted By: still_walkin
Date Posted: October 25, 2008 at 4:55 PM
Thanks for the replies and no I don't want to break my windows just wanted to know how much it took to break one .
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1993 sdv
Alpine 4x6 6x9 5 1/4 swr-10d4
alpine v60
12.5 VGA flip down
Nettop pc w/10" touch screen
78nova
5-re audio 5x7 ,10" sub &
Xtx-500.5
"Take the faceplate off get the jumperpack"
Posted By: 04nata
Date Posted: October 26, 2008 at 9:59 PM
I cracked a windshield in Mazda B2000 Xcab, 2- 12's and 2-15's downfired with 135db
Posted By: jeffchilcott
Date Posted: October 26, 2008 at 10:21 PM
well this is my knid of topic. I have cracked the windshield in my 88 crx above 160 db. and depending on the setup in some vehicles it is easy to destroy a windshield below 170db.
he are cideos of a van I was working on shortly before dbdrag finals. Each time we broke the windshield we were upwards of 167DB. We broke 3 winsheilds in 1 week testing before finals
https://www.youtube.com/watch?v=5ATZArN7Zk8
https://www.youtube.com/watch?v=1e0AV1RBq0w
https://www.youtube.com/watch?v=B2LRFjVVjuY
The main thing in breaking thw windshield is more or less the frequency used. I was burping at mid to high 60 hz range, where the van uses a mid to low 50 hz range tone. I could see someone breaking a windsheild in the 150 db range if plaing something in the 30-40hz range
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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: dragon51
Date Posted: October 26, 2008 at 11:19 PM
Sweet! However to make the videos work you have to change the spelling........ of YOU! lol not yuo
Posted By: KarTuneMan
Date Posted: October 26, 2008 at 11:38 PM
I could just see the excitment in Jeff's typing......
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Posted By: jeffchilcott
Date Posted: October 27, 2008 at 3:00 PM
I dont know what happened to the links, it was just a copy and paste job. I havent chimed in for quite awhile, as I have been my first year of retirement from SPL. I will post more in the off topic section about what I have been up to.
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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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