shattering point

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danny boy

Member - Posts: 14

Joined: May 11, 2006

Location: Australia

Posted: May 16, 2006 at 8:19 AM / IP Logged

hi i heard of someone that 150 db is shattering point for glass is this true if not what is the shattering point??

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russ lund

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Joined: April 07, 2004

Location: United States

Posted: May 16, 2006 at 9:48 AM / IP Logged

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..

BigDog

luckydevil

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Joined: July 04, 2005

Location: United States

Posted: May 16, 2006 at 10:07 AM / IP Logged

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.

AJRXtreme

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Joined: June 08, 2004

Location: United States

Posted: May 16, 2006 at 10:10 AM / IP Logged

Ive sat inside a 153db blazer and his windows sure flexed but didnt shatter.

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haemphyst

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Posted: May 16, 2006 at 6:03 PM / IP Logged

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."

Master Asylum

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Joined: November 05, 2004

Location: United States

Posted: May 16, 2006 at 6:18 PM / IP Logged

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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zhalverson

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Joined: January 21, 2005

Location: United States

Posted: May 17, 2006 at 12:59 AM / IP Logged

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. shattering point -- posted image.

jt824

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Joined: March 17, 2006

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Posted: May 17, 2006 at 1:06 AM / IP Logged

How did your ears feel from that pressure?

AJRXtreme wrote:

Ive sat inside a 153db blazer and his windows sure flexed but didnt shatter.

jeffchilcott

Platinum - Posts: 2,483

Joined: April 11, 2002

Location: United States

Posted: May 17, 2006 at 7:49 AM / IP Logged

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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jeffchilcott

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Posted: May 17, 2006 at 8:12 AM / IP Logged

i dont know if the link will work, if not I will try to post again later

http://s11.photobucket.com/albums/a191/sugarbailey2/?action=view¤t=arts.flv

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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