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Can Glass be broken by Sound ?

post #1 of 33
Thread Starter 
Was seeing CSI New York Season 3 episode 2.

in which they show the robbers use an mp3 file on iPod connected to stereo speakers via idock and break the glass counters holding the jewelerry.

later the CSI guy explains the robbers used some sine waves of ultra high frequency for that.



Is it really possible? or just a creation of Hollywood?
post #2 of 33

Yes it is possible

You could either contemplate the big bang of the creation of the universe or read the following Breaking Glass Tutorial | Acoustics, Audio and Video | University of Salford - A Greater Manchester University

CSI rocks!

Sceptre
post #3 of 33
Glass sure can be broken by sound.
Even the human voice can do it. 556Hz @ 105DB...

+ YouTube Video
post #4 of 33
Mythbusters did a segment on this as well. As noted above, it's possible, but requires figuring out the right frequency and generating some pretty high levels of output. I haven't seen the episode, but I expect any faults lie in the output level and required equipment to achieve it. There are probably better ways of committing a crime than hauling a concert stack to the scene.
post #5 of 33
Quote:
Originally Posted by BradJudy View Post
Mythbusters did a segment on this as well.
Did you even click the YouTube movie I embedded?
post #6 of 33
Did you guys see mythbusters rig a 5 ft subwoofer in an old Benz to see if it could blow out the windows?
post #7 of 33
that stupid show Time Warp also did a segment on this
post #8 of 33
Note that it's not glass, it's crystal...it's much more sensitive to resonant frequencies.
post #9 of 33
I would think that jewelry glass counters are much stronger than ordinary wine goblets.
post #10 of 33
Quote:
Originally Posted by krmathis View Post
Did you even click the YouTube movie I embedded?
Actually, no. I have flashblock installed and despite clicking to start the video it didn't work so I didn't know what you linked to.
post #11 of 33
Thread Starter 
Quote:
Originally Posted by wuwhere View Post
I would think that jewelry glass counters are much stronger than ordinary wine goblets.
and can u believe it was an mp3 file..

and the speakers were those cheesy ipod dock based speakers...something like those Bose ones but louder
post #12 of 33
if mythbusters says it can happen, then it can happen
post #13 of 33

It's like picking your nose with a telegraph pole

It can be done but so what?

A brick or sledgehammer is so much more effective at breaking glass.

Sceptre
post #14 of 33
Quote:
Originally Posted by Sceptre View Post
It can be done but so what?

A brick or sledgehammer is so much more effective at breaking glass.

Sceptre

LOL!
Quite true. Now making a mental note (no pun intended) to remember this next time I need to knock over a jewelry store.

BTW, as far as CSI goes......... Miami is REALLY starting to get on my nerves. I wish the writers for that one would go back on strike so they can find some new ones. sheesh!
post #15 of 33
Quote:
Originally Posted by Golden Monkey View Post
Note that it's not glass, it's crystal...it's much more sensitive to resonant frequencies.
Just run your finger round the rim to ascertain the frequency needed then use a tone generator and a lot of wattage

Alternatively, throw an ipod at a window, that'd be music breaking glass.
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