[Cont'd Tuesday Feb 21] Detect Sound of Breaking Glass with Labview

Hello. I'm an undergraduate working on a project to build a home
security system using DSP and NI's Speedy-33 board. My question is :
1) how can I detect breaking glass sound
   using LabView?
2) how to connect external hardware(e.g
   siren, lights) to the Speedy-33 board
   that will be activated if breaking
   glass is detected.

Thank you.

Update:
Hi guys. Thanks a lot for the excellent replies. This is actually a
Senior Design class and I'm assigned a project that uses DSP. Since
we have National Instrument's Speedy-33 board, it would be easier to
interface with it with Labview. What we're trying to build here is a
home security system that monitors(through microphones) a glass panel
to see if a break-in occurs.

I guess what I wanted to know is if there is a specific pattern for the

input that i will be getting off the microphone. because i think the
generated waveform really depends on how hard i hit it or even the
position on the glass where the contact occured.

More specifically, how can I use Labview to achieve this? Or what type
of signal processing methods would I have to undertake? I would say the

timeline that I have is about 2 months.

sadlah@yahoo.com.sg writes:

> Hello. I'm an undergraduate working on a project to build a home
> security system using DSP and NI's Speedy-33 board. My question is :
> 1) how can I detect breaking glass sound
>    using LabView?
> 2) how to connect external hardware(e.g
>    siren, lights) to the Speedy-33 board
>    that will be activated if breaking
>    glass is detected.
> 
> Thank you.
> 
> Update:
> Hi guys. Thanks a lot for the excellent replies. This is actually a
> Senior Design class and I'm assigned a project that uses DSP. Since
> we have National Instrument's Speedy-33 board, it would be easier to
> interface with it with Labview. What we're trying to build here is a
> home security system that monitors(through microphones) a glass panel
> to see if a break-in occurs.
> 
> I guess what I wanted to know is if there is a specific pattern for the
> 
> input that i will be getting off the microphone. because i think the
> generated waveform really depends on how hard i hit it or even the
> position on the glass where the contact occured.
> 
> More specifically, how can I use Labview to achieve this? Or what type
> of signal processing methods would I have to undertake? I would say the
> 
> timeline that I have is about 2 months.
> 

Might be worth the $50:

http://webstore.ansi.org/ansidocstore/product.asp?sku=SIA+GB-01-1994.12

Ciao,

Peter K.

-- 
"And he sees the vision splendid 
of the sunlit plains extended
And at night the wondrous glory of the everlasting stars."

 

This looks like the same document, at no cost:

http://www.google.com/url?sa=t&ct=res&cd=3&url=http%3A//www.siacinc.org/documents/STANDARDS/Glass%2520Break%2520Standard%2520GB-01.pdf&ei=e9L7Q7_qM4PSafLvzKIP&sig2=TUXB8bgGtQoTNPUak5hijQ