Re: Window Foil

["Robert L Bass" <RobertLBass@xxxxxxxxxxx>]

> If you put an empty jar in a paper bag and break it, won't that
> testit just fine?

It depends on which detectors you're using.  Some detectors
(IntelliSense, for example) are designed to detect the high frequency
cracking of the glass plus the low frequency pulse caused by striking
the glass.  The low frequency sound depends on the glass being part
of the perimeter of the space, like the skin on a drum.  These are
tested by thumping the glass, which in turn triggers the tester to
emit a sound similar to glass shattering.

--

Regards,
Robert L Bass

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