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originally posted by: StargateSG7
They were bouncing a laser off the embassy windows and
converting the minute vibrations from conversations into
digital audio waveforms.
---
I can even use a high-speed, ultra-high resolution camera to photograph
the minute vibrations of the FURNITURE IN YOUR ROOM as you talk
and convert that minute pixel movement into audio waveforms!
originally posted by: TerryDon79
a reply to: StargateSG7
No you can't. The vibrations are too small. You would need a larger vibration to recognise anything. The best you would pick up would be what sounded like someone mumbling under a pillow. There would be no recognisable words at all.
originally posted by: peppycat
Hope they like listening to me singing to my cat about how wonderful he is!
originally posted by: Bedlam
originally posted by: StargateSG7
They were bouncing a laser off the embassy windows and
converting the minute vibrations from conversations into
digital audio waveforms.
---
I can even use a high-speed, ultra-high resolution camera to photograph
the minute vibrations of the FURNITURE IN YOUR ROOM as you talk
and convert that minute pixel movement into audio waveforms!
You're sort of conspicuously lacking lasers and ultra high res cameras here. You can't say "I saw this other totally non-related thing, therefore, smart phones can do it too!!!"
It's a phone, it already has a microphone...
originally posted by: Bedlam
originally posted by: TerryDon79
a reply to: StargateSG7
No you can't. The vibrations are too small. You would need a larger vibration to recognise anything. The best you would pick up would be what sounded like someone mumbling under a pillow. There would be no recognisable words at all.
Oddly enough, you can do both those things. The laser thing is so ubiquitous in the IC that you generally don't have windows in offices where you're going to be having those sorts of discussions. And some buildings even have a sort of freaky dual-pane setup where they pipe in turbulent air and/or sound between the panes to forestall it.
originally posted by: StargateSG7
originally posted by: Bedlam
originally posted by: TerryDon79
a reply to: StargateSG7
No you can't. The vibrations are too small. You would need a larger vibration to recognise anything. The best you would pick up would be what sounded like someone mumbling under a pillow. There would be no recognisable words at all.
Oddly enough, you can do both those things. The laser thing is so ubiquitous in the IC that you generally don't have windows in offices where you're going to be having those sorts of discussions. And some buildings even have a sort of freaky dual-pane setup where they pipe in turbulent air and/or sound between the panes to forestall it.
===
"...The laser thing is so ubiquitous in the IC that you generally don't have windows in offices where you're going to be having those sorts of discussions. ..."
my response:
IC mean Intelligence Community in case you're all wondering.....
At Langley, VA (CIA) even the outside windows have micro-wires
in them and conductive film to act as EM foils. .... JUST SO YA KNOW!
NOw for ME to PROVE WHAT I HAVE SAID
would mean I woudl have to disclose a
rather sensitive document which would
THEN cause a source I happen to LIKE
to suddenly DISLIKE being my source!
originally posted by: TerryDon79
a reply to: Bedlam
I thought they just used rippled double pane glass with the ripples going in opposite directions on each pane.
originally posted by: Bedlam
originally posted by: TerryDon79
a reply to: Bedlam
I thought they just used rippled double pane glass with the ripples going in opposite directions on each pane.
They have glass shakers as well, but at least two buildings in the DC area have widely separated panes with VOA or something piped in along with turbulent air.
You can have it whine or hiss, most people prefer hiss. YMMV.
originally posted by: Bedlam
There are several problems here.
Changes in air density would cause effects many many orders of magnitude less than a touch, if any effect at all. You wouldn't design to sense such things. If you could get away with an 8 bit ADC, you wouldn't just decide to put in a 14 bit one that can encode uV noise levels for the lulz.
Next, you wouldn't normally use a converter type that can encode at 10k conversions per second for fun, either. Why would you ever need that for a touch screen? So, you've got that against you too.
That alone would be enough, but the touch screen interfaces are generally no 'smarter' than they need to be as well. Why pay for horsepower and storage for an interface that's never going to need it? So you won't have all this magic computational ability either.
And finally, you've got a big fat 'why?' to deal with. Why bother? You HAVE a microphone, and a perfectly good sound processing section. This gets back to the same thing you get from people who are afraid of death beams from satellites. Why bother, when you can just shoot the guy for a billionth of the price? Why over-engineer (or in this case, probably hyper-engineer) a touch screen so that it can be used as an amazingly crappy microphone when you have one sitting right there?