Ooooo, superneatocool!    These guys have discovered that a speckle-
pattern made by a laser spot hitting a distant surface   ...is
modulated with audio!   Let your laser hit the skin or clothing
(or cellphone) of a very distant person, and you can tap into their
conversation or listen to their heartbeat.  The CIA doesn't have to
bounce lasers off windows anymore!  They can shine the spot on your
head, and pick out just your voice (or use separate beams to record
a few voices in a distant crowd.)

  Simple optical setup detects speech remotely
  Laser Focus World, Jan 2010,
  http://tinyurl.com/laserbugZalevsky


Their PDF paper has some example .WAV files

  Simultaneous remote extraction of multiple speech sources and heart
beats from secondary speckles pattern
  http://tinyurl.com/ydgc97f
  http://www.opticsinfobase.org/abstract.cfm?uri=oe-17-24-21566


They used high-framerate video and a correlation algorithm to do
this.  The speckle pattern supposedly vibrates side to side at
some angle.  We could stick a pair of photodiodes (or a line-
array) behind a camera lens, shine the speckle on our diodes,
then take a difference signal from adjacent ones.  (With some pairs
the signal would be inverted.)  Rotate your camera to find the max
audio.   Or  ...is it possible to hack an opto-mouse chip so it
can give an audio output whenever vibrating laser-speckle shines
upon its sensor array?  (And are those chip suppliers working on
one of these even as we speak?  I would! )


((((((((((((((((((((((( (  (    (o)    )  ) )))))))))))))))))))))))
William J. Beaty              Research Engineer
beaty, chem washington edu    UW Chem Dept,  Bagley Hall RM74
billb a eskimo com            Box 351700, Seattle, WA 98195-1700
ph206-762-3818                http://staff.washington.edu/wbeaty/

On 2/5/2010 3:53 PM, Bill Beaty wrote:
> Ooooo, superneatocool!    These guys have discovered that a speckle-
> pattern made by a laser spot hitting a distant surface   ...is
> modulated with audio!   Let your laser hit the skin or clothing
> (or cellphone) of a very distant person, and you can tap into their
> conversation or listen to their heartbeat.  The CIA doesn't have to
> bounce lasers off windows anymore!  They can shine the spot on your
> head, and pick out just your voice (or use separate beams to record
> a few voices in a distant crowd.)
>

This is an ancient technique.  The speckle pattern moves at twice the 
speed of the objects--it's been used to measure the motion of paper in 
hand-held scanners such as the HP Capshare 920 (circa 1996), and is the 
basis of electronic speckle pattern interferometry (ESPI, more commonly 
called TV interferometry).

You do have to be close enough to actually get a speckle pattern before 
it will work, though.  The speckles get larger as you go further away, 
and that plus the inverse square law will make the technique less 
sensitive pretty fast.

Of course, if you're wearing your aluminum foil beanie with the shiny 
side out, it's a nice specular reflector and won't make a lot of speckle. ;)


Cheers

Phil Hobbs


-- 
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net

On Fri, 05 Feb 2010 17:08:01 -0500, Phil Hobbs
<p...@electrooptical.net> wrote:

>On 2/5/2010 3:53 PM, Bill Beaty wrote:
>> Ooooo, superneatocool!    These guys have discovered that a speckle-
>> pattern made by a laser spot hitting a distant surface   ...is
>> modulated with audio!   Let your laser hit the skin or clothing
>> (or cellphone) of a very distant person, and you can tap into their
>> conversation or listen to their heartbeat.  The CIA doesn't have to
>> bounce lasers off windows anymore!  They can shine the spot on your
>> head, and pick out just your voice (or use separate beams to record
>> a few voices in a distant crowd.)
>>
>
>This is an ancient technique.  The speckle pattern moves at twice the 
>speed of the objects--it's been used to measure the motion of paper in 
>hand-held scanners such as the HP Capshare 920 (circa 1996), and is the 
>basis of electronic speckle pattern interferometry (ESPI, more commonly 
>called TV interferometry).
>
>You do have to be close enough to actually get a speckle pattern before 
>it will work, though.  The speckles get larger as you go further away, 
>and that plus the inverse square law will make the technique less 
>sensitive pretty fast.
>
>Of course, if you're wearing your aluminum foil beanie with the shiny 
>side out, it's a nice specular reflector and won't make a lot of speckle. ;)
>
>Cheers
>
>Phil Hobbs

Cripes!  Now you've given those foil hat types a rational
excuse to use in avoiding capture by the straight jacket
types.  ;)

Jon

Bill Beaty wrote:
> 
> Ooooo, superneatocool!    These guys have discovered that a speckle-
> pattern made by a laser spot hitting a distant surface   ...is
> modulated with audio!

Laser bounced off window pane is older than god, curtains came right
after.  The Russkies did a pretty with a microwave resonater by Leon
Theremin in the Moscow US Embassy.

>   Let your laser hit the skin or clothing
> (or cellphone) of a very distant person, and you can tap into their
> conversation or listen to their heartbeat.  The CIA doesn't have to
> bounce lasers off windows anymore!  They can shine the spot on your
> head, and pick out just your voice (or use separate beams to record
> a few voices in a distant crowd.)

And use it for aiming and distancing the sniper, too.  Laser Ruby
Ridge for closure.
 
>   Simple optical setup detects speech remotely
>   Laser Focus World, Jan 2010,
>   http://tinyurl.com/laserbugZalevsky
> 
> Their PDF paper has some example .WAV files
> 
>   Simultaneous remote extraction of multiple speech sources and heart
> beats from secondary speckles pattern
>   http://tinyurl.com/ydgc97f
>   http://www.opticsinfobase.org/abstract.cfm?uri=oe-17-24-21566
> 
> They used high-framerate video and a correlation algorithm to do
> this.  The speckle pattern supposedly vibrates side to side at
> some angle.  We could stick a pair of photodiodes (or a line-
> array) behind a camera lens, shine the speckle on our diodes,
> then take a difference signal from adjacent ones.  (With some pairs
> the signal would be inverted.)  Rotate your camera to find the max
> audio.   Or  ...is it possible to hack an opto-mouse chip so it
> can give an audio output whenever vibrating laser-speckle shines
> upon its sensor array?  (And are those chip suppliers working on
> one of these even as we speak?  I would! )

So how come were getting our asses kicked in Afghanistan?  Hell,
everywhere.

-- 
Uncle Al 
http://www.mazepath.com/uncleal/ 
 (Toxic URL! Unsafe for children and most mammals) 
http://www.mazepath.com/uncleal/qz4.htm

On 2/5/2010 5:58 PM, Uncle Al wrote:
> Bill Beaty wrote:
>>
>> Ooooo, superneatocool!    These guys have discovered that a speckle-
>> pattern made by a laser spot hitting a distant surface   ...is
>> modulated with audio!
>
> Laser bounced off window pane is older than god, curtains came right
> after.  The Russkies did a pretty with a microwave resonater by Leon
> Theremin in the Moscow US Embassy.
>
>>    Let your laser hit the skin or clothing
>> (or cellphone) of a very distant person, and you can tap into their
>> conversation or listen to their heartbeat.  The CIA doesn't have to
>> bounce lasers off windows anymore!  They can shine the spot on your
>> head, and pick out just your voice (or use separate beams to record
>> a few voices in a distant crowd.)
>
> And use it for aiming and distancing the sniper, too.  Laser Ruby
> Ridge for closure.
>
>>    Simple optical setup detects speech remotely
>>    Laser Focus World, Jan 2010,
>>    http://tinyurl.com/laserbugZalevsky
>>
>> Their PDF paper has some example .WAV files
>>
>>    Simultaneous remote extraction of multiple speech sources and heart
>> beats from secondary speckles pattern
>>    http://tinyurl.com/ydgc97f
>>    http://www.opticsinfobase.org/abstract.cfm?uri=oe-17-24-21566
>>
>> They used high-framerate video and a correlation algorithm to do
>> this.  The speckle pattern supposedly vibrates side to side at
>> some angle.  We could stick a pair of photodiodes (or a line-
>> array) behind a camera lens, shine the speckle on our diodes,
>> then take a difference signal from adjacent ones.  (With some pairs
>> the signal would be inverted.)  Rotate your camera to find the max
>> audio.   Or  ...is it possible to hack an opto-mouse chip so it
>> can give an audio output whenever vibrating laser-speckle shines
>> upon its sensor array?  (And are those chip suppliers working on
>> one of these even as we speak?  I would! )
>
> So how come were getting our asses kicked in Afghanistan?  Hell,
> everywhere.
>
Could it be the N $ A has all their eyes and ears focused inside the US 
borders?

-- 
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Use only Genuine Interocitor Parts" Tom Servo  ;-P

Uncle Al wrote:
> Bill Beaty wrote:
>> Ooooo, superneatocool!    These guys have discovered that a speckle-
>> pattern made by a laser spot hitting a distant surface   ...is
>> modulated with audio!
> 
> Laser bounced off window pane is older than god, curtains came right
> after.  The Russkies did a pretty with a microwave resonater by Leon
> Theremin in the Moscow US Embassy.
> 
>>   Let your laser hit the skin or clothing
>> (or cellphone) of a very distant person, and you can tap into their
>> conversation or listen to their heartbeat.  The CIA doesn't have to
>> bounce lasers off windows anymore!  They can shine the spot on your
>> head, and pick out just your voice (or use separate beams to record
>> a few voices in a distant crowd.)
> 
> And use it for aiming and distancing the sniper, too.  Laser Ruby
> Ridge for closure.
>  
>>   Simple optical setup detects speech remotely
>>   Laser Focus World, Jan 2010,
>>   http://tinyurl.com/laserbugZalevsky
>>
>> Their PDF paper has some example .WAV files
>>
>>   Simultaneous remote extraction of multiple speech sources and heart
>> beats from secondary speckles pattern
>>   http://tinyurl.com/ydgc97f
>>   http://www.opticsinfobase.org/abstract.cfm?uri=oe-17-24-21566
>>
>> They used high-framerate video and a correlation algorithm to do
>> this.  The speckle pattern supposedly vibrates side to side at
>> some angle.  We could stick a pair of photodiodes (or a line-
>> array) behind a camera lens, shine the speckle on our diodes,
>> then take a difference signal from adjacent ones.  (With some pairs
>> the signal would be inverted.)  Rotate your camera to find the max
>> audio.   Or  ...is it possible to hack an opto-mouse chip so it
>> can give an audio output whenever vibrating laser-speckle shines
>> upon its sensor array?  (And are those chip suppliers working on
>> one of these even as we speak?  I would! )
> 
> So how come were getting our asses kicked in Afghanistan?  Hell,
> everywhere.

ABM systems not being cost effective against donkeys

-- 
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.theconsensus.org/ - A UK political party
http://www.blogtalkradio.com/onetribe - Occult Talk Show

On Feb 5, 2:08=A0pm, Phil Hobbs <pcdhSpamMeSensel...@electrooptical.net>
wrote:

> This is an ancient technique.

Hi Phil!   Bugging devices using laser speckle are ancient?

You sure about that?   Got a ref or two?   (And someone should
tell the OSA that they're announcing embarrassingly old techniques.)

> =A0The speckle pattern moves at twice the
> speed of the objects--it's been used to measure the motion of paper in
> hand-held scanners such as the HP Capshare 920 (circa 1996), and is the

So, then who first realized that we can use it for remote listening?


((((((((((((((((((((((( (  (    (o)    )  ) )))))))))))))))))))))))
William J. Beaty              Research Engineer
beaty, chem washington edu    UW Chem Dept,  Bagley Hall RM74
billb a eskimo com            Box 351700, Seattle, WA 98195-1700
ph206-762-3818                http://staff.washington.edu/wbeaty/

On Feb 5, 2:58=A0pm, Uncle Al <Uncle...@hate.spam.net> wrote:
> Bill Beaty wrote:
>
> > Ooooo, superneatocool! =A0 =A0These guys have discovered that a speckle=
-
> > pattern made by a laser spot hitting a distant surface =A0 ...is
> > modulated with audio!
>
> Laser bounced off window pane is older than god, curtains came right
> after. =A0The Russkies did a pretty with a microwave resonater by Leon
> Theremin in the Moscow US Embassy.
>
> > =A0 Let your laser hit the skin or clothing
> > (or cellphone) of a very distant person, and you can tap into their
> > conversation or listen to their heartbeat. =A0The CIA doesn't have to
> > bounce lasers off windows anymore! =A0They can shine the spot on your
> > head, and pick out just your voice (or use separate beams to record
> > a few voices in a distant crowd.)
>
> And use it for aiming and distancing the sniper, too. =A0Laser Ruby
> Ridge for closure.
>
>
>
> > =A0 Simple optical setup detects speech remotely
> > =A0 Laser Focus World, Jan 2010,
> > =A0http://tinyurl.com/laserbugZalevsky
>
> > Their PDF paper has some example .WAV files
>
> > =A0 Simultaneous remote extraction of multiple speech sources and heart
> > beats from secondary speckles pattern
> > =A0http://tinyurl.com/ydgc97f
> > =A0http://www.opticsinfobase.org/abstract.cfm?uri=3Doe-17-24-21566
>
> > They used high-framerate video and a correlation algorithm to do
> > this. =A0The speckle pattern supposedly vibrates side to side at
> > some angle. =A0We could stick a pair of photodiodes (or a line-
> > array) behind a camera lens, shine the speckle on our diodes,
> > then take a difference signal from adjacent ones. =A0(With some pairs
> > the signal would be inverted.) =A0Rotate your camera to find the max
> > audio. =A0 Or =A0...is it possible to hack an opto-mouse chip so it
> > can give an audio output whenever vibrating laser-speckle shines
> > upon its sensor array? =A0(And are those chip suppliers working on
> > one of these even as we speak? =A0I would! )
>
> So how come were getting our asses kicked in Afghanistan? =A0Hell,
> everywhere.
>
> --
> Uncle Alhttp://www.mazepath.com/uncleal/
> =A0(Toxic URL! Unsafe for children and most mammals)http://www.mazepath.c=
om/uncleal/qz4.htm

May I plug the book "Spycraft.". Lots of stories about such gear in
there. I've seen the paperback version in "remainders" at this point.
About $5.
http://ciaspycraft.com/
I just got a paperback to give away at Half Price books.
http://www.halfpricebooks.com/
Absolutely worth the read.

On Sun, 7 Feb 2010 21:51:26 -0800 (PST), Bill Beaty <b...@eskimo.com>
wrote:

>On Feb 5, 2:08 pm, Phil Hobbs <pcdhSpamMeSensel...@electrooptical.net>
>wrote:
>
>> This is an ancient technique.
>
>Hi Phil!   Bugging devices using laser speckle are ancient?
>
>You sure about that?   Got a ref or two?   (And someone should
>tell the OSA that they're announcing embarrassingly old techniques.)
>
>>  The speckle pattern moves at twice the
>> speed of the objects--it's been used to measure the motion of paper in
>> hand-held scanners such as the HP Capshare 920 (circa 1996), and is the
>
>So, then who first realized that we can use it for remote listening?

The Russians bugged the American Embassy in this manner back in the
1980s.

On 2/8/2010 12:51 AM, Bill Beaty wrote:
> On Feb 5, 2:08 pm, Phil Hobbs<pcdhSpamMeSensel...@electrooptical.net>
> wrote:
>
>> This is an ancient technique.
>
> Hi Phil!   Bugging devices using laser speckle are ancient?
>
> You sure about that?   Got a ref or two?   (And someone should
> tell the OSA that they're announcing embarrassingly old techniques.)

People publish old techniques all the time.  I've seen papers that 
reproduced things I did 15 years before, e.g. the invention of solid 
immersion microscopy.

I don't know about the bugging application, but the speckle business has 
been done to death since about the 1970s.

>
>>   The speckle pattern moves at twice the
>> speed of the objects--it's been used to measure the motion of paper in
>> hand-held scanners such as the HP Capshare 920 (circa 1996), and is the
>
> So, then who first realized that we can use it for remote listening?

No idea.  But speckle+TV as a sensitive measuring device is as old as 
the hills.

Cheers

Phil Hobbs