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Old October 14th 06, 07:12 PM posted to comp.sys.ibm.pc.hardware.storage,alt.comp.hardware,sci.electronics.equipment,rec.radio.amateur.misc
Dana Dana is offline
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First recorded activity by RadioBanter: Oct 2006
Posts: 49
Default How detect if MP3 player is recording in your room? [OT]


"kony" wrote in message
...
On Fri, 13 Oct 2006 19:39:11 -0800, "Dana"
wrote:


"kony" wrote in message
.. .
On Fri, 13 Oct 2006 16:40:03 -0800, "Dana"
wrote:


"kony" wrote in message
.. .
On Fri, 13 Oct 2006 14:37:33 -0800, "Dana"
wrote:


You have not established that the signature (difference) of
such a device can be discriminated from a different device.

It is being done today.


What "it"?

Devices are being discriminated by their signature.
Various sensors are doing this.

Do you know how many MP3 players are out there?


Yeah, so what. There are devices that can detect semiconducter junctions.
MP3 players have semiconductor junctions, hence they can be detected.



No, you can detect semiconductor junctions then


And mp3 players have semiconducter junctions, hence they can be detected.


Now how about the phones that can record?


They also have semiconductor junctions, hence they can also be detected.


A theory about
what might be possible someday, is not same thing as what IS
being done today.


Semiconductor junctions can be detected today.


Again, it's pointless.


No, it will tell the OP that electronic devices that can may be able to
record his converstaionare present.




You seem to be vaguely claiming it's possible without really
considering EXACTLY what is necessary.


Hogwash.
You seem not to understand what can be done with electronics.



There are some devices that use the priciples of a MRI and shrink it down

to
a hand held sized device to scan for explosives.


Ok, but again, it doesn't tell us the purpose of common
items like plastic, or semiconductors. Explosives aren't
going to be used in practically everything that plugs into a
wall or takes a battery.


But the signatures of plastic, batterues can be put into a library and the
scanner will then alert you of there presence.


Since the compounds in
explosives give off a unique signature after being exposed to a strong
magnetic field, that signature is then stored in memory.


Maybe some, but not all will give off a magnetic field.


It is not the magnetic field that is being detected, it is the signature
emitted when exposed to a magnetic field. IE when the molocules return to a
normal state, they emit a signature.


Now your sensor
emits a magnetic field, and the reciever looks for the signature of the
explosives.



So it is only a matter of expanding your signature library, and your
receiver can be programmed to look for pretty much anything.


Nope,


Yep


This is only one of many new tools that are out.
The semiconductor junction detector has been out for around 30 years.