Listen to a conversation indoors from the street

[Частный детектив. Владивосток.]

Nemoy, I wrote to you in PM, take a look ...

 

[Oberon]

Hello everybody ! Do not take it for a joke. About 2 - 3 years ago, my friend returned from Moscow and from (it seems the Children's World) brought a small box in which there were different personal belongings: a parabola, a microphone with a pin on the end of it, some kind of black box, a battery case and headphones. Maybe there was something else, but I don’t remember. So with this thing (only a very accurate tip) we listened to what nariks bazaar was in the neighboring house, which was located 75–80 meters away. We really didn’t guess to listen in the opposite direction, it wasn’t before that (well, you understand). Until the evening, we successfully sold it. It was only later that it dawned on us that the thing had been sold. But the fact is that they bought it in a simple store, like a children's toy. Now we recall this and scold ourselves that we sold the thing for a penny.

Igor ... just forgive ...: oops: but I don’t quite understand .... maybe there was some smoking powder in the box .... then you could hear at 700m: lol:: lol:: lol: and into space to fly away .... Once again I'm sorry - a joke

Well no. That's right. I myself bought a similar little thing in Moscow. It appears in the description as a directional microphone "Hare Ear" and is intended for observation and recording of songbirds, such as. : lol: Really normally works up to 80-100 meters in the field. The city is very disturbed by traffic noise. True, it doesn’t write for long, on the built-in flash memory for 30 seconds. But there is a 3.5 jack output to the recorder + for aiming at the object, the built-in monocular with 10X magnification is used.
One minus - it’s not very ergonomic construction.

 

[Oberon]

The Telesystem representative has something to offer ...?

I am in Murmansk, and Telesystems in Moscow. I have been using their products for many years. In addition, for example, the Israeli police have been officially purchasing their devices for 6 years. Therefore, I can only positively recommend it.

I also use their devices for the past 7 years. Well, well, I’m constantly surprised - they’re soldering awesome devices manually (I saw their video on YouTube). Well done guys, at least you can be happy for them.

 

[Oberon]

Really. There are special devices that convert waves from glass vibrations. Sit and listen. If of course there is no protection.

And if there is protection - you can just use a stethoscope .
True, you can earn in your ear, but this is the cost of curiosity: lol:.
Yours faithfully

This can be done in several ways, depending on the level of access to the window frame. A laser room listener is expensive and not very common. Whoever has the skills, you can assemble a medium-complexity circuit on IR emitting devices. It works on the same principle as the BOB, the range of removal of 20-25 meters from the glass. But it’s easier to do with an ordinary radio bug, instead of a microphone, a piezoelectric element is used that sticks directly to the glass and camouflages accordingly. Or the same simple transmitter with a needle-type microphone, which is inserted through the window frame through a plastic tube with a diameter of 2.5 mm. If the frame is plastic - generally a song!
But this is me, for general development, since these actions are completely illegal. : mrgreen: You can earn not only in your ear, but also in real time. Therefore, I propose to protect the ears and often use the substance that is between them. : lol:

 

[Частный детектив. Владивосток.]

This can be done in several ways, depending on the level of access to the window frame. A laser room listener is expensive and not very common. Whoever has the skills, you can assemble a medium-complexity circuit on IR emitting devices. It works on the same principle as the BOB, the range of removal of 20-25 meters from the glass. But it’s easier to do with an ordinary radio bug, instead of a microphone, a piezoelectric element is used that sticks directly to the glass and camouflages accordingly. Or the same simple transmitter with a needle-type microphone, which is inserted through the window frame through a plastic tube with a diameter of 2.5 mm. If the frame is plastic - generally a song!
But this is me, for general development, since these actions are completely illegal. : mrgreen: You can earn not only in your ear, but also in real time. Therefore, I propose to protect the ears and often use the substance that is between them. : lol:

Informative ...
I liked the substance too!

 

[Oberon]

Informative ...
I liked the substance too!

Thank you for the friendly review. What I understand, then voiced. Still, in the now distant past, the special operations support department. Swam - we know. : lol:

 

[Anonymous]

This can be done in several ways, depending on the level of access to the window frame. A laser room listener is expensive and not very common. Whoever has the skills, you can assemble a medium-complexity circuit on IR emitting devices. It works on the same principle as the BOB, the range of removal of 20-25 meters from the glass. But it’s easier to do with an ordinary radio bug, instead of a microphone, a piezoelectric element is used that sticks directly to the glass and camouflages accordingly. Or the same simple transmitter with a needle-type microphone, which is inserted through the window frame through a plastic tube with a diameter of 2.5 mm. If the frame is plastic - generally a song!
But this is me, for general development, since these actions are completely illegal. : mrgreen: You can earn not only in your ear, but also in real time. Therefore, I propose to protect the ears and often use the substance that is between them. : lol:

Informative ...
I liked the substance too!

You know, I was lucky to work on an apparatus manufactured by Rode & Shwarz, which costs about $ 300,000. I will definitely say that in urban conditions, trying to listen to the room through the glass by registering the micro-vibrations of the glasses is just as empty an undertaking as trying to call from a space station using a cell phone. Here you need to consider several points:
1. All systems for the collection of information by the method of recording microoscillations of glass are devices manufactured in the 80s. In the future, they tried to improve these systems, but according to my data, their production has now been phased out everywhere, since the current level of industrial noise makes the use of this expensive equipment inefficient.
2. In order to listen to a room using this method, you need a room opposite to where the PC should be located (control point). At the same time, between the control object (listening room) and the equipment installed in it (transmitter + receiver) should not be more than 50 meters and no obstacles, i.e. in a PC, the window should be open constantly or in some other way, the absence of glass should be ensured.
3. The separation angle between the transmitter and the receiver should be provided, as a rule, at least 30 gr. Depending on the distance to the monitoring object, this requires that 2 or even 3 windows of the control point go out to the controlled object, otherwise it will not always be possible to ensure the separation angle .
4. If modern double-glazed windows with a triple glazing system are installed in a controlled room, then even at night, reading information will be extremely complicated, and the sound quality is just awful.
5. Despite the fact that the so-called "laser microphones" operate in a spectrum of 940 nm laser radiation that is invisible to the human eye; there are a bunch of cheap visualizers of laser radiation, including working in automatic mode, with the help of which such devices are calculated in 10 seconds. At night, the operation of the "laser microphone" is easy to calculate using a conventional analog home camcorder. Considering that all consulates and embassies are equipped with equipment to counteract the technical means of obtaining information, the use of "laser microphones" in itself does not make sense. Accordingly, it is unjustified to use such expensive equipment with the involvement of highly qualified specialists who can work on it to listen to small criminals. Therefore, she went down in history ...
6. The use of such devices is justified only in a remote Siberian village, where there are no industrial noises and triple glazed windows.
7. Ultimately, all intelligence agencies in the world use cheaper options for obtaining information, including Do not disdain conducting thermorectal cryptanalysis )

 

[Частный детектив. Владивосток.]

7. Ultimately, all intelligence agencies in the world use cheaper options for obtaining information, including Do not disdain conducting thermorectal cryptanalysis )

Damn, they would write right away, a soldering iron in the ass ... I already climbed into Google, bl ... what kind of analyzer I was looking for ...: lol :: lol :: lol:

 

[Анатолий Маланченко]

6. The use of such devices is justified only in a remote Siberian village, where there are no industrial noises and triple glazed windows.

In a remote Siberian village, all conversations become publicly available so quickly! : D

 

[Oberon]

"" Ultimately, all world intelligence cheaper information options including Do not disdain conducting thermorectal cryptanalysis )

So what is it about. There is no need to multiply entities, as one Franciscan monk bequeathed. : lol:
Jamesbond successfully uses cool spy bells and whistles only in movies. In our case, you can get by with more mundane methods.
And thermorectal cryptanalysis, alas, is not our method. : lol: