Selection criteria

Let’s analyze the general and key selection criteria, which should be taken into account when buying a device for information security, consistently, highlighting them in the form of a list:

Type of interference. Dictaphone recorders are divided into two types: ultrasonic and acoustic. In the first case, the device emits an ultrasonic wave, which affects the membrane of the microphone. The disadvantage – is the need to direct the beam in the direction of the alleged place of laying of microphones and recorders (or buy more of them: otherwise providing complete protection of the room will not succeed). In the second case, the device emits sound noises and generates a “speech chorus”: then nothing but noise is heard in the recording. A significant advantage: the technique directs beams in all directions (360 degrees). Often such jammers have the function of blocking not only microphones but also laser data acquisition devices. To enhance the effect of suppression sometimes connected acoustic devices are. Not without its disadvantages: broadcast interference does not interfere with the conversation, but is caught by the human ear.
Range. The distance at which ultrasonic or acoustic waves travel is measured in meters and can vary over a wide range. Some devices provide “drowning” in a small radius (a few meters), others in a radius of tens of meters, and others in a radius of several hundred meters.
Control. Progressive recorder jammers provide the possibility of manual adjustment: you will be able to choose the mode and power according to the individual situation. If the device is used for different tasks and in different places, you can not do without such functionality.
Frequencies. The range of suppressed frequencies is a key selection criterion, since devices that record sound can work differently. For example, not every device provides “jamming” the microphone from a regular phone. Often it is necessary to exclude cellular networks, Wi-Fi, and GPRS.
Size and format. If you need a hidden microphone suppressor, it is logical to pay attention to small-sized devices. A separate subclass – masking suppressors, capable of imitating other equipment and not causing unnecessary suspicion. Note that professional suppressors are larger in size than usual because they have a special display with working information.

Voice recorder jammers

The peculiarity of audio recording devices such as voice recorders, radio microphones, etc. is that it is quite problematic to detect them. Unlike transmitting devices (bugs, wiretaps, etc.) dictaphones cannot be found with anti-bugs or field detectors. The issue can be solved with voice recorder suppressors, which are used to ensure the confidentiality of information during negotiations, meetings, etc. Sound recorder suppressors can be acoustic and silent. The first type of silencers are characterized by the fact that while working they generate audible speech-like or white noise, which is mainly recorded on the dictaphones. It is impossible to understand the speech of the interlocutors in this noise. More modern models have a completely silent operation, but the principle remains the same.

Voice recorder and cell phone jammers

Sometimes speech jammer is combined with wireless suppressors, such as cell phones. Thus it is possible to comprehensively solve the issue of data protection, because as you know the data can be obtained not only by recording conversations on a dictaphone, but also by installing spyware on cell phones, as well as with the help of wiretaps based on gsm frequencies.

However, most often, voice recorder jammers are separate devices, which work with the help of microwave radiation. Cell phone jammers have a different working principle: they generate interference on cellular operator’s frequencies, so that operator’s network becomes inaccessible, and it is impossible to transmit information via the gsm channel.

Ideally, when holding important meetings, it is best to have both devices at the same time, which can protect all information from any threat sources.

Radio microphone jammer

Radio microphone jammers are designed to block the transmission from the microphone to the receiver. A radio microphone is a device that amplifies transmitted sound by converting acoustic vibrations into electrical vibrations. Radio microphones, which are used by intruders to intercept information, use narrowband modulation. Radio microphones are quite complex devices, which have many components, so there are several ways to protect against information leakage through them:

• Generation of interference to transmit and record speech or white noise in which you cannot make out a conversation;
• Blocking the data transmitter on the radio channel that is used in the microphone by means of a signal jammer.

In addition, conventional devices operating on adjacent or ideally the same radio frequencies can interfere with radio microphones. Sale of Jammers and GPS Jammers – GPS Protection Devices – https://www.jammer-store.com/gps-blockers-jammers/

Recording jammers

In addition to the above division of recording jammers you can divide them in two other ways:

1. Acoustic jamming devices (just these are further divided into acoustic and silent). These devices generate noise (either voice, from different sets of sounds, pre-recorded and repeatedly superimposed speech of the owner, or white noise, which is a monotonous hiss).
2. Ultrasonic noise suppression devices generate safe sound waves at ultra-low and ultra-high frequencies. This blocks the recording of conversations on dictaphones.

What is the best speech jammer to buy?

When choosing wireless signal suppressors and voice recorders, first of all, pay attention to the manufacturer. Buying on sites such as aliexpress, you run the risk of coming across a low-quality suppressor, assembled by handicraft method. In this case, you risk your health and property. So choose only products that are produced in factories. At the same time, in most cases intruders use wireless data transmission channels, so most often it is enough to have a wireless data transmission blocker on hand. In any case, whatever you choose, we recommend contacting the site consultants to select the right product.

Technical maintenance of motor vehicles
Maintenance includes the following types of work:

• cleaning and washing;
• control-diagnostic;
• fasteners;
• lubrication;
• refueling;
• adjusting;
• electrical;
• other works, performed mainly without disassembly of units and removal of individual units and mechanisms from the car.

If during maintenance is not possible to verify the full serviceability of individual units or mechanisms, they should be removed from the car for diagnostics on special stands and devices.

Maintenance is divided into the following types, according to the frequency, list and labor intensity of the work performed:

• daily maintenance (TO);
• first technical service (TO-1)
• second technical service (TO-2);
• seasonal maintenance (SA).

Each type of technical maintenance (TS) includes strictly defined list of works or nomenclature of operations. These operations are divided into two parts:

• control, which is a mandatory operation;
• performing operations is performed as required.

To get complete information about the technical condition of the vehicle, a diagnostic is carried out, which is part of the technical maintenance process.

Daily maintenance

Performed daily between shifts, when the car returns from the line and includes:

• inspection and inspection work of the mechanisms and systems responsible for the safety of movement, bodywork, cab, lighting devices;
• cleaning and drying and wiping operations;
• refueling the vehicle with fuel, oil, compressed air and coolant;
• washing the vehicle on demand, depending on weather, climate and sanitary requirements, as well as the requirements for the appearance of the vehicle.

Oil Change

First maintenance

TO-1 consists of performing a full:

external technical inspection of the entire vehicle
control-diagnostic, fixing, adjusting, lubrication, electrical and fueling work with the check of the engine, steering, brakes and other mechanisms.
To diagnose the mechanisms and systems that ensure the safety of the vehicle is a set of diagnostic work (D-1), which is performed at or before the TO-1.

TO-1 is carried out periodically at set intervals on the mileage and should ensure trouble-free operation of units, mechanisms and systems of the car within the established periodicity.

In-depth diagnostics (D-2) is carried out one or two days in advance to provide information about the condition of the vehicle at the station where TO-2 will be carried out, and if a large amount of work is found, the vehicle is redirected to the current repair area.

Brake check

Second technical service

TO-2 is carried out with the car taken out of operation for 1-2 days and includes the performance in the prescribed amount of fixing, adjusting, lubricating and other work, as well as checking the operation of units, mechanisms and devices in the process of operation.

As mentioned above, D-1 diagnosis is intended mainly to determine the technical condition of units, assemblies, systems of the car ensuring traffic safety. For diagnostics D-1 of mechanisms ensuring traffic safety, fast automated tools for diagnostics of brake mechanisms and steering control are required.

Before and during the D-2, the necessary preparatory work in accordance with the adopted diagnostic technology, such as: pumping tires, installing the vehicle on the test bench, connecting the sensors, warming up the engine and other units to working temperature, etc.

To diagnose the car as a whole and its components are required test benches with running drums to determine the power and economic indicators, the state of systems and units, as well as the conditions of diagnosis, as close as possible to the conditions of the car. For combined diagnostics of maintenance and repair should be used mobile and portable diagnostic tools and instruments.

Steering Diagnostics

Seasonal maintenance

Seasonal maintenance is carried out twice a year and is a preparation of the rolling stock for operation in cold and warm seasons. It is recommended to carry out separate maintenance for the rolling stock operating in the cold climate zone. For other climatic zones, the SS is combined with TO-2 with the corresponding increase in labor input of the main type of service.

Preparation of a vehicle for winter
Automobile repairs
According to the provision there are two types of repair of cars, units, assemblies:

• current repair (TR), carried out in motor transport enterprises;
• Overhaul (KR), performed at specialized enterprises.

Current repair
The repair is carried out at service stations and consists in elimination of minor malfunctions and failures in operation of the vehicle. This allows you to close all the problems, according to the norm mileage before the overhaul.

Diagnosis during the current repair is carried out to identify the failure or malfunction and find the best way to fix it, for example, on the spot, with the removal of the unit or units with their complete or partial disassembly, as well as adjustments. Current repair consists of disassembly, assembly, locksmith, welding and other work, as well as replacement of parts in units (other than basic) and individual units and assemblies in the car that require current or major repairs.

In the current repair units and assemblies on the car is replaced only if the time required to repair the unit or component exceeds the time required for its replacement.

Overhaul
CR vehicles, units and components carried out at specialized repair enterprises, plants, workshops. It includes restoration of serviceability of cars and units until the next overhaul. Write-off of vehicles occurs at 80% of the mileage standards for new cars and units.

During the overhaul of a car or unit, it is completely disassembled into units and parts, which are then repaired or replaced. After all the parts are replaced, the units are assembled, tested and sent for car assembly. The overhaul method assumes that the car is assembled from the previously repaired units.
After an overhaul, diagnostics is performed, the purpose of which is to verify the quality of the overhaul.
During the entire service life, the vehicle usually undergoes one overhaul.