A microphone aimed at listening at a distance

Microphones of directional action consist of a diffuser, and also an amplifier. Many modifications are used by special services. Modern devices are manufactured with filters and without them. Many modifications can boast of high sensitivity. If you believe the experts, the model is more expedient to buy with two lithium batteries.

The minimum threshold frequency is 300 MHz on the average. The sensitivity at the impedance does not exceed 3 mV. Many models use two amplifiers. The conductivity of the sound signal in this case increases quite strongly. On the market, a directional microphone for professionals costs about 12 thousand rubles.

How to make your own hands?

To make a directional microphone with your own hands, you first need to do the installation of the diffuser. Many experts recommend using diode devices in this situation. The average sensitivity is 4 mV. It's also worth noting that a microphone will require a small filter that will cope with impulse noise. Amplifiers are better to choose a low-frequency type.

The energy consumption of them is not too high. Also worth noting that they are compact and do not take up much space in the device body. Directly the battery is installed behind the diffuser. To increase the conductivity of the signal, it is recommended to use a constant adapter.

Device parameters King EH031

These feedback microphones are mostly positive. If you believe the experts, the conductivity of the signal in the device is quite high. A qualitative amplifier deserves special attention. This microphone uses a linear type. The protection system is used in class PP40.

The working humidity of the microphone of this series is at the level of 40%. If you believe the experts, then low frequencies are perceived by the diffuser without problems. Foreign objects significantly reduce the quality of audibility. This directional microphone at a distance of up to 130 meters works remarkably. Linear audio output in this case is available. There is a modification in the area of 8800 rubles.

Microphones of King EH035 series

This directional microphone for wiretapping is made with two dipole transistors. The amplifier is standardly used by the low-frequency type. The impedance sensitivity is 3.3 mV. If you believe the experts, then the conductivity of the signal at low frequencies is quite high.

The Explorer at the modification is in the back of the device. It is also worth noting that the model is equipped with an excellent protection system of class PP42. All this indicates that the modification is capable of operating at a distance of more than 130 meters. The audibility of the voice at high frequencies is quite high. Special attention should be paid to the compact size of the microphone. The price for this product starts from 13 thousand rubles.

Features of modifications King EH040

The microphone (directional) of the presented series is distinguished by a high quality of audibility at low frequencies. The filter of the modification is used with a diode adapter. If you believe the experts, the diffuser has a low conductivity signal. Also worth noting that the model has problems with rapid discharge. The battery in the device is of lithium type, and it is designed for five hours of operation. He has an extremely small energy reserve. The amplifier in the model is of poor quality. It is worth the device in stores about 12,300 rubles.

Device parameters Shure SV200

This microphone (directional) is great for listening at a distance of more than 100 meters. If you believe the experts, then low frequencies are heard wonderful. The adapter for the microphone is selected quite high quality. It is also worth noting that the diffuser is able to work at high humidity. A small filter deserves special attention, which filters out unnecessary sounds.

Interference of foreign oscillations, it filters quite qualitatively. However, there are still drawbacks in the device. With high frequencies at a great distance, the model copes poorly. Linear audio output in this case is missing. It is also worth noting that the model is quickly discharged. At the same time, the battery indicator sometimes burns out. There is a modification in our time about 14,300 rubles.

Shure SV300 Series Microphones

This microphone (directional) is most suitable for working at a distance of not more than 140 meters. The conductivity of the signal at low frequencies is rather high. At a distance of up to 80 meters, the audibility of the voice is very good. The adapter for the battery is in this case chosen by the dipole type. The diffuser of this microphone uses only one. To connect headphones, a linear coaxial output is used. Also, the modification has a 3.5 mm connector. The sensitivity of high frequencies in this case is 3.3 mV.

If you believe the experts, then for professionals the device does not fit the best way. The indicator of inclusion in the model is absent. It is also worth noting that the diffuser does not handle the increased frequencies well. The adapter for linear video output in the device is missing. The battery is not indicated by the manufacturer. It is worthwhile this directional microphone for wiretapping at a distance of 10-11 thousand rubles.

Features of modifications of Rode NTG-2

This microphone (directional) is made with two diffusers. If you believe the experts, then the conductivity of the signal at low frequencies is quite high. At a distance of up to 100 meters, the audibility of the voice is good. The filter for impulse noise is not present in this case. It is also worth noting that the amplifier for the microphone is matched without an adapter.

Speaking about the connection, it is important to mention the presence of a coaxial connector. The line audio output of the modification is also available. The audibility of high frequencies at a great distance is not very good. The sensitivity of the amplifier is at the level of 2.2 mV. If you believe the experts, then for professional use the microphone is not particularly good. Also it should be noted that there is no cover in its kit. It is worth a directional microphone for wiretapping at a distance of about 14 thousand rubles.

Device parameters Samson R23S

This is a compact and high-quality microphone. If you believe the experts, the model is often used by special services. Operating humidity of the device is 44%. At temperatures over 45 degrees it is prohibited to use it. The diffuser of the modification is of the diode type, and the adapters for it are matched with two contactors. The filter of the model is normally set to low-frequency type. Directly the amplifier is used with a low-impedance adapter.

The threshold sensitivity parameter reaches a maximum of 4.3 mV. If you believe the experts' arguments, then the model copes remarkably well with wiretapping at a distance of more than 150 meters. Failures in the operation of the amplifier are quite rare. The microphone protection system is used in class PP40. The price for this model starts from 10 thousand rubles.

Samson R25S Series Microphones

This is a professional and high-quality microphone. If you believe the experts, then the conductivity of the signal at low frequencies is acceptable. It is also worth noting that the device is allowed to be used in wet weather. Linear output KE in this case is used.

Another device has a 3.5 mm connector. The microphone battery uses a lithium type of 2 A. If you believe the experts' arguments, then the model does not cope with high frequencies in the best way. Filters for the modification are used with copper insulators. In terms of size, the microphone is compact. The price for it starts at 9,300 rubles.

Features of the Sennheiser XSW 12

This microphone is not suitable for listening at a short distance. The impulse noise filter is of poor quality. However, it is worth noting the compactness of the modification. The adapter to the microphone is fixed very reliably. The sensitivity is not more than 3.2 mV.

Also worth noting that the model rarely breaks the diffuser. The battery is only applied to 3 A. The protection system is used in class PK40. The operating humidity of this microphone is at 34%. Buy the user can for 8300 rubles.