Directional microphones consist ofdiffuser, as well as an amplifier. Many modifications are used by special services. Modern devices are made with filters and without them. Many modifications can boast high sensitivity. If you believe the experts, the model is better to buy with two lithium batteries.
Minimum threshold frequency on averageis 300 MHz. Impedance sensitivity does not exceed 3 mV. Many models use two amplifiers. The conductivity of the sound signal in this case increases quite strongly. In the market, a directional microphone for professionals costs about 12 thousand rubles.
How to do it yourself?
To make a directional microphone your ownhands, you need to first install the diffuser. Many experts in this situation recommend the use of diode devices. The average sensitivity indicator for them is on average 4 mV. Also worth noting is that the microphone will require a small filter that will cope with impulse noise. Amplifiers it is more expedient to select a low-frequency type.
Расход энергии у них не слишком высокий.It is also worth noting that they are compact and will not take up much space in the device. Directly the battery is installed behind the diffuser. To increase the signal conductivity, it is recommended to use a constant adapter.
Device parameters King EH031
Data directional microphones reviews inmostly get positive. If you believe the experts, the signal conductivity in the device is quite high. Special attention deserves a quality amplifier. With this microphone, it is applied linear type. The protection system is used class PP40.
Operating humidity of the microphone in this seriesis at 40%. If you believe the experts, the low frequency diffuser perceived without problems. Foreign objects significantly reduce the quality of hearing. This directional microphone works great up to 130 meters. Line audio output in this case is available. There is a modification in the region of 8800 rubles.
King EH035 Series Microphones
This directional microphone for interceptionproduced with two dipole triodes. The amplifier is used as standard low-frequency type. The impedance sensitivity index is 3.3 mV. If you believe the experts, the signal conductivity at low frequencies is quite high.
The modification guide is in the back.devices. It is also worth noting that the model is equipped with an excellent protection system of the PP42 class. All this suggests that the modification is able to work at a distance of over 130 meters. The audibility of the voice at high frequencies is quite high. Special attention is given to the compact size of the microphone. The price of this product starts from 13 thousand rubles.
Features modifications King EH040
Microphone (directional) of the presented seriesIt is characterized by high quality of hearing at low frequencies. The filter at modification is used with a diode adapter. If you believe the experts, the diffuser has a low signal conductivity. It is also worth noting that the model has problems with fast discharge. The battery in the device is of lithium type, and it is designed for five hours of work. Energy reserve is extremely small. The amplifier is used in the model of low quality. The device costs about 12,300 rubles in stores.
Shure SV200 Device Settings
This microphone (directional) is wonderfulSuitable for wiretapping at a distance of over 100 meters. If you believe the experts, the low frequencies are heard perfectly. Adapter under the microphone matched pretty high quality. It is also worth noting that the diffuser is able to work at high humidity. Special attention is given a small filter that eliminates unnecessary sounds.
Interference from extraneous vibrations it filterspretty high quality. However, there are still flaws in the device. The model copes poorly with high frequencies at a great distance. Line audio output in this case is missing. It is also worth noting that the model is quickly discharged. In this case, the battery indicator sometimes burns out. There is a modification in our time about 14 300 rubles.
Shure SV300 Series Microphones
This microphone (directional) mostsuitable for work at a distance of no more than 140 meters. The conductivity of the signal at low frequencies is quite high. With a distance of 80 meters, the audibility of the voice is very good. The adapter for the battery in this case is selected dipole type. There is only one diffuser for this microphone. For connecting headphones, a linear coaxial output is used. Also, the modification has a 3.5 mm jack. The sensitivity of high frequencies in this case is 3.3 mV.
If you believe the experts, then for professionalsThe device is not suitable in the best way. The inclusion indicator at model is absent. It is also worth noting that the diffuser does not cope well with higher frequencies. Adapter for linear video output in the device is missing. The battery charge indicator is not provided by the manufacturer. This directional microphone stands for wiretapping at a distance in the range of 10-11 thousand rubles.
Features modifications Rode NTG-2
This microphone (directional) is made with twodiffusers. If you believe the experts, the signal conductivity at low frequencies is quite high. At a distance of 100 meters audibility is good. The filter for impulse noise in this case is missing. It is also worth noting that the microphone amplifier is selected without an adapter.
If we talk about the connection, it is important to mentionabout the presence of a coaxial connector. Linear audio output modification is also available. 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, for professional use the microphone is not particularly good. It should also be noted that the cover is not provided in its set. There is a directional microphone for wiretapping at a distance of about 14 thousand rubles.
Parameters of Samson R23S devices
This is a compact and high-quality microphone.If you believe the experts, the model is often used by special services. The working humidity of the device is 44%. At temperatures above 45 degrees it is prohibited to use it. The diffuser of the modification is applied diode type, and adapters for it are selected with two contactors. The filter in the model is set to the standard low-frequency type. Directly amplifier is used with a low-resistance adapter.
Threshold sensitivity parameter maximumreaches 4.3 mV. If you believe the arguments of the experts, the model perfectly copes with wiretapping at a distance of over 150 meters. Malfunctions in the amplifier are observed quite rarely. Microphone protection system applies 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, the signal conductivity at low frequencies is acceptable. It is also worth noting that the device can be used in wet weather. Linear output KE in this case is used.
The device also has a 3.5 mm jack.The battery at the microphone is used lithium type for 2 A. If you believe the arguments of experts, the model does not do well with high frequencies. Filters for modification are applied with copper insulators. The microphone is compact in size. The price for it starts from 9300 rubles.
Features of the model Sennheiser XSW 12
This microphone is not suitable for interceptiona short distance. The impulse noise filter is applied of poor quality. However, it is worth noting the compactness of the modification. Adapter to the microphone is attached very securely. The sensitivity index is no more than 3.2 mV.
Also worth noting is that the model rarely breaksdiffuser. The battery is used only on 3 A. The protection system is applied class PK40. The operating humidity of this microphone is at 34%. Buy the user can for 8300 rubles.
