Key Features of SIZHENG QD50 cctv audio microphone
1.Using UniGuard RFI shielding technology, prevent radio frequency interference, control noise of surrounding environment.
2.Adopt cross spiral type sound hole, its internal resonance spoke after precise calculation, the sound is more clearly.
3.Using honeycomb type to eliminate reflex phase distortion, control the echo, provide clear and high quality audio signal output.
4.Built-in AGC and DTS noise reduction signal processing circuit, automatically adjust high strength sound and instantaneous impact sound.
5.Unique design of the "electronic noise dynamic closed loop suppression circuit", completely eliminate "hiss" electronic noise.
6.Built-in lightning protection, power supply polarity reverse connect protection, ESD protection and power protection module.
7.Integrated professional front audio amplifier circuit, direct drive active speakers, DVR, earphones, etc.
8.Applicable to public security organs interrogation room, prisons, finance, education and other places of synchronous video audio monitoring recording.
Specifications of SIZHENG QD50 cctv audio microphone
|Audio Monitor Range||5-100 square meters (adjustable)|
|Audio Transmission Distance||3000m|
|Dynamic Range||104dB (1KHz at Max dB SPL)|
|Max Sound Pressure||120dB SPL(1KHz,THD 1%)|
|Output Impedance||600 ~ 1000Ω non-equilibrium|
|Microphone||High fidelity silver plated vibration membrane capacitor microphone|
|Signal Processing Circuit||DSP,AGC,ALC|
|Protective Circuit|| Lightning protection, power supply polarity reverse connect protection,
|Connection Way|| 3 leading wires
(red lead is power+, white lead is audio signal+, black is power-&audio signal-)
|Transmission Cable||RVVP3*0.5mm2 shield cable|
|Supply Voltage|| DC10V~18V
(recommend to use 12V, more than 500 meters recommended 15V)
|Housing Material||Advanced resin PVC+Spray Germany FLAYER diffusion coating|
|Place of Origin||Guangzhou, China|
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5.Please check your goods on the shipping company when you receive the goods.