Key Features of SIZHENG QD55 cctv audio microphone
1.COTT-QD55 circular HD audio monitoring microphone, 360°monitor pickup, capture the surrounding small sound.
2.The structure of new housing and metal net design is simple and fashion, to make an impression.
3.Built-in AGC and DTS noise reduction signal processing circuit, automatically adjust high strength voice and instantaneous impact sound.
4.Built-in newest DNP and DSP digital processing unit, enhance sensitivity to highlight human voice.
5.Built-in micro adjustment potentiometer, has a keen front sensitivity, its back snap-in type meet a variety of environmental installation.
6.The echo cancellation technology of international leading level, effectively reduce serious echo of empty room.
7.ATDA dynamic noise level detection, adaptive bandpass filter, effectively prevent the speech signal distortion and attenuation.
8.Long audio signal transmission technology, use the RVVP3*0.5mm2 shield cable, it is distortionless within 3km.
9.Integrated professional front audio amplifier circuit, direct drive active speakers, DVR, earphones, etc.
10.Widely used in banks, schools, interrogation rooms, prison and other indoor environment for synchronous video audio monitor recording.
Specifications of SIZHENG QD55 cctv audio microphone
|Audio Monitor Range||10-80 square meters (adjustable)|
|Audio Transmission Distance||3000m|
|SNR||70dB(1m40dB)40dB(10m40dB) 1KHz at 1Pa|
|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,
3 leading wires
|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|
|Place of Origin||Guangzhou, China|
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