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    HD-18D Disc-type anti-riot high-fidelity noise reduction pickups

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      Pointing characteristics: Omni-directional
      Indoor and outdoor: outdoor installation
      Shell material: aluminum alloy
      Installation: ceiling mounting, wall mounting, buried wall mounting
      Industry applications: judicial prisons, financial banks, public pro
    • 介绍说明
    • 产品参数
    • 产品尺寸

    1、Specifically designed for outdoor security booths, traffic patrol police booths and other industry users synchronized monitoring and recording, the original imported kit assembly.

    2, strong, durable and beautiful metal shell, surface electroplating treatment, away from the interference of noise around the environment.

    3, Peak Fire professional recording interview omnidirectional sound head, 50 square high fidelity, high sensitivity, high bandwidth, no noise.

    4, waterproof, moisture-proof, dustproof performance, rainwater environment can work normally for 48 hours, in line with IP 65 standards.

    5, D.A.D.S. (double-layer air buffer system) structure, reproduce the voice stretching freely.

    6、Digital noise reduction signal processing circuit, improve the sex-to-noise ratio and can reduce the distortion formed by phase shift.

    7, unique Dolby omnidirectional logic surround sound standard design, built-in high-speed voice DSP processing unit, two-level dynamic noise reduction processing.

    8、All shielding structure design, to eliminate external electromagnetic interference, to meet a variety of environmental installation.

    9, pickup built-in lightning protection, power supply polarity reversal protection and power protection module.

    10, ultra-long audio signal transmission technology, using RVVP2 × 1.5 mm2 shielded cable transmission 1 km without distortion.

    11, integrated professional SMT audio processor, can directly drive active speakers, hard disk recorders, recorders, etc.

    12、Passed the inspection of the Quality Inspection Center of Security and Police Electronic Products of the Ministry of Public Security.

    13、Obtained the patent certificate of the State Intellectual Property Office of the People's Republic of China.

    14、Won the computer software copyright of the National Copyright Administration of the People's Republic of China.

    Pickup range: 50 square
    Pickup head: recording interview pointing head
    Pointing characteristics: Omni-directional
    Sensitivity:-44 dB (10.0 mV e 1V at 1 Pa)
    Signal-to-noise ratio:66 dB (1 kHz at 1 Pa)
    Distortion 1:≧ 0.3% (74dB sound pressure, A-weighted)
    Distortion 2:≧ 1.2% (110dB sound pressure, A-weighted)
    Maximum Sound Pressure:120dB Sound Pressure (1 kHz ≤ 3% THD, A-weighted.)
    Frequency Response:150Hz ~ 12kHz (90dB SP, A-weighted)
    Audio output value: 2.5 Vpp/90dB sound pressure (A-weighted)
    Signal processing: Dynamic voice Dynamic voice processing
    Dynamic range:78 dB (1kHz at Max dB SPL)
    Output impedance: 600 to 1000 ohms unbalanced
    Protection circuit: polarity protection, misconnection protection, lightning protection
    Connection: three-wire system: power line (red), audio (white), common ground (black)
    Signal transmission: 3000 meters twisted pair, shielded cable (electromagnetic complex environment please use shielded cable or transmitter)
    Power supply voltage: linear regulated power supply DC 9V-20V (12V recommended)
    Electromagnetic compatibility:Comply with GB 9254-2008
    Reliability index:MTNF≧80000hours
    Dimensions:54mm(diameter)×24mm(height)
    Comply with the standard: in line with the standard EU CE standards, the United States FCC certification, the highest prosecution synchronous recording system construction specifications

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