The Principle and Precautions of The CCTV Microphone

  • source: sizheng;
  • Time: 2019-07-15

The CCTV audio mic is a sound collection device for synchronizing the video and audio recording system. Figuratively speaking: the CCTV camera is the eye, and the CCTV mic is the ear. The simple CCTV audio mic is composed of a microphone and an amplifying circuit. Therefore, the CCTV mic and the microphone have a big difference in circuit design. The CCTV audio mic can be directly connected to the DVR, the active speaker, the earphone, the sound card, etc., and the microphone needs to be connected to the power amplifier. The difference in the circuit design principle is that the CCTV mic is not the same as the device connected to the microphone. The difference in the location of the application leads to the difference in the area monitored by the microphone and the CCTV audio mic. In general, the CCTV mic used for monitoring is designed to be highly sensitive and omnidirectional, while the microphones are sensitive and directional, and they must be aligned.

Most of the surveillance CCTV audio mics on the market are designed to be three-wire, red (power positive), white (audio positive), and black (common). For the wiring method, please refer to the wiring method of our previous article.

the-principle-and-precautions-of-the-CCTV-microphone

CCTV audio mic safety precautions

1. Do not use it in a place that passes through the water source. Only use a damp cloth to clean the surface.

2. Do not spray liquid on the CCTV mic, as this will destroy the CCTV mic circuit.

3. Install the CCTV audio mic according to the user manual.

4. Do not install the CCTV mic in a place with a heat source, such as a microwave oven, electric heater, stove, power amplifier, etc.

5. Do not remove the power protection ground wire, make sure that the power supply will not be squeezed or stepped on, especially at both ends of the power cable.

6. Try to use the correct power accessories or annex.

7. Use it with standard professional audio equipment to get the most out of it.

8. When installing, make sure that the mobile cable does not harm the device or the human body.

9. If you don't use it for a long time, please save the device.

 

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