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【安防百科】安防监控监听头噪声很大该怎么降噪
作者:admin  10bet体育官方网站:2017-04-12 10:21:05
有时候安防监控拾音器监听头会有很大的噪声或质量低下。请查看以下几方面来降噪:
Sometimes the security monitoring pickup monitor head will have a lot of noise or low quality. Please see the following aspects to reduce noise:
1.本监听头不能运用开关电源供电,请运用优异的12V一般直流稳压电源。您能够选用专供的监听头优异电源或适配器来供电。
1 the monitor can not use the switching power supply, please use the excellent 12V DC power supply. You can use the power supply or adapter designed to monitor power supply.
2.假如音频线接到其它音频设备,请断开衔接后直接衔接到随身听耳机/电脑用的一般有源音箱进行测验。假如噪声不见阐明监听头自身没有问题,请查看衔接的音频设备或别的方面。
2 if the audio line is connected to other audio devices, disconnect the adapter and then connect directly to the headset / computer for the active speaker. If the noise is not clear, there is no problem with the monitor itself. See the audio device or other aspects of the connection.
3.查看噪声是不是因为声响自激造成的:监听用的音箱必定不能与监听头靠得太近,尽量不要在同一个房间进行测验。因为监听头的灵敏度高,音箱的声响反应到监听头的麦克风必然会致使声响自激啸叫。同一个房间需要监听,能够运用头戴式耳机。
3 check whether the noise is caused by the sound of the self - excitation: the monitor must not be too close to the monitor head, try not to test in the same room. Because of the high sensitivity of the monitor head, the sound of the speaker's response to the microphone will inevitably lead to the sound of the sound of the whistle. The same room needs to be monitored and can be used with a headset.
4.布线时最佳单独走线,不要同交流电等强电运用同一缆槽,一起尽量远离变压器、灯具整流器等强电磁搅扰设备。运用3X0.5RVVP屏蔽电缆也能有用防止外界搅扰,其间要求屏蔽层单端接地)。
4 wiring when the best single line, do not use the same power cable, such as alternating current with the same cable trough, as far as possible away from the transformer, lamp rectifier and other strong electromagnetic interference equipment. The use of 3X0.5RVVP shielded cable can also be useful to prevent external interference, which requires a single shield grounding.
5.严禁把监听头接入声卡、调音台、功放等设备的麦克风(MIC)输入端,不然也许损坏设备。这是因为监听头内部尽管也包括麦克风,但一起也包括扩大、降噪、回声处理等电路,其输出的为1Vpp以上的“LineOut”音频信号。
5 is prohibited to monitor the head into the sound card, mixer, power amplifier and other equipment of the microphone (MIC) input, or may damage the equipment. This is because the monitor head, although it also includes a microphone, but also includes the expansion, noise reduction, echo processing and other circuits, the output of more than 1Vpp LineOut audio signal.
6.有的视频监视器自带喇叭,但也许作用差,请运用优异耳机或有源音箱进行监听。
6 some video monitor comes with a horn, but perhaps the effect is poor, please use excellent headphones or active speakers to monitor.
7.某些计算机主板上的集成声卡质量较差,录音时会致使严峻噪声,请改用创通等品牌的优异独立声卡。
The poor quality of some 7 computer integrated sound card on the motherboard, the tape will cause severe noise, please use a sound card independent excellent brand.
8.查看监听头声响增益电位器或扩大设备的音量是不是调理适宜。
8 see the monitor head sound gain potentiometer or expand the device's volume is not suitable for conditioning.
9.有的品牌音频分配器质量不高,会致使声响发闷、裂化等,请选用优异分配器或本公司的监听头适配器。
9 some of the quality of the brand audio splitter is not high, will cause the sound boring, cracking, etc., please choose the excellent distributor or the company's monitor adapter.
10.某些类型的硬盘录像机只注重视频处理而疏忽音频处理也许致使同步录像的声响质量低下。请先断开硬盘录像机,然后直接用优异耳机或有源音箱接到音频线上去听。如果音质极好,就能够断定监听头质量没有问题。
10 some types of hard disk recorders only focus on video processing while ignoring audio processing may result in poor sound quality of synchronized video recording. Disconnect the hard disk video recorder and then listen to the audio line directly with an excellent headset or active speaker. If the sound quality is excellent, it is possible to determine the quality of the monitor head no problem.
11.假如承认噪声源于环境,能够选用APM212降噪型适配器来有用过滤环境噪声。
11 if the recognition of noise from the environment, the use of APM212 noise reduction adapter can be used to filter the noise of the environment.


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