Which aspects of the conference system should be adjusted?
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Reasonable scheme configuration plus standard installation and construction can only be said to be half successful. In order to obtain the ideal conference sound reinforcement effect, it is inseparable from the final professional system adjustment. Compared with other sound reinforcement systems such as performance reinforcement, the conference system has its unique focus. 
1. Processing of sound quality Since the most important sound source of a conference system is a speech signal, and the microphone head is mostly capacitive, therefore, sounds with a frequency lower than 100 Hz that affect speech intelligibility can be selectively removed, that is, a high-pass filter (HPF) is used. ), the low-frequency part of the cut is also conducive to eliminate the proximity microphone condenser microphone effect. In addition, the control of microphone timbre and volume should also be properly set, because too strong and excessive volume in the medium-high frequency can cause hearing discomfort.
2. Feedback suppression In order to fundamentally suppress feedback, it is not only necessary in the early stage to select the type and installation layout of the speaker according to the actual situation of the conference space, but also to make corresponding adjustments to the conference system. For the problem of feedback inhibition, please refer to the article “Feedback suppression of live sound reinforcement†(published in “Performance Science and Technology†No. 8 2012), and no further details are provided here.
3. Environmental noise filtering In addition to vocal and external sound source signals in the conference system, other sounds such as footsteps, air-conditioning fan sounds, tea cup bumps and paper sounds need to be isolated as much as possible. These sounds are amplified and transmitted through the sound reinforcement system. This will affect the sound quality of the conference and even affect the atmosphere of the conference. Therefore, in the initial stage of system design, it is necessary to do a good job in the conference pickup mode and equipment selection. In addition, it is also necessary to combine existing equipment to optimize local conditions, such as rational placement of various types of microphones, noise sampling and synchronization filtering of peripheral control equipment, and rational setting of externally connected equipment with noise gates. The combination of steps and equipment is adjusted to remove the ambient noise as much as possible.
4. Selection of Conference Mode Regardless of the type of conference system configuration, the conference mode needs to be refined according to user requirements to meet the actual use characteristics of the conference site. For example, the more commonly used conference speech modes such as automatic mixing, highest authority, first-in, first-out, request for speech, and ID card identification, can be reasonably configured according to the conference format, and the characteristics and performance of each conference system can be fully utilized. .
Conclusion:
The system of a good conference is not only reflected in the hardware equipment and the normative construction and installation, but also reflected in the debugging of the whole system. A set of well-tuned conference systems will be more than just a matter of hardware. The conference system will have a lot of effect. I hope that the content discussed today can help everyone.