No matter in school or company, there will be multimedia equipment in the meeting room of the meeting, naturally including sound. At the time of opening the conference, no one wanted to have noise during the conference. Generally speaking, there must be an amplifier inside the conference speaker, so noise is inevitable.
When debugging audio in a conference room, there are often various types of interference noise affecting the sound effects, resulting in poor sound at the conference. To deal with noise, we need to understand the source of noise before we can manage its roots.
1. External noise
During the initial construction of the conference room, most of the outside noise can be basically solved, sound insulation treatment can be done, and the cooling sound of the equipment needs to be processed later. First of all, select a high-quality silent cooling fan, and then the surrounding equipment is good Sound processing, the final installation location of the device as far as possible in the corner position.
2. Background noise
After the device is turned on, the speaker emits a sizzle sound. Under normal circumstances, these noises will only be heard when they are close to the speakers, which will not affect the acoustics of the conference room. One is the product quality problem, and the other is the level mismatch when debugging. You can gradually check, first open the device to listen to the noise, and then open the previous equipment. If it is opened to a certain device, the noise suddenly becomes larger, then this device has quality problems, and the replacement of the device is sufficient. If the noise of the equipment on the rear side is very large, and the noise after that does not change much, then it is the quality of the equipment on the rear side. Replace the equipment. If you open the last equipment, then the noise gradually increases, it is the level mismatch problem, you need to adjust the input level. For example, the input signal of the mixer is too small. In order to hear the normal signal, the power amplifier increases the output, and the noise increases significantly. If the input signal is normal, the noise amplification is small, and the noise is naturally small.
3. Current noise
When using a table plug or a docked computer to put sounds, there will be a stinging current; the computer will not receive a normal sound from the projection, and the projection will have a loud current; the computer will not receive a normal sound. There are humming currents in the power supply; in these three cases, the equipment is not grounded in common, and the potential difference between the devices is generated. By using an unbalanced audio cable, the audio system is amplified to generate noise; if all the grounding is done, it cannot be done. If you accept everything else, if the wiring cannot be moved, buy a noise eliminator. If you still can't, you need to change the wiring.
MAONO is an innovative designer and manufacturer of Lavalier, Podcasting, Wireless, Shotgun, Recording microphones and accessories for Smartphone, Camera and PC, etc.