Adjustment of the sound of the video conferencing system

Adjustment of the sound of the video conferencing system

Sound is an integral part of the video conferencing system, and its adjustment method is related to the size of the venue, the design of the environment, and the sound quality of the sound source. In order to obtain a good sound reproduction, it is necessary to fully and properly use the tuning and sound amplification equipment to make the sound bright, full and strong. The adjustment of the sound should be based on the quality of the sound source and the environment of the local venue, so as to reduce the distortion of the sound to a minimum. In the audio debugging process, common problems are mainly reflected in the following aspects:

1.The echo is accompanied by sound. This is caused by the signal sent from the far end to the far end. The echo control can be turned on by the conference terminal control software. If the signal sent from the far end is mixed by the mixer and returned to the far end, The echo is generated, and the received and sent sounds are isolated by the auxiliary strong cut function, so that AUX OFF is turned off; for the desktop mixer, the signals of the auxiliary outputs (AUX1, AUX2) are controlled, if the AUX2 outputs When the signal is sent to a video recording device (such as a hard disk recorder or a video tape recorder), the level of the road is adjusted, and the AUX1 output level is adjusted to the minimum position, so that the signal sent from the far end cannot be fed to the far end.

2.The sound is accompanied by "乞, 乞" sound. The reason is that the microphone level of the local end is too high or the level of the high frequency band is too high. For the cause of the microphone level being too high, the push rod of the control microphone can be slightly pulled down to reduce the input level of the microphone; for the level caused by the high frequency band being too high, the treble knob can be appropriately adjusted to reduce The level of the high frequency part.

3.The sound at the receiving end is too small. This is mainly because the volume adjustment of the local end is not appropriate. It can be solved by increasing the volume in the terminal control software, increasing the audio signal sent from the far end in the mixer, and increasing the volume in the power amplifier. In addition, it is necessary to control the sound pressure of the entire venue, and increase the volume in a gradual manner. Do not adjust quickly, otherwise it will easily damage the equipment. In addition, the tone of the sound source (treble, midrange, bass) should be selectively adjusted, and the midrange and bass should be appropriately increased to obtain a full and strong vocal effect.

4.The local voice whistling (self-excited). This is the sound of the speaker fed to the microphone, which forms a positive feedback circuit between the speaker and the microphone. The main reason is that the microphone is too close to the speaker or the microphone is pointing to the speaker. In the event of self-excitation, the input level of the microphone or the volume of the power amplifier must be turned off quickly, otherwise the device may be damaged. It can be eliminated by changing the direction of the microphone and moving the microphone away from the speaker.

5.Tenveo video conferencing system can be interconnected with well-known brand devices such as ZTE video conferencing system, Polycom video conferencing system,and Huawei video conferencing system.