BLOGS

26

2023

-

04

When the sound system and lighting system are operating simultaneously, the communication noise of the sound system is high

Author:


(1) The sound system and lighting system are powered independently; (2) The isolation transformer shall be used for the power supply of the audio system, and the power of the isolation transformer shall be greater than the power of the audio system;

When the sound system and lighting system are operating simultaneously, the communication noise of the sound system is high, but when the lighting system is turned off, the sound of communication cannot be heard when the sound system is operating. The sound system and lighting system share the same single-phase power supply. The working current of the thyristor in the lighting system is high, and it is an AC pulse type. It is directly coupled to the input end of the expansion device through the power lead, thereby generating a large amount of AC sound. Solution:
(1) The sound system and lighting system are powered independently;
(2) The isolation transformer shall be used for the power supply of the audio system, and the power of the isolation transformer shall be greater than the power of the audio system;
During the sound reinforcement process, one or two sets of speakers at the left and right channel entrances suddenly become silent;
In general, it is due to the overload of the power amplifier or the burning of the speaker due to excessive sound power. Solution:
(1) Replace the amplifier or speaker;
(2) Replacing the high-power transistor with a heterojunction pair to repair the power amplifier must be noted that this situation is caused by overload. When tuning, high attention should be paid to operational issues. To protect the amplifier or speaker, it is possible to consider adding a limiter to the sound reinforcement system, which can cause significant AC noise when operating simultaneously