Generally, there are the following reasons for the problem of audio lag: the speaker is interfered with, the interface or connecting cable is in poor contact, the quality of the audio itself is poor, etc. Generally speaking, most speakers are active speakers, and there must be an amplifier inside them, so noise is inevitable. The noise from active speakers can be roughly divided into electromagnetic interference, mechanical noise and thermal noise according to the source. Electromagnetic interference can be mainly divided into power transformer interference and stray electromagnetic wave interference.

Sound refers to other sounds besides human language and music, including the sounds of the natural environment, the sounds of animals, the sounds of machine tools, and various sounds emitted by human movements.

Audio may include power amplifiers, peripheral equipment (including compressors, effectors, equalizers, VCDs, DVDs, etc.), speakers (speakers, speakers), mixers, microphones, display equipment, etc. plus Get up a set. Among them, speakers are sound output devices, speakers, subwoofers, etc.