Talking about the sound quality of audio, it can be measured from the following aspects. Clarity. The beautiful sound quality is very clear, with good transparency, and every word can be heard clearly. Fullness. Medium and low voices are abundant, and high pitches are moderate. If the reverberation time is short, especially the reverberation time of the low frequency band is shorter than that of the mid frequency band, its fullness will not be too good; the output frequency characteristic of the audio system is poor, and the mid-low sound is lacking, such a sound will appear Thin and weak, not full.