The quality of sound can be measured from the following aspects. Clarity. The beautiful sound quality is very clear, transparent, and every word can be heard clearly. Full. The middle and low voices are abundant, and the high voice is moderate. If the reverberation time is short, especially the reverberation time in the low frequency band is shorter than that in the medium frequency band, its fullness will not be too good; The output frequency characteristics of the sound system are poor, and the sound will be thin and weak without middle and low sound.

A sense of balance. It refers to the right and left loudspeakers, the proportion of output power between main loudspeakers and auxiliary loudspeakers, and the correctness of phase. The left and right channels of stereo sound are consistent, and the sound image is normal. If the sound and image are sometimes biased and not harmonious, it is not a good sound quality.

Sense of environment. The sound has a good sense of space. It gives a vivid feeling. It is most appropriate to describe good sound quality with empathy. Loudness. In terms of loudness, good sound quality is suitable and comfortable.