The general volume of background music in micro-classes is 40 decibels. Because the teacher’s speaking voice in the micro class is about 60 to 70 decibels, and adding background music to the micro class is just to increase the effect of the micro class and serve as a foil. The most important thing is the content of the micro class, so for the background The volume of music cannot exceed the volume of the micro class. Therefore, the general volume of background music in micro-lectures is 40 decibels, and the priority of background music and micro-lectures must be determined.