Now most universities, high schools, even junior high schools and primary schools have multimedia teaching classrooms, which is a modern way of education. The characteristic of multimedia classroom is that the classroom is relatively large, so it will produce echo and reverberation, so it needs to do sound absorption and sound insulation.

The commonly used sound-absorbing materials for the walls of multimedia classrooms are: class A2 fire-retardant sound-absorbing board, Class B1 fire-retardant sound-absorbing board, and the two-year popular use: environmental protection polyester fiber sound-absorbing board. Of course, there are some customers in order to save costs using the non-environmental E2 level miscellaneous board. It causes a bad smell in the classroom, and it's hard for teachers and students to stay in it.

School multimedia classroom because the sound of multimedia is relatively loud, it will also affect the next classroom, so it also needs to do sound insulation. Common sound insulation materials are: 15mm sound insulation board, 3mm sound insulation felt, 50mm high-density sound insulation cotton.