Difference between sound insulation and sound absorption (distinction)

What is the difference between sound insulation and sound absorption ?

Different uses and different materials.

1.The purpose of the sound absorbing material is to specialize in processing low-frequency noise in the room, and it is often used in places such as conference rooms, auditoriums, libraries, swimming pools, studios, hotels, etc., which means places with high sound absorption. Applying. Sound insulation board is a kind of sound insulation material that reduces indoor decibels, and is applied to bars, KTV, night clubs, discos, factories, etc.

2.Materials The sound absorbing board is made of porous material and the sound insulation board is made of high density material, so it is difficult for sound to enter.