Play mahjong on the first floor and add sound insulation board. Can you hear the sound on the second floor?

Sound insulation board is used to reduce the spread and diffusion of sound, and reduce the sound propagation effect by blocking the propagation path of sound waves. Therefore, when the sound insulation board is installed on the first floor, the sound generated by the mahjong room will be limited to a certain extent, reducing the possibility of sound propagating upward to the second floor.