The homeowner enjoys playing mahjong with friends over the weekends but is concerned about disturbing other people in the house and wants to ensure a satisfying gaming experience. To address these concerns, they specifically purchased Blue Whale professional soundproof doors, aiming to achieve optimal sound insulation. After installation, the results were highly satisfactory. Our store personnel even conducted a test by closing the door and found that they could only faintly hear the faint sound from the room, making it difficult to discern the content or the sound of the mahjong game.