acoustic ventilation duct 3d model

Design a functional acoustic ventilation duct replacing a 57 x 35 cm window panel. Depth 12–18 cm. Include an airtight mounting frame. The design MUST include a clearly defined continuous airflow path from exterior to interior. Add a visible air intake opening on one side and an outlet on the opposite side. Inside, create a forced airflow labyrinth with 4–6 turns using solid baffles that block straight-line sound but leave open gaps for airflow. Ensure all chambers are connected and air can pass through the entire system. Reserve a central chamber sized for two 120 mm PC fans with mounting holes. Fans must be placed inline with airflow (not blocked). Add space for acoustic foam along walls, but do not obstruct airflow channels. Include angled exterior louvers, drainage holes, and a removable filter slot. Ensure internal channels are wide enough for real airflow and clearly visible in the model. Optimize for modular FDM 3D printing