hall, central room
廳 centers on a large, important room within a building: a hall or central room, often used for official or formal gatherings.
廳 combines 广 (building) with 聽, which likely contributes the sound and the idea of listening, suggesting a place where official hearings or gatherings occur.
Under a roof 广, the complex inner shape 聽 suggests a formal space where people gather to listen and discuss: a hall or central room.
For チョウ, imagine a long-serving chief named Chou standing in the central hall, addressing the crowd: Chou -> チョウ.