| 摘要 |
An elevator cab ceiling ( 22 ) includes an upper ceiling panel ( 26 ), a lower ceiling panel ( 28 ), and a ventilation channel ( 30 ) extending between the upper ceiling panel ( 26 ) and the lower ceiling panel ( 28 ). The ventilation channel ( 30 ) extends at an oblique angle relative to the upper ceiling panel ( 26 ) and separates space between the upper ( 26 ) and lower ( 28 ) ceiling panels into an upper cavity ( 32 ) and a lower cavity ( 34 ). A plurality of partitions ( 36 ) are formed within at least one of the upper ( 32 ) or lower ( 34 ) cavities. In one example, an acoustically resistive element ( 42 ) extends at least partially along a portion of the ventilation channel ( 30 ). The plurality of partitions ( 36 ) and the acoustically resistive element ( 42 ) cooperate to reduce noise levels transmitted into an elevator cab ( 10 ) via the ventilation channel ( 30 ). |
