| 摘要 |
PROBLEM TO BE SOLVED: To provide a soundproof door which can obtain both air permeability and high sound isolation performance.SOLUTION: Vent holes 5, 6 are provided on both sides of a hollow door body 2. A partition member 7 is inserted in the door body. The partition member is provided with plural partition walls 7b extending in a direction orthogonal to the ventilating direction and each partition wall has a through hole 7a bored therein. An interval W between the partition walls 7b is set so as to generate a standing wave for reducing the sound of a predetermined frequency. |
