| 摘要 |
PROBLEM TO BE SOLVED: To provide a soundproof structure for sound from the outside to the inside of a door, especially for sound from a drain hole on a door bottom.SOLUTION: A drain hole 11 for discharging water having entered inside a door 1 is opened on a bottom of the door 1. A soundproof material 12 is disposed on the bottom of the door 1 so as to cover the drain hole 11 from an upper part. The soundproof material 12 blocks outer sound noise entering from the drain hole 11 so that the sound noise is not transmitted to an upper part of the inside of the door 1. The soundproof material 12 absorbs also sound noise entering from other places into the door 1 so as to reduce sound noise. |
