BACKGROUND NOISE GENERATION DEVICE

To solve the problem that although there are devices, as conventional arts, that provide a resistance device inside an air supply hole formed on an outer wall of a building to generate background noise, the devices cannot be adopted in a room facing an outer wall and no air supply hole, and provide a background noise generation device that can realize an indoor environment in which it is difficult to hear daily sound from the outside even in a room having an outer wall and having no air supply hole.SOLUTION: A background noise generation device comprises a duct 16C that directs air from the outside of a building to rooms of the building, and a resistance device 1X provided inside the end part of the duct 16C nearer to a room 12 and serving as resistance when air passes through the inside of the duct 16C.SELECTED DRAWING: Figure 3 【課題】従来、建物の外壁に形成された給気孔の内側に抵抗装置を設けて暗騒音を発生させる装置が知られているが、外壁に面して給気孔がない部屋には採用できない。そこで、外壁に面して給気孔がない部屋であっても室外からの生活音が聞こえ難い室内環境を実現できるようにした暗騒音発生装置を提供する。【解決手段】本発明に係る暗騒音発生装置は、建物の外部から空気を建物内の部屋に導くダクト１６Ｃと、ダクト１６Ｃの部屋１２に近い側の端部側の内側に設けられてダクト１６Ｃの内側に空気が通過する際の抵抗となる抵抗装置１Ｘとを備えたことを特徴とする。【選択図】図３