北京饭店新楼的客房门,需要有隔音装置,以防走廊上的噪音通过门缝串入客房。因此,除了在门框上安装密闭橡胶条外,还在门下槛安装了由北京市合页厂和北京市建筑设计院研制成功的自落门槛,用以挡住门下之空隙,既可以隔音,又可以挡风和防尘。其装置见图1。 The room door of the Beijing Hotel’s new building needs soundproofing to prevent noise in the corridor from entering the room through the door. Therefore, in addition to installing sealed rubber strips on the door frames, the self-dumping thresholds successfully developed by the Beijing Heping Factory and the Beijing Architectural Design Institute were also installed under the doors to block the gaps under the doors. Wind and dust. The device is shown in Figure 1.