ISO 140-1:1997/Amd 1:2004 声学.建筑物和建筑构件的隔声测量.第1部分:能抑制侧向传声的实验室试验装置的要求.修改件1: 轻型双叶隔板用开度测试框架的特殊要求
Acoustics - Measurement of sound insulation in buildings and of building elements - Part 1: Requirements for laboratory test facilities with suppressed flanking transmission; Amendment 1: Specific requirements on the frame of the test opening for lightwei