ISO 140-1:1997/Amd 1:2004
聲學.建筑物和建筑構件的隔聲測量.第1部分:能抑制側向傳聲的實驗室試驗裝置的要求.修改件1: 輕型雙葉隔板用開度測試框架的特殊要求
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