| 摘要 |
PURPOSE:To provide a sound isolating door exhibiting a high isolating performance in all frequency regions. CONSTITUTION:A hollow panel is formed equipped with an air layer between two surface plates 2, 2, and the air layer is provided with a sash 11 containing each surface plate 2 through a vibration isolating sheet 12 whose loss coefficient is >=0.5, and thereby the natural flexural frequency of the surface plates is shifted to the high tone side. The natural flexural frequency of the surface plates and conduction of solid vibration between these surface plates fore and aft are suppressed by the mentioned sheet 12 furnished between the sash 11 and surface plates 2, and the sound isolating performances in the middle and high tone regions are kept in favorable conditions. |
