By hanging panels of soundabsorbing felt on the walls, Sabine reduced the echo enough to make the hall usable.
通过在墙上悬挂吸音板，Sabine 减少了足够的回声，使大厅可用。
2
Cork. Soundabsorbing expanded pure agglomerated cork in slabs. Characteristics.
软木。板状吸音纯膨胀粘合体。特性。
3
The data he compiled yielded a mathematical formula for the relationship between a room's echo duration, its quantity and quality of sound-absorbing materials, and its spatial volume.