Glass structures are often designed to please the eye, in that they can provide exciting views through interesting constructions. This objective conflicts with the effect that glass structures have on room acoustics: hard surfaces result in an increase in reverberation time and in higher sound levels, with a conflict between the eye and the ear that can sometimes be difficult to resolve. Using free-hanging units is a way of avoiding this, since they provide sound absorption that shortens reverberation time and reduces sound levels yet not obstructing views or natural light from the sky.
Using free-hanging units as “clouds” will not block daylight through a glass ceiling. Since the free-hanging units are exposed to sound from both sides, the absorption efficiency is increased compared to the one-sided exposure of a wall-to-wall ceiling, compensating to some extent the smaller surface area of free-hanging units. Since the sound pressure is somewhat higher close to the walls and corners of a room, it is often an advantage to install absorbent material in these areas. However, in rooms with glass facades and glass ceilings, it is often not desirable to install absorbers close to these surfaces. The benefit of corner location is compensated to a certain degree by the double-sided exposure of free-hanging units and the relative increase in absorbing efficiency due to the division of the absorbers into smaller units VERTIKAL. For free-hanging units, the proximity to corners is not a critical issue.