How position the sound absorber for best result

Functional demands Acoustics
  1. The sound absorbers in the ceiling determine the reverberation time, since the ceiling area is normally the largest reflecting surface in a room.
  2. Sound absorbers in the perimeter area along the walls are particularly important to reduce reverberation and to avoid cue-ball reflections.
The positioning of sound absorbing systems has a significant impact on how the sound is propagated and reduced. In large open spaces (e.g. sports halls or play and activity rooms in daycare), sound scattering surfaces or objects must be installed so that the sound absorbing capacity of the acoustic ceiling is fully utilized. This can, for example, be achieved by installing sound absorbers partly on the walls.
Wall-mounted sound absorbers can also be used to avoid flutter echo between parallel walls.
Another phenomenon is the so-called cue-ball reflection, which can appear when two reflective surfaces meet in a corner. If the distance between the sound source and the corner is large enough, a very clear and disturbing echo will be heard at the source position. This can be avoided by covering one of the surfaces with a sound absorber all the way to the corner.

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