Calculate Ceiling Absorber Positions

Ceiling absorber positions?

At what positions should ceiling absorbers be attached to mitigate early reflections?

The point ...

… at which the angle of incidence equals the angle of reflection of the sound on the ceiling is the same represents the suitable position for the ceiling absorbers. These remove the first reflections and thus improve the spatial sound. Additional absorbers before and after can help to further optimize the room acoustics.
 
Unit of measurement:
Decimal separator:
Room height (mm):
Valid range: 2000 - 5000 mm
Seating distance to the wall (mm):
Seating distance to the front wall.
Valid range: 2000 - 10000 mm
Seating distance to front speakers (mm):
Seating distance to the front speakers.
Valid range: 2000 - 10000 mm
Front speakers ground distance (mm):
Distance from the front speakers to the floor, measured from the tweeter
Valid range: 200 - 2000 mm
Note
Distance to the front wall
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