Critical distance#
Diffuse-field critical distance
Critical distance estimates where direct and diffuse reverberant levels are equal. Room Analysis uses Q = 1 for the reference case.
- r_c
- Statistical critical distance (m)
- Q
- Directivity factor; one for the reported reference case (dimensionless)
- V
- Effective analysis volume (m³)
- T₆₀
- Statistical reverberation time (s)
H. Kuttruff and M. Vorländer (2024), Room Acoustics, seventh edition.
Critical distance estimates where direct and diffuse reverberant levels are equal. Room Analysis uses Q = 1 for this reference calculation, rather than the directivity of a selected ray source. The ROOM interface lets you select Q to adjust the displayed treated and untreated estimates without changing the stored Q = 1 reference. It does not locate an exact boundary in a non-diffuse room.