Articulation Loss of Consonants
The measured percentage of Articulation Loss of Consonants by a listener. %ALCONS of 0 indicates perfect clarity and intelligibility with no loss of consonant understanding, while 10% and beyond is growing toward poor intelligibility, and 15% typically representing the maximum loss acceptable.
%Alcons can be estimated using:
r = distance of source and listener [m]
RT = reverberation time [s]
V = room volume [m3]
Q = directivity of a sound source
k = constant (for individual listener) = 1.5 ... 12.5 %