An office environment has the following speech and backgroun

An office environment has the following speech and background noise levels in dBA. What is the Articulation Index, AI, for this office environment?

Solution

Consider weighing factors for one octave band based calculation of Articulation indexes for the typical male voice level at 1 m.

Now to calculate Articulation Index;

Now;

AI = (306+850+1800+1498+1992)/10000 = 0.6446 = 64.46 %

Source for weighing factors : The science and applications of acoustics, Daniel R Raichel, Springer science