Automation of the logatom intelligibility measurements in rooms

Speech intelligibility is one of basic quality parameters of speech transmission in rooms.
The methods for assessment of speech quality fall into two classes: subjective and objective
methods. This paper includes an overview of selected methods of subjective listening measurements
(ACR – Absolute Category Rating, DCR – Degradation Category Rating, speech
intelligibility) recommended by ITU-T, ISO and Polish Standard and the method of speech
transmission quality evaluation called “modified intelligibility test with forced choice” (MITFC).
The MIT-FC method provides fully automatized measurement of speech intelligibility
in rooms. The experiments carried out in finding the relations between logatom intelligibility
measured with traditional and theMIT-FC methods for the rooms have shown that there exists
the multivalue and repetitive relation between them.