Automation of the logatom intelligibility measurements in rooms

Abstract

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.