Experimental comparison between speech transmission index (STI) and mean opinion scores (MOS) in rooms

Stefan Brachmanski

Experimental comparison between speech transmission index (STI) and mean opinion scores (MOS) in rooms

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Stefan Brachmanski Wrocław University of Technology, Institute of Telecommunications, Teleinformatics and Acoustics, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

Abstract

Two methods for assessment of speech quality in rooms were compared: the speech transmission index (STI) and mean opinion scores (MOS). Subjective and objective measurements were carried out in two rooms for different signal to noise ratio within a range from −15 dBA to +15 dBA. The obtained results are shown as a curve describing a relation between a MOS, STI and signal to noise ratio (S/N).

Keywords:

speech quality, STI, room acoustic.

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Experimental comparison between speech transmission index (STI) and mean opinion scores (MOS) in rooms

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