Title
Validation of the revised STI-r method
Author
Steeneken, H.J.M.
Houtgast, T.
Publication year
2002
Abstract
The revised model for the speech transmission index (STIr, Speech Communication 28 (1999) 109), was validated with an independent set of 68 test conditions. For a subset of 18 conditions, including only additive noise and band-pass limiting, it was veri.ed that the STIr provides a good prediction of the CVC-word score. The additional 50conditions included non-linear distortion, echoes, automatic gain control, and waveform coding. For conditions with these types of distortion speci.c parameters of the test signal are of interest. The parameters of the STI model were tuned in an earlier study for an optimal .t between the traditional STI and the CVC score, for a similar set of transmission conditions [J. Acoust. Soc. Amer. 67 (1980) 318]. It was found that the parameter settings also apply to the present revised model. The prediction accuracy for both male and female speech is 4-6% when expressed in CVC-word scores. This corresponds to a signal-to-noise ratio of about 1-2 dB.
Subject
Acoustics and Audiology
Objective measure
Speech intelligibility
Speech transmission index
Validation
Acoustic noise
Amplitude modulation
Mathematical models
Signal to noise ratio
Speech transmission index
STI
Speech communication
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TNO identifier
11514
Source
Speech communication, 38 (3-4), 413-425
Document type
article