Journal
INTERNATIONAL JOURNAL OF AUDIOLOGY
Volume 49, Issue 6, Pages 444-454Publisher
TAYLOR & FRANCIS LTD
DOI: 10.3109/14992021003681030
Keywords
Speech intelligibility; Psychometric function; Speech reception threshold; Sentence matrix test; Speech-in-noise
Funding
- European Union [004171 HEARCOM]
- State Ministry of Science and Education
- Polish-Norwegian Research Fund
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The purpose of this study was to develop the Polish sentence matrix test (PSMT) to measure intelligibility of speech presented against a background noise The PSMT consists of five columns containing 10 names. 10 verbs, 10 autocrats, 10 adjectives, and 10 nouns Since each word was available as a separate sound file. it was possible to generate different sentences by juxtaposing randomly selected words taken from respective columns This approach allows 100 000 unique sentences of a fixed grammatical structure to be generated The speech reception threshold (SRT), i e the signal-to-noise ratio (SNR) providing 50% speech intelligibility and S-50, the slope of an intelligibility function at the SRT point, were shown to be 9 6 dB and 17 1 %/dB, respectively Note that in this study dB is regarded as dB SNR, otherwise reference is given PSMT was also evaluated using an adaptive 1-up/1-down staircase procedure in investigations with and without participation of an experimenter No significant differences were shown for SRTs obtained in these investigations
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