Institute of Acoustics, A. Mickiewicz University, Poznań, Poland.
Int J Audiol. 2010 Jun;49(6):444-54. doi: 10.3109/14992021003681030.
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 numerals, 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.
本研究旨在开发波兰句子矩阵测试（PSMT），以衡量在背景噪声下的言语可懂度。PSMT 由五列组成，分别包含：10 个名称、10 个动词、10 个数字、10 个形容词和 10 个名词。由于每个单词都有单独的声音文件，因此可以通过随机选择来自各个列的单词来生成不同的句子。这种方法允许生成 100,000 个具有固定语法结构的独特句子。言语接受阈值（SRT），即提供 50%言语可懂度的信噪比（SNR）和 S(50)，即在 SRT 点的可懂度函数的斜率，分别为-9.6 dB 和 17.1%/dB。请注意，在本研究中，dB 被视为 dB SNR，否则将给出参考。PSMT 还使用自适应 1-up/1-down 阶梯程序进行了评估，分别在有和没有实验者参与的情况下进行了研究。在这些研究中获得的 SRT 没有显示出显著差异。
