Gengel R W, Kupperman G L
Ear Hear. 1980 May-Jun;1(3):156-60. doi: 10.1097/00003446-198005000-00008.
This study reports significant differences in listeners' performance when different speakers administer a test of speech intelligibility in noise in a manner that purportedly would yield equivalent test results. Six speakers, three female and three male, each recorded list 4 of the CID W-22 discrimination test. The recordings were mixed with speech noise at speech-to-noise ratios of +5, +1, and -3 dB. Three groups of 14 normal-hearing subjects were used. Each group heard the six speakers at one of the three speech-to-noise conditions. Equivalence between speakers was considered to have been achieved when means were not different and correlations were high. Results suggest that the assumption of interspeaker equivalence may not be valid when speech discrimination is measured in a background of noise.
本研究报告称，当不同的说话者以据称会产生等效测试结果的方式进行噪声中言语可懂度测试时，听众的表现存在显著差异。六名说话者，三名女性和三名男性，每人录制了CID W-22辨别测试的列表4。录音与语音噪声以+5、+1和-3 dB的信噪比混合。使用了三组每组14名听力正常的受试者。每组在三种信噪比条件之一听取这六名说话者的声音。当平均值无差异且相关性很高时，认为说话者之间达到了等效性。结果表明，在噪声背景下测量言语辨别力时，说话者间等效性的假设可能无效。
