Henrich Nathalie, Sundin Gunilla, Ambroise Daniel, d'Alessandro Christophe, Castellengo Michèle, Doval Boris
LAM (UPMC, CNRS, Ministère de la culture), Paris, France.
J Voice. 2003 Dec;17(4):481-94. doi: 10.1067/s0892-1997(03)00005-5.
This study aims to explore the perceptual relevance of the variations of glottal flow parameters and to what extent a small variation can be detected. Just Noticeable Differences (JNDs) have been measured for three values of open quotient (0.4, 0.6, and 0.8) and two values of asymmetry coefficient (2/3 and 0.8), and the effect of changes of vowel, pitch, vibrato, and amplitude parameters has been tested. Two main groups of subjects have been analyzed: a group of 20 untrained subjects and a group of 10 trained subjects. The results show that the JND for open quotient is highly dependent on the target value: an increase of the JND is noticed when the open quotient target value is increased. The relative JND is constant: deltaOq/Oq = 14% for the untrained and 10% for the trained. In the same way, the JND for asymmetry coefficient is also slightly dependent on the target value--an increase of the asymmetry coefficient value leads to a decrease of the JND. The results show that there is no effect from the selected vowel or frequency (two values have been tested), but that the addition of a vibrato has a small effect on the JND of open quotient. The choice of an amplitude parameter also has a great effect on the JND of open quotient.
本研究旨在探索声门气流参数变化的感知相关性以及能检测到多小的变化程度。已针对三个开放商值（0.4、0.6和0.8）和两个不对称系数值（2/3和0.8）测量了恰可察觉差异（JND），并测试了元音、音高、颤音和振幅参数变化的影响。分析了两组主要受试者：一组20名未受过训练的受试者和一组10名受过训练的受试者。结果表明，开放商的JND高度依赖于目标值：当开放商目标值增加时，JND会增加。相对JND是恒定的：未受过训练的受试者为deltaOq/Oq = 14%，受过训练的受试者为10%。同样，不对称系数的JND也略微依赖于目标值——不对称系数值的增加会导致JND降低。结果表明，所选元音或频率（已测试两个值）没有影响，但添加颤音对开放商的JND有微小影响。振幅参数的选择对开放商的JND也有很大影响。
