Hawks J W
School of Speech Pathology & Audiology, Kent State University, Ohio 44242.
J Acoust Soc Am. 1994 Feb;95(2):1074-84. doi: 10.1121/1.410015.
Studies of thresholds for discrimination of formant frequency variation in synthetic vowel sounds have been predominantly limited to variations in a single formant. Here, differences limens (DLs) are presented for multiformant variations expressed in measures of delta F and as distances in the auditory-perceptual space (APS) proposed by J. D. Miller [J. Acoust. Soc. Am. 85, 2114-2134 (1989)]. DLs for four subjects were estimated along 102 synthetic vowel continua representing five patterns of formant variation [(1) single variation in F1; (2) single variation in F2; (3) parallel simultaneous variation in F1 and F2; (4) opposing simultaneous variation in F1 and F2; and parallel simultaneous variation in F1, F2, and F3] and 17 within- or between-category vowel sounds. Minimal uncertainty methodology was employed utilizing an adaptive up-down procedure with a cued, two-interval forced-choice (2IFC) task. The results of this experiment reflect smaller DLs for both single- and multiple-formant changes than have been found in the past and also suggest that discrimination of parallel multiformant variation is significantly better than opposing multiformant or single-formant variation.
对于合成元音中谐振峰频率变化的辨别阈值研究，主要局限于单一谐振峰的变化。本文给出了以ΔF度量表示的多谐振峰变化以及由J. D. 米勒提出的听觉感知空间（APS）中的距离[《美国声学学会杂志》85, 2114 - 2134 (1989)]的差别阈（DLs）。沿着102个合成元音连续体对四名受试者的DLs进行了估计，这些连续体代表了五种谐振峰变化模式[（1）F1的单一变化；（2）F2的单一变化；（3）F1和F2的平行同时变化；（4）F1和F2的相反同时变化；以及F1、F2和F3的平行同时变化]和17个类别内或类别间的元音。采用了最小不确定性方法，利用带有提示的自适应升降程序和双间隔强制选择（2IFC）任务。该实验结果表明，与过去的研究相比，单一和多谐振峰变化的DLs更小，并且还表明平行多谐振峰变化的辨别明显优于相反多谐振峰或单一谐振峰变化。
