Jiang Jintao, Chen Marcia, Alwan Abeer
Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA.
J Acoust Soc Am. 2006 Feb;119(2):1092-105. doi: 10.1121/1.2149841.
Previous studies [Lisker, J. Acoust. Soc. Am. 57, 1547-1551 (1975); Summerfield and Haggard, J. Acoust. Soc. Am. 62, 435-448 (1977)] have shown that voice onset time (VOT) and the onset frequency of the first formant are important perceptual cues of voicing in syllable-initial plosives. Most prior work, however, has focused on speech perception in quiet environments. The present study seeks to determine which cues are important for the perception of voicing in syllable-initial plosives in the presence of noise. Perceptual experiments were conducted using stimuli consisting of naturally spoken consonant-vowel syllables by four talkers in various levels of additive white Gaussian noise. Plosives sharing the same place of articulation and vowel context (e.g., /pa,ba/) were presented to subjects in two alternate forced choice identification tasks, and a threshold signal-to-noise-ratio (SNR) value (corresponding to the 79% correct classification score) was estimated for each voiced/voiceless pair. The threshold SNR values were then correlated with several acoustic measurements of the speech tokens. Results indicate that the onset frequency of the first formant is critical in perceiving voicing in syllable-initial plosives in additive white Gaussian noise, while the VOT duration is not.
先前的研究[利斯克，《美国声学学会杂志》57，1547 - 1551（1975）；萨默菲尔德和哈格德，《美国声学学会杂志》62，435 - 448（1977）]表明，嗓音起始时间（VOT）和第一共振峰的起始频率是音节开头爆破音发声的重要感知线索。然而，大多数先前的研究都集中在安静环境中的语音感知上。本研究旨在确定在有噪声的情况下，哪些线索对于音节开头爆破音发声的感知是重要的。使用由四名说话者在不同水平的加性白高斯噪声中自然说出的辅音 - 元音音节组成的刺激进行了感知实验。将具有相同发音部位和元音语境的爆破音（例如，/pa，ba/）呈现给受试者进行两个交替强制选择识别任务，并为每个浊音/清音对估计一个阈值信噪比（SNR）值（对应于79%的正确分类分数）。然后将阈值SNR值与语音样本的几个声学测量值相关联。结果表明，在加性白高斯噪声中，第一共振峰的起始频率对于感知音节开头爆破音的发声至关重要，而VOT持续时间则不然。
