Variability in talkers' fundamental frequencies shapes context effects in speech perception.
Variability in talkers' fundamental frequencies shapes context effects in speech perception.
复制标题
说话者基频的变化会影响言语感知的情境效应。
DOI：
--
复制
发表时间：
2019
影响因子：
2.4
通讯作者：
Christian E. Stilp
中科院分区：
文献类型：
--
作者：
Ashley A. Assgari;Rachel M. Theodore;Christian E. Stilp
对任何给定声音的感知都受到周围声音的影响。当连续的声音在它们的频谱组成上不同时，这些差异可能被感知放大，导致频谱对比效应（SCE）。例如，听者更有可能感知到//（低F1）跟随F1频率较高的句子;听者也更有可能感知到//（高F1）跟随F1频率较低的句子。先前的研究表明，当句子上下文由不同的说话者说出时，元音分类的SCE会减弱[Assgari和Stilp。（2015年）。J. Acoust.美国社会138（5），3023-3032]，但这种减少的背景影响的轨迹没有具体说明。在这里，三个实验研究变量说话者声学SCE的分类的//和//的影响。结果表明，当上下文句子的平均基频（f0）在说话者之间变化很大时，SCE较小，而当平均f0更一致时，即使说话者性别保持不变。相反，SCE幅度不受平均F1变异性的影响。这些研究结果表明，谈话者的变异性衰减SCE由于减少的一致性f0作为一个上下文的影响。这些结果之间的连接和谈话者正常化。
The perception of any given sound is influenced by surrounding sounds. When successive sounds differ in their spectral compositions, these differences may be perceptually magnified, resulting in spectral contrast effects (SCEs). For example, listeners are more likely to perceive /ɪ/ (low F1) following sentences with higher F1 frequencies; listeners are also more likely to perceive /ɛ/ (high F1) following sentences with lower F1 frequencies. Previous research showed that SCEs for vowel categorization were attenuated when sentence contexts were spoken by different talkers [Assgari and Stilp. (2015). J. Acoust. Soc. Am. 138(5), 3023-3032], but the locus of this diminished contextual influence was not specified. Here, three experiments examined implications of variable talker acoustics for SCEs in the categorization of /ɪ/ and /ɛ/. The results showed that SCEs were smaller when the mean fundamental frequency (f0) of context sentences was highly variable across talkers compared to when mean f0 was more consistent, even when talker gender was held constant. In contrast, SCE magnitudes were not influenced by variability in mean F1. These findings suggest that talker variability attenuates SCEs due to diminished consistency of f0 as a contextual influence. Connections between these results and talker normalization are considered.