The role of spectral cues in timbre discrimination by ferrets and humans.
The role of spectral cues in timbre discrimination by ferrets and humans.
复制标题
DOI：
10.1121/1.4916690
复制
发表时间：
2015-05
期刊：
影响因子：
--
通讯作者：
Bizley JK
中科院分区：
文献类型：
--
作者：
Town SM;Atilgan H;Wood KC;Bizley JK
音色区分相同的响度，音高和持续时间的声音;然而，对音色感知的神经机制知之甚少。这种理解需要动物模型，如雪貂，其中神经元和行为观察可以结合起来。目前的研究询问雪貂使用什么光谱线索来区分合成元音。雪貂被训练来区分元音不同的位置的第一（F1）和第二共振峰（F2），共振峰间的距离和频谱质心。在实验一中，雪貂响应探针试验包含新的元音，其中训练元音的频谱线索不匹配。拟合行为反应的回归模型确定，F2和光谱质心比F1或共振峰间距离更能预测雪貂的行为。实验二研究了对单一共振峰元音的反应，发现单个频谱峰不能解释多共振峰元音感知。实验三测量清音元音的反应，并表明，雪貂可以概括元音的身份在发声条件。实验四采用与实验一相同的设计，但与人类参与者。用F2和光谱质心预测了它们的响应。这些发现进一步支持雪貂作为研究音色感知神经过程的模型。
Timbre distinguishes sounds of equal loudness, pitch and duration; however little is known about the neural mechanisms underlying timbre perception. Such understanding requires animal models such as the ferret in which neuronal and behavioral observation can be combined. The current study asked what spectral cues ferrets use to discriminate between synthetic vowels. Ferrets were trained to discriminate vowels differing in the position of the first (F1) and second formants (F2), inter-formant distance and spectral centroid. In Experiment One, ferrets responded to probe trials containing novel vowels in which the spectral cues of trained vowels were mismatched. Regression models fitted to behavioral responses determined that F2 and spectral centroid were stronger predictors of ferrets’ behavior than either F1 or inter-formant distance. Experiment Two examined responses to single formant vowels and found that individual spectral peaks failed to account for multi-formant vowel perception. Experiment Three measured responses to unvoiced vowels and showed that ferrets could generalize vowel identity across voicing conditions. Experiment Four employed the same design as Experiment One but with human participants. Their responses were also predicted by F2 and spectral centroid. Together these findings further support the ferret as a model for studying the neural processes underlying timbre perception.
登录
查看更多内容
DOI：
10.1121/1.4768798
发表时间：
2013-01
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Bizley JK;Walker KM;King AJ;Schnupp JW
通讯作者：
Schnupp JW
影响因子：
2.5
作者：
KOJIMA, S;KIRITANI, S
通讯作者：
KIRITANI, S
影响因子：
1.7
作者：
Fitch, WT;Kelley, JP
通讯作者：
Kelley, JP
影响因子：
2.4
作者：
Ito, M;Tsuchida, J;Yano, M
通讯作者：
Yano, M
影响因子：
5.4
作者：
LIBERMAN, AM;COOPER, FS;STUDDERT.M
通讯作者：
STUDDERT.M