Department of Neurology, University of Heidelberg, Heidelberg, Germany.
Adv Exp Med Biol. 2013;787:427-33. doi: 10.1007/978-1-4614-1590-9_47.
Human listeners are very sensitive to the asymmetry of time-reversed pairs of ramped and damped sounds. When the carrier is noise, the hiss -component of the perception is stronger in ramped sounds and the drumming component is stronger in damped sounds (Akeroyd and Patterson 1995). In the current study, a paired comparison technique was used to establish the relative "hissiness" of these noises, and the ratings were correlated with (a) components of the auditory evoked field (AEF) produced by these noises and (b) the magnitude of a hissiness feature derived from a model of the internal auditory images produced by these noises (Irino and Patterson 1998). An earlier AEF report indicated that the peak magnitude of the transient N100m response mirrors the perceived salience of the tonal perception (Rupp et al. 2005). The AEFs of 14 subjects were recorded in response to damped/ramped noises with half-lives between 1 and 64 ms and repetition rates between 12.5 and 100 ms. Spatio-temporal source analysis was used to fit the P50m, the P200m, and the sustained field (SF). These noise stimuli did not produce a reliable N100m. The hissiness feature from the auditory model was extracted from a time-averaged sequence of summary auditory images as in Patterson and Irino (1998). The results show that the perceptual measure of hissiness is highly correlated with the hissiness feature from the summary auditory image, and both are highly correlated with the magnitude of the transient P200m. There is a significant but weaker correlation with the SF and a nonsignificant correlation with the P50m. The results suggest that regularity in the carrier effects branching at an early stage of auditory processing with tonal and noisy sounds following separate spatio-temporal routes through the system.
人类听众对经过时间反转的斜坡和阻尼声音对非常敏感。当载波是噪声时，在斜坡声音中感知到的嘶嘶声成分更强，而在阻尼声音中鼓声成分更强（Akeroyd 和 Patterson 1995）。在当前的研究中，使用配对比较技术来确定这些噪声的相对“嘶嘶声”，并将评级与（a）这些噪声产生的听觉诱发场（AEF）的成分以及（b）从这些噪声产生的内部听觉图像模型中得出的嘶嘶声特征的大小相关联（Irino 和 Patterson 1998）。早期的 AEF 报告表明，瞬态 N100m 响应的峰值幅度反映了音调感知的感知显著性（Rupp 等人，2005 年）。记录了 14 名受试者对半衰期在 1 到 64 毫秒之间且重复率在 12.5 到 100 毫秒之间的阻尼/斜坡噪声的 AEF。使用时空源分析来拟合 P50m、P200m 和持续场（SF）。这些噪声刺激没有产生可靠的 N100m。听觉模型中的嘶嘶声特征是从类似于 Patterson 和 Irino（1998）的时间平均的总结听觉图像序列中提取的。结果表明，听觉感知的嘶嘶声与来自总结听觉图像的嘶嘶声特征高度相关，并且两者都与瞬态 P200m 的幅度高度相关。与 SF 存在显著但较弱的相关性，与 P50m 无相关性。结果表明，载波的规则性在听觉处理的早期阶段产生影响，带有音调的和噪声的声音沿着系统的单独时空路径通过。
