The cortical dynamics underlying perception of speech sounds are still largely unknown. Here we used magnetoencephalography (MEG) and semi-synthetic speech generation (SSG) to study the cortical processing of three Finnish sustained vowels /a/, /o/ and /u/, in a passive (unattended) condition. The analysis of the auditory N1m responses revealed that the three vowels evoked equally strong activation at around 120ms. In the left hemisphere, differences in ECD locations for the vowels were observed while the ECD locations in the right hemisphere were the same. The left-hemispheric ECD distribution reflected the acoustic similarity and dissimilarity of the vowels, with the ECDs for vowels having similar acoustic structure in terms of their F1 and F2 values located close to each other in the auditory cortex.
展开▼
机译：语音声音的隐形动力学仍然很大程度上是未知数。在这里，我们使用了磁性脑图（MEG）和半合成语音生成（SSG）来研究三个芬兰持续元音/ a /，/ o / / u /，以无源（无人值守）条件的皮质处理。对听觉N1M反应的分析表明，三个元音在约120ms左右诱发同样强烈的激活。在左半球中，观察到元音的ECD位置的差异，而右半球的ECD位置是相同的。左半球形ECD分布反映了元音的声学相似性和不相似性，因为在听觉皮层中彼此靠近的F1和F2值，具有类似声学结构的元音的ECD。
展开▼
