Effects of speech transmission quality on sensory processing indicated by the cortical auditory evoked potential.

摘要: Objective. Degradations of transmitted speech have been shown to affect perceptual and cognitive processing in human listeners, as indicated by the P3 component event-related brain potential (ERP). However, research suggests that previously observed modulations might actually be traced back earlier neural time range P1-N1-P2 complex cortical auditory evoked (CAEP). This study investigates whether sensory processing, reflected complex, is already systematically altered quality degradations. Approach. Electrophysiological data from two studies were analyzed examine effects transmission (high-quality, noisy, bandpass-filtered) for spoken words on amplitude latency parameters individual P1, N1 P2 components. Main results. In resultant ERP waveforms, an initial manifested at stimulus onset, while a second N1-P2 occurred within ongoing stimulus. Bandpass-filtered versus high-quality word stimuli faster larger well reduced P2, hence exhibiting early stage information processing. Significance. The results corroborate existence systematic quality-related N1-P2, which may potentially carried over into demonstrated previous studies. future psychophysiological assessments, rigorous control procedures are needed ensure validity P3-based indication quality. An alternative CAEP-based assessment approach discussed, promises more efficient less constrained than established based P3.