Consonant identification variability shifts from token-level to listener-level as SNR falls

Evidence

Regarding the trends across SNR in Fig. 2 , it can be seen that the across-CV distance (black bars) was at ceiling for large SNRs and decreased with decreasing SNR, as listeners made more speech-token specific confusions. All other perceptual distance types showed low values for large SNRs and increased with decreasing SNR due to stimulus-specific confusions and listener uncertainty. The within-listener distance (“internal noise”) represented the baseline and strongly increased with decreasing SNR as the task became more challenging. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5601

Categorization

• XREF: Directly relevant to the reader’s stated interest in normal hearing cognition: the SNR dependence of internal noise baseline tracks task difficulty, paralleling signal-detection threshold shifts.