Talker identity induces larger perceptual distance within phonemes than listener variability does

Evidence

Figure 2 shows the perceptual distances derived from the experimental data for all SNR conditions (see Sect. 2.4 ). On the left, the across-SNR average is shown. The largest perceptual distance of 91 % was found across CVs (black bar). Regarding the source-induced perceptual distances across stimuli of the same phonetic identity, the largest perceptual distance of 51 % was obtained across talkers (blue bar), followed by the within-talker factor (47 %, green bar). A temporal shift in the masking-noise waveform induced a perceptual distance of 39 % (red bar). Regarding the receiver-related effects, a substantial perceptual distance of 46 % across listeners was found for physically identical stimuli (light gray bar). In contrast, the relatively low perceptual distance of 30 % within listeners (test vs. retest, dark gray bar) indicated that the individual listeners were able to reproduce their responses fairly reliably. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5596