EUROSPEECH 2001 Scandinavia
Previous research has shown that the VOT and first formant transition are primary perceptual cues for the voicing distinction for syllable-initial plosives (SLP) in quiet environments. This study seeks to determine which cues are important for the perception of voicing for SLP in the presence of noise. Stimuli for the perceptual experiments consisted of naturally-spoken /CV/ syllables (six plosives in 3 vowel contexts) in varying levels of additive white Gaussian noise. In each experiment, plosives which share the same place of articulation (e.g. /p, b/) were presented to subjects in identification tasks. For each voiced/voiceless pair, a threshold SNR value was calculated. Threshold SNR values were then correlated with measurements of several acoustic parameters of the speech tokens. It was found that the VOT did not appear to influence the perception of voicing in noise as much as the first formant transition.
Bibliographic reference. Chen, Marcia / Alwan, Abeer (2001): "On the perception of voicing for plosives in noise", In EUROSPEECH-2001, 175-178.