The role of peripheral resolvability in pitch-sequence processing.
The authors previously reported that same/different judgments on pitch sequences were more accurate for tones with resolved (low-rank) harmonics compared to unresolved (high-rank) harmonics, even when discriminability between tones was equated [Cousineau et al. (2009). J. Acoust. Soc. Am. 126, 3179-3187]. Here, peripheral resolvability, defined by the number of harmonics per cochlear filter, was contrasted with harmonic number. Tones were presented either diotically or dichotically. In the latter case, even and odd harmonics were presented to different ears, thus halving the number of harmonics per cochlear filter. Performance was better for dichotic than for diotic presentations. This indicates that peripheral resolvability is necessary and sufficient for efficient pitch-sequence processing.
Laboratoire Psychologie de la Perception, CNRS and Université Paris Descartes, 45 rue des Saints-Pères, F-75006 Paris, France. marion.cousineau@ens.fr
Marion
M
Cousineau
Laurent
L
Demany
Daniel
D
Pressnitzer
D000161:Acoustic Stimulation / Q000379:methods*; D000328:Adult; D003051:Cochlea / Q000502:physiology*; D004007:Dichotic Listening Tests; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D009622:Noise; D010897:Pitch Discrimination / Q000502:physiology*