title: A dual mechanism for sound pitch perception: new evidence from brain electrophysiology.
abstract: The N1 component of the auditory brain evoked potential was used as a direct electrophysiological index, to study how the perception of pitch for complex periodic tones can be influenced by the phase of the harmonics that make up a sound, according to their ranks. Results showed that in the low pitch and/or high spectra region, N1 latency was modified by phase, whereas it was not in the high pitch and low spectra region. These data help bring evidence towards a dual mechanism for pitch perception, and demonstrate that these processes take place within 110 ms following stimulus onset. Results are compatible with a model based on the resolvability of components and on the bandwidth of auditory filters.
authors.affiliation: Neurosciences Cognitives et Imagerie Cerebrale, CNRS, UPR 640, Lena, Hôpital de la Salpétrière, Paris, France.
authors.forename: R
authors.initials: R
authors.lastname: Ragot
authors.forename: S
authors.initials: S
authors.lastname: Crottaz
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001303:Auditory Cortex / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010898:Pitch Perception / Q000502:physiology*