Pitch perception beyond the traditional existence region of pitch

• Published in: Proceedings of the National Academy of Sciences - PNAS Vol. 108; no. 18; pp. 7629 - 7634
• Main Authors: Oxenham, Andrew J, Micheyl, Christophe, Keebler, Michael V, Loper, Adam, Santurette, Sébastien
• Format: Journal Article
• Language: English
• Published: United States National Academy of Sciences 03.05.2011; National Acad Sciences
• Series: From the Cover
• Subjects: Acoustic Stimulation; Acoustics; Audio frequencies; Auditory nerve; Auditory perception; Biological Sciences; Cochlear Nerve - physiology; Ears & hearing; Frequencies; High frequencies; Human subjects; Humans; Melody; Music; Musical perception; Musical pitch; nerve tissue; Perception; Pitch perception; Pitch Perception - physiology; sensation; Sensory perception; Sound pitch; Tonal harmony
• ISSN: 0027-8424; 1091-6490; 1091-6490
• DOI: 10.1073/pnas.1015291108

Humans' ability to recognize musical melodies is generally limited to pure-tone frequencies below 4 or 5 kHz. This limit coincides with the highest notes on modern musical instruments and is widely believed to reflect the upper limit of precise stimulus-driven spike timing in the auditory nerve. We tested the upper limits of pitch and melody perception in humans using pure and harmonic complex tones, such as those produced by the human voice and musical instruments, in melody recognition and pitch-matching tasks. We found that robust pitch perception can be elicited by harmonic complex tones with fundamental frequencies below 2 kHz, even when all of the individual harmonics are above 6 kHz--well above the currently accepted existence region of pitch and above the currently accepted limits of neural phase locking. The results suggest that the perception of musical pitch at high frequencies is not constrained by temporal phase locking in the auditory nerve but may instead stem from higher-level constraints shaped by prior exposure to harmonic sounds.