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Neuromagnetic Responses to Infrequent Changes in Periodicity Pitch

  • Sing Teh Lu
  • Riitta Hari
  • Mikko Sams

Abstract

Periodic acoustic signals are perceived to have a pitch which does not depend on the spectral content of the sound. The existence of this kind of perception, usually called ‘periodicity pitch’, suggests that the temporal features of the sound, in addition to its spectral content, may form the basis for pitch detection (Langner, 1985; Warren and Bashford, 1988). Extraction of spectral information in the cochlea is explained by the ‘place principle’ (Pickles, 1988), and the tonotopic organization is retained also at the cortical level. There is no evidence of an analogous cortical place code for the temporal information involved in the periodicity pitch.

Keywords

Auditory Cortex Field Pattern Spectral Content Equivalent Current Dipole Pitch Detection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Harris, G. G., 1963, Periodicity perception by using gated noise, J. Acoust. Soc. Am., 35:1229.CrossRefGoogle Scholar
  2. Langner, G., 1985, Time coding and periodicity pitch, in: “Time Resolution in Auditory System”. A. Michelsen, ed., Springer Verlag, Berlin.Google Scholar
  3. Pickles, J., O., 1988, An Introduction to the Physiology of Hearing. Academic Press, New York.Google Scholar
  4. Symmes, D., 1966, Discrimination of intermittent noise by macaques following lesions of the temporal lobe. Exp. Neurol. 16: 201.PubMedCrossRefGoogle Scholar
  5. Warren, R. M., and Bashford, J. A., 1988, Spectral dominance or pitch averaging? J. Acoust. Soc. Am. 84: 2058.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Sing Teh Lu
    • 1
  • Riitta Hari
    • 1
  • Mikko Sams
    • 1
  1. 1.Low Temperature LaboratoryHelsinki University of TechnologyEspooFinland

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