Cochlear Nerve Fibre Temporal Discharge Patterns, Cochlear Frequency Selectivity and the Dominant Region for Pitch

  • E. F. Evans
Part of the Nato ASI Series book series (NSSA, volume 119)


These experiments continue investigations of the possible role played by the temporal discharge patterns of cochlear nerve fibres in determining the pitch assigned to complex stimuli in previous studies (Evans, 1978; 1983). The experiments concern a class of stimuli originally used by Seebeck, consisting of the pulse train having unequal alternate intervals, studied physiologically by Whitfield (1979, 1980) and Evans (1983a); and considered theoretically by Moore (1980). In the present case, a range of unequal intervals has been chosen from 4.5 and 5.5 ms, through 4.6 and 5.4, 4.8 and 5.2, to equal intervals at 5 ms, in order to establish a continuum of stimuli. At one end of this continuum, 4.5 and 5.5 ms, the pitch of the unfiltered stimulus is predominantly 100 Hz together with a less prominent ambiguous pitch of 180/220 Hz. At the other end, (4.8 and 5.2 ms), and of course, 5 ms, the pitch heard is predominantly 200 Hz, with a weaker 100 Hz. In addition, the stimulus paradigm of Schouten (1940) has been explored, where contrasting pitches are obtained from evenly spaced click trains having in one case pulses of the same polarity and in the other, alternate polarity.


Frequency Selectivity Finite Impulse Response Filter Cochlear Nerve Pitch Perception Dominant Region 
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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • E. F. Evans
    • 1
  1. 1.Dept. of Communication and NeuroscienceUniversity of KeeleStaffs.UK

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