"The sensitivity of listeners to changes in the center frequency of vowel-like harmonic complexes as
a function of the center frequency of the complex cannot be explained by changes in the level of the
stimulus [Lyzenga and Horst, J. Acoust. Soc. Am. 98, 1943–1955 (1995)].
Rather, a complex pattern
of sensitivity is seen; for a spectrum with a triangular envelope, the greatest sensitivity occurs when
the center frequency falls between harmonics, whereas for a spectrum with a trapezoidal envelope,
greatest sensitivity occurs when the center frequency is aligned with a harmonic.
In this study, the
thresholds of a population model of auditory-nerve (AN) fibers were quantitatively compared to
these trends in psychophysical thresholds.
Single-fiber and population model responses were
evaluated in terms of both average discharge rate and the combination of rate and timing
information.
..."
Reference:
1 .
Tan Q, Carney LH (2005) Encoding of vowel-like sounds in the auditory nerve: model predictions of discrimination performance. J Acoust Soc Am 117:1210-22 [PubMed]
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