In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 55, No. 2_Supplement ( 1974-02-01), p. 467-467
Abstract:
Fourier analyses have been conducted upon period histograms of responses of single cochlear nerve fibers to a pair of phase-locked, equal-amplitude tones whose frequencies f1 and f2 in relation to the characteristic frequency (CF) of the nerve fiber under study are given by the ratio CF:f1:f2 = i:j:k, where i, j, and k are positive integers satisfying i & lt;j & lt;k and i = 2j−k (typically i = 10, j = 11, and k = 12). For moderate-to-high stimulus levels, the relative level of the 2f1−f2 component with respect to the primary components changes only slightly, which is consistent with the previous report by Goldstein and Kiang [Proc. IEEE 56, 981 (1968)]. Confirming the prediction of a nonlinear basilar-membrane model which showed the above high-level property of the distortion component 2f1−f2 as well as a smooth transition into effectively linear response characteristics for sufficiently low input levels [Kim et al., J. Acoust. Soc. Am. 53, 324 (1973)] , we have observed that the 2f1−f2 component in cochlear nerve responses decreases with decreasing stimulus levels faster than the primary components for low stimulus, levels. The low-level characteristic of the 2f1−f3 component leads to a theoretically important conclusion that the 2f1−f2 combination tone in responses of a cochlear nerve fiber is not a result of an essential nonlinearity, and supports the linear characterization [Littlefield et al., J. Acoust. Soc. Am. 54 (1973) (in press)] of single cochlear nerve fiber responses for the most sensitive region of the response area corresponding to low stimulus levels.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1974
detail.hit.zdb_id:
1461063-2
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