| Autor: |
LePage, Eric L., Johnstone, Brian M. |
| Zdroj: |
Journal of the Acoustical Society of America; 1980, Vol. 67 Issue S1, pS45-S45, 1p |
| Abstrakt: |
Since reporting a highly vulnerable nonlinear mechanical impulse response of the guinea pig basilar membrane [E. L. LePage and B. M. Johnstone, Hear. Res. (to be published)], we now present more comprehensive data showing: (1) The relationship between the degree of nonlinearity as functions of frequency and neural threshold determined from the N 1 response to tone pips; (2) A sharp intensity-dependent notch part way down the high-frequency slope accompanied by a rapid phase lag of 2 π radians; (3) The notch appears as the focus of the nonlinear region and often appears to separate regions of compression and expansion; (4) The rapid phase shift at the notch frequency appears to act as a breakpoint between two approximately linear phase segments. On the high-frequency side the phase may continue to lag for several cycles at up to -26 cycles/octave and is difficult to resolve; (5) The notch region may persist as nonlinear even after the nonlinear behavior has disappeared at the cutoff frequency; (6) The frequency of the notch often decreases with stimulus intensity. The discussion will refer to the way in which several factors appear to contribute to the observed basilar membrane response and their possible relevance to the second filter, and also to parallels in other cochlear data. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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