Abstract
A one-dimensional computer model of the peripheral ear was explored using pure-tone inputs. This model was adopted after frequency-domain modeling showed that the differences between one- and two-dimensional models were small. The inner ear representation was the classical mass-spring-damper transmission line. In the time-domain simulations, this classical model was modified to have adjacent elements of the cochlear partition model lightly coupled to each other via springs.
Simulation of the entire peripheral ear demonstrated that the parameters used in Neely’s (1981), Allen’s (1977) and our model were fairly well chosen. All three representations yielded cochlear input impedances that accurate approximated Lynch et al.’s (1982) results at higher frequencies, and they yielded sound pressure levels at the partition that approximated Nedzelnitsky’s (1980) measurements at low frequencies. In addition, very low values of cochlear partition damping resulted in highly peaked displacement curves that were approximately correct in amplitude (near 1 A at 0 dB SPL for 1 kHz).
The effect of moderate longitudinal stiffness coupling was to broaden significantly the width of the resonant peak in the lightly damped case, at the cost of only slightly reducing the peak’s magnitude. Proper values of this longitudinal coupling resulted in tuning-curve shapes and values of Q10 that were quite realistic.
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© 1986 Springer-Verlag Berlin Heidelberg
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Wickesberg, R.E., Geisler, C.D. (1986). Longitudinal Stiffness Coupling in a 1-Dimensional Model of the Peripheral Ear. In: Allen, J.B., Hall, J.L., Hubbard, A.E., Neely, S.T., Tubis, A. (eds) Peripheral Auditory Mechanisms. Lecture Notes in Biomathematics, vol 64. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-50038-1_15
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DOI: https://doi.org/10.1007/978-3-642-50038-1_15
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