Middle ear function and cochlear input impedance in chinchilla
نویسندگان
چکیده
منابع مشابه
Middle Ear Pressure Gain and Cochlear Input Impedance in the Chinchilla
Measurements of middle ear conducted sound pressure in the cochlear vestibule PV have been performed in only a few individuals from a few mammalian species. Simultaneous measurements of sound-induced stapes velocity VS are even more rare. We report simultaneous measurements of VS and PV in chinchillas. The VS measurements were performed using single-beam laser-Doppler vibrometry; PV was measure...
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A quantitative theory of the middle-ear acoustics i developed and expressed interms of an electric analog. The analog network is based on the functional anatomy of the middle ear. The numerical values of its elements are derived from impedance measurements on normal and pathological ears and from anatomical data. It is shown that the input impedance of the analog agrees within the experimental ...
متن کاملA Theory of Cochlear Input Impedance and Middle Ear Parameter Estimation
A THEORY OF COCHLEAR INPUT IMPEDANCE AND MIDDLE EAR PARAMETER ESTIMATION by SUNIL PURIA Advisers: Professor Nenad M. Marinovic and Dr. Jont B. Allen In this thesis it is hypothesized that the geometry of the cat cochlea has evolved to maximize sound transmission from the eardrum to the cochlea. This hypothesis is shown to be tenable by modeling the cochlear input impedance and the middle-ear. I...
متن کاملNon-invasive estimation of middle-ear input impedance and efficiency.
A method to transform the impedance measured in the ear canal, ZEC, to the plane of the eardrum, ZED, is described. The portion of the canal between the probe and eardrum was modeled as a concatenated series of conical segments, allowing for spatial variations in its cross-sectional area. A model of the middle ear (ME) and cochlea terminated the ear-canal model, which permitted estimation of ME...
متن کاملOtotoxic Effects of Middle Ear Gentamicin Instillation in the Chinchilla
Gentamicin sulphate is used clinically to produce vestibular organ damage in patients with intractable vertigo. The drug is given locally by middle ear instillation. In humans, gentamicin appears to have a more toxic effect on the vestibular parts of the inner ear than on the cochlea. However, cochlear effects are not insignificant and to further explore the utility of monitoring vestibular and...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 2010
ISSN: 0001-4966
DOI: 10.1121/1.3279830