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- W2083070197 abstract "The cochlea is normally driven with “forward” stimulation, in which sound is introduced to the ear canal. Alternatively, the cochlea can be stimulated at the round window (RW) using an actuator. During RW “reverse” stimulation, the acoustic flow starting at the RW does not necessarily take the same path as during forward stimulation. To understand the differences between forward and reverse stimulation, we measured ear-canal pressure, stapes velocity, RW velocity, and intracochlear pressures in scala vestibuli (SV) and scala tympani (ST) of fresh human temporal bones. During forward stimulation, the cochlear drive (differential pressure across the partition) results from the large difference in magnitude between the pressures of SV and ST, which occurs due to the high compliance of the RW. During reverse stimulation, the relatively high impedance of the middle ear causes the pressures of SV and ST to have similar magnitudes, and the differential pressure results primarily from the difference in phase of the pressures. Furthermore, the sound path differs between forward and reverse stimulation, such that motion through a third window is more significant during reverse stimulation. Additionally, we determined that although stapes velocity is a good estimate of cochlear drive during forward stimulation, it is not a good measure during reverse stimulation. This article is part of a Special Issue entitled “MEMRO 2012”." @default.
- W2083070197 created "2016-06-24" @default.
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- W2083070197 date "2013-07-01" @default.
- W2083070197 modified "2023-09-27" @default.
- W2083070197 title "Comparison of forward (ear-canal) and reverse (round-window) sound stimulation of the cochlea" @default.
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- W2083070197 doi "https://doi.org/10.1016/j.heares.2012.11.005" @default.
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