Modeling the combined effects of basilar membrane nonlinearity and roughness on stimulus frequency otoacoustic emission fine structure

2000 ◽  
Vol 108 (6) ◽  
pp. 2911-2932 ◽  
Author(s):  
Carrick L. Talmadge ◽  
Arnold Tubis ◽  
Glenis R. Long ◽  
Christopher Tong
Keyword(s):  
Fine Structure ◽  
Basilar Membrane ◽  
Stimulus Frequency ◽  
Otoacoustic Emission ◽  
Combined Effects

scholarly journals Efferent Modulation of Stimulus Frequency Otoacoustic Emission Fine Structure

2015 ◽  
Vol 9 ◽  
Author(s):  
Wei Zhao ◽  
James B. Dewey ◽  
Sriram Boothalingam ◽  
Sumitrajit Dhar
Keyword(s):  
Fine Structure ◽  
Stimulus Frequency ◽  
Otoacoustic Emission

scholarly journals Hydromechanical Structure of the Cochlea Supports the Backward Traveling Wave in the Cochlea In Vivo

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Fangyi Chen ◽  
Dingjun Zha ◽  
Xiaojie Yang ◽  
Allyn Hubbard ◽  
Alfred Nuttall
Keyword(s):  
Traveling Wave ◽  
Basilar Membrane ◽  
Wave Theory ◽  
Otoacoustic Emission ◽  
Traditional Theory ◽  
Vibration Source ◽  
Ear Canal ◽  
Local Vibration ◽  
Membrane Vibration

The discovery that an apparent forward-propagating otoacoustic emission (OAE) induced basilar membrane vibration has created a serious debate in the field of cochlear mechanics. The traditional theory predicts that OAE will propagate to the ear canal via a backward traveling wave on the basilar membrane, while the opponent theory proposed that the OAE will reach the ear canal via a compression wave. Although accepted by most people, the basic phenomenon of the backward traveling wave theory has not been experimentally demonstrated. In this study, for the first time, we showed the backward traveling wave by measuring the phase spectra of the basilar membrane vibration at multiple longitudinal locations of the basal turn of the cochlea. A local vibration source with a unique and precise location on the cochlear partition was created to avoid the ambiguity of the vibration source in most previous studies. We also measured the vibration pattern at different places of a mechanical cochlear model. A slow backward traveling wave pattern was demonstrated by the time-domain sequence of the measured data. In addition to the wave propagation study, a transmission line mathematical model was used to interpret why no tonotopicity was observed in the backward traveling wave.

Tinnitus: some thoughts about its origin

1984 ◽  
Vol 98 (S9) ◽  
pp. 31-37 ◽  
Author(s):  
J. J. Eggermont
Keyword(s):  
Hair Cells ◽  
High Frequency ◽  
Basilar Membrane ◽  
Stimulus Frequency ◽  
Low Frequency ◽  
Nerve Fibers ◽  
Ear Ossicles ◽  
Stimulus Transduction ◽  
Low Levels ◽  
Inner Ear Fluids

An auditory sensation follows generally as the result of the sequence stimulus, transduction, coding, transformation and sensation. This is then optionally followed by perception and a reaction. The stimulus is usually airborne sound causing movements of the tympanic membrane, the middle ear ossicles, the inner ear fluids and the basilar membrane. The movements of the basilar membrane are dependent on stimulus frequency: high frequency tones excite only the basal part of the cochlea, regardless of the stimulus intensity; low frequency tones at low levels only excite the so-called place specific region at the apical end but at high levels (above 60–70 dB SPL) cause appreciable movement of the entire basilar membrane. Basilar membrane tuning is as sharp as that of inner hair cells or auditory nerve fibers (Sellick et al., 1982) at least in the basal turn of animals that have a cochlea in physiologically impeccable condition.

Distortion-product otoacoustic emission fine structure as an indicator of combination-tone-mediated masking release

2015 ◽  
Vol 137 (4) ◽  
pp. 2408-2409
Author(s):  
James D. Lewis ◽  
Emily C. Clark ◽  
Judy G. Kopun ◽  
Walt Jesteadt ◽  
Stephen T. Neely ◽  
...  
Keyword(s):  
Fine Structure ◽  
Otoacoustic Emission ◽  
Distortion Product Otoacoustic Emission ◽  
Distortion Product ◽  
Masking Release
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