Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Stapes"”.
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The study of a 3 3-dimentional structure of the congenital anomalous stape stapes compared with normal s stape stapes using Micro Micro-CT
… study aims to compare the congenital anomalous stapes with normal one and to understand the pathophysiology of congenital stapes anomaly. MATERIALS AND METHOD: The structures of 4 stapeses obtained from 4 persons with congenital ossicular anomaly and 1 stapes obtained from 1 person with …
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Using otoacoustic emissions to measure the transmission matrix of the middle-ear
… response at the tympanic membrane and stapes footplate is linear, one dimensional and time invariant. The technique allows for estimating the acoustic pressure and volume velocity at the tympanic membrane and the volume velocity of the stapes footplate, in both the forward and reverse …
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Evidence of inner-ear mechanisms in bone conduction in chinchillas
… work by investigating inner ear mechanisms with stapes fixation and ear canal occlusion. Results of stapes fixation show a decrease in scala vestibuli sound pressure Psv and little change in scala tympani sound pressure PST in bone conduction. Ear canal occlusion produces an increase in ear canal …
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The influence of water composition on the pitting behaviour of newly developed corrosion resistant steels
The mechanisation of the working stapes in South African gold mines has required the introduction of a fundamentally new technology, hydro-power, in which machines are powered hydraulically using mine water fed from above ground. Mine water is aggressive and has a variable acidity and pH, and …
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Superior semicircular canal dehiscence : auditory mechanisms
… as well as the effect of SCD on sound-induced stapes velocity and middle-ear input admittance.
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Messung der dynamischen Eigenschaften des Stapesringbandes
… im ovalen Fenster elastisch aufgehängten Stapes untersucht. Durch Anpassung der theoretischen Resonanzfunktion an die gemessenen Daten und Bestimmung der Stapesmasse durch Wiegen wurde die dynamische Steifigkeit des Ringbandes bestimmt. Die Werte streuen wie bei biologischen Systemen …
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Classification d'images en utilisant les forêts aléatoires et les histogrammes de gradients orientés: application à la reconnaissance faciale
… de reconnaissance de visages ndcessite deux Stapes: la premiere qui consiste h extraire les caracteristiques du visage et la seconde qui consiste &les classifier. Concemant I’extraction des caract^ristiques, nous utilisons dans notre recherche les histogrammes de gradients orientls. Ces …
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Middle ear pressure gain and cochlear input impedance in the chinchilla
… 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 measured with fiber optic pressure sensors like those …
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Middle ear development: Genetics and disease
… of three bony ossicles, the malleus, incus, and stapes that function to conduct sound from the external to the inner ear. Normal development of middle ear structures is integral for transduction of sound, defects resulting in conductive deafness. Mice are reliant on both embryonic and postnatal …
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Treatment of early middle ear cholesteatoma by atticosinoplasty
… among ossiculoplastic materials showed malleus stapes strut gave relatively good results. In the cases of near-normal hearing group, better maintenance of hearing acuity was shown when ossiculoplasty was not performed. Analysis according to type of cholesteatoma showed better results in attic …
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The evolutionary transition from reptiles to mammals: analyses of body size reduction and separation of middle ear elements from the jaw
… a single bone in the middle ear, the columella (stapes). Additionally, they conduct jaw abduction via a joint between the articular and the quadrate. Conversely, mammals all possess a single bone in the jaw, the dentary, and multiple bones in the middle ear. Mammalian jaw articulation takes place …
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A modeling framework and toolset for simulation and characterization of the cochlea within the auditory system
… intermediate variables such as displacement of stapes in response to impulse and tone excitations at the ear canal. The inputs and outputs of the cochlear partition are utilized in determining its resonances and tuning characteristics. Transfer functions of the cochlear system with impulse …