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Добірка наукової літератури з теми "Middle ear electrical model"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Middle ear electrical model"

Najda, S. A. "Electrical Models of the Human Middle and Inner Ear." Electronics and Communications 17, no. 3 (September 24, 2012): 40–48. http://dx.doi.org/10.20535/2312-1807.2012.17.3.219591.

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SEONG, Ki-Woong, Eui-Sung JUNG, Hyung-Gyu LIM, Jang-Woo LEE, Min-Woo KIM, Sang-Hyo WOO, Jung-Hyun LEE, Il-Yong PARK, and Jin-Ho CHO. "Vibration Analysis of Human Middle Ear with Differential Floating Mass Transducer Using Electrical Model." IEICE Transactions on Information and Systems E92-D, no. 10 (2009): 2156–58. http://dx.doi.org/10.1587/transinf.e92.d.2156.

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Liu, Houguang, Hehe Wang, Zhushi Rao, Jianhua Yang, and Shanguo Yang. "Numerical Study and Optimization of a Novel Piezoelectric Transducer for a Round-Window Stimulating Type Middle-Ear Implant." Micromachines 10, no. 1 (January 9, 2019): 40. http://dx.doi.org/10.3390/mi10010040.

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Round window (RW) stimulation is a new application of middle ear implants for treating hearing loss, especially for those with middle ear disease. However, most reports on it are based on the use of the floating mass transducer (FMT), which was not originally designed for round window stimulation. The mismatch of the FMT’s diameter and the round window membrane’s diameter and the uncontrollable preload of the transducer, leads to a high variability in its clinical outcomes. Accordingly, a new piezoelectric transducer for the round-window-stimulating-type middle ear implant is proposed in this paper. The transducer consists of a piezoelectric stack, a flextensional amplifier, a coupling rod, a salver, a plate, a titanium housing and a supporting spring. Based on a constructed coupling finite element model of the human ear and the transducer, the influences of the transducer design parameters on its performance were analyzed. The optimal structure of the supporting spring, which determines the transducer’s resonance frequency, was ascertained. The results demonstrate that our designed transducer generates better output than the FMT, especially at low frequency. Besides this, the power consumption of the transducer was significantly decreased compared with a recently reported RW-stimulating piezoelectric transducer.

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Kim, Min-Woo, Min-Kyu Kim, Ki-Woong Seong, Hyung-Gyu Lim, Eui-Sung Jung, Ji-Hun Han, Il-Yong Park, and Jin-Ho Cho. "Vibration characteristic analysis of differential floating mass transducer using electrical model for fully-implantable middle ear hearing devices." Journal of Sensor Science and Technology 16, no. 3 (May 31, 2007): 165–73. http://dx.doi.org/10.5369/jsst.2007.16.3.165.

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Osses Vecchi, Alejandro, Léo Varnet, Laurel H. Carney, Torsten Dau, Ian C. Bruce, Sarah Verhulst, and Piotr Majdak. "A comparative study of eight human auditory models of monaural processing." Acta Acustica 6 (2022): 17. http://dx.doi.org/10.1051/aacus/2022008.

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A number of auditory models have been developed using diverging approaches, either physiological or perceptual, but they share comparable stages of signal processing, as they are inspired by the same constitutive parts of the auditory system. We compare eight monaural models that are openly accessible in the Auditory Modelling Toolbox. We discuss the considerations required to make the model outputs comparable to each other, as well as the results for the following model processing stages or their equivalents: Outer and middle ear, cochlear filter bank, inner hair cell, auditory nerve synapse, cochlear nucleus, and inferior colliculus. The discussion includes a list of recommendations for future applications of auditory models.

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Shin, Dong Ho. "Design Study of a Round Window Piezoelectric Transducer for Active Middle Ear Implants." Sensors 21, no. 3 (January 31, 2021): 946. http://dx.doi.org/10.3390/s21030946.

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This report describes the design of a new piezoelectric transducer for round window (RW)-driven middle ear implants. The transducer consists of a piezoelectric element, gold-coated copper bellows, silicone elastomer (polydimethylsiloxane, PDMS), metal cylinder (tungsten), and titanium housing. The piezoelectric element is fixed to the titanium housing and mechanical resonance is generated by the interaction of the bellows, PDMS, and tungsten cylinder. The dimensions of PDMS and the tungsten cylinder with output characteristics suitable for compensation of sensorineural hearing loss were derived by mechanical vibrational analysis (equivalent mechanical model and finite element analysis (FEA)). Based on the results of FEA, the RW piezoelectric transducer was implemented, and bench tests were performed under no-load conditions to confirm the output characteristics. The transducer generates an average displacement of 219.6 nm in the flat band (0.1–1 kHz); the resonance frequency is 2.3 kHz. To evaluate the output characteristics, the response was compared to that of an earlier transducer. When driven by the same voltage (6 Vp), the flat band displacement averaged 30 nm larger than that of the other transducer, and no anti-resonance was noted. Therefore, we expect that the new transducer can serve as an output device for hearing aids, and that it will improve speech recognition and treat high-frequency sensorineural hearing loss more effectively.

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Liu, Zhao, Yang, and Rao. "The Influence of Piezoelectric Transducer Stimulating Sites on the Performance of Implantable Middle Ear Hearing Devices: A Numerical Analysis." Micromachines 10, no. 11 (November 14, 2019): 782. http://dx.doi.org/10.3390/mi10110782.

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To overcome the inherent deficiencies of hearing aids, implantable middle ear hearing devices (IMEHDs) have emerged as a new treatment for hearing loss. However, clinical results show that the IMEHD performance varies with its transducer’s stimulating site. To numerically analyze the influence of the piezoelectric transducer’s stimulating sites on its hearing compensation performance, we constructed a human ear finite element model and confirmed its validity. Based on this finite element model, the displacement stimulation, which simulates the piezoelectric transducer’s stimulation, was applied to the umbo, the incus long process, the incus body, the stapes, and the round window membrane, respectively. Then, the stimulating site’s effect of the piezoelectric transducer was analyzed by comparing the corresponding displacements of the basilar membrane. Besides, the stimulating site’s sensitivity to the direction of excitation was also studied. The result of the finite element analysis shows that stimulating the incus body is least efficient for the piezoelectric transducer. Meanwhile, stimulating the round window membrane or the stapes generates a higher basilar membrane displacement than stimulating the eardrum or the incus long process. However, the performance of these two ideal sites’ stimulation is sensitive to the changes in the excitation’s direction. Thus, the round window membrane and the stapes is the ideal stimulating sites for the piezoelectric transducer regarding the driving efficiency. The direction of the excitation should be guaranteed for these ideal sites.

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SEONG, Ki-Woong, Eui-Sung JUNG, Hyung-Gyu LIM, Jang-Woo LEE, Min-Woo KIM, Sang-Hyo WOO, Jung-Hyun LEE, Il-Yong PARK, and Jin-Ho CHO. "Erratum: Vibration Analysis of Human Middle Ear with Differential Floating Mass Transducer Using Electrical Model [IEICE Transactions on Information and Systems E92.D (2009) , No. 10 pp.2156-2158]." IEICE Transactions on Information and Systems E93-D, no. 1 (2010): 206_e1. http://dx.doi.org/10.1587/transinf.e93.d.206_e1.

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Wisotzky, Eric L., Jean-Claude Rosenthal, Ulla Wege, Anna Hilsmann, Peter Eisert, and Florian C. Uecker. "Surgical Guidance for Removal of Cholesteatoma Using a Multispectral 3D-Endoscope." Sensors 20, no. 18 (September 17, 2020): 5334. http://dx.doi.org/10.3390/s20185334.

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We develop a stereo-multispectral endoscopic prototype in which a filter-wheel is used for surgical guidance to remove cholesteatoma tissue in the middle ear. Cholesteatoma is a destructive proliferating tissue. The only treatment for this disease is surgery. Removal is a very demanding task, even for experienced surgeons. It is very difficult to distinguish between bone and cholesteatoma. In addition, it can even reoccur if not all tissue particles of the cholesteatoma are removed, which leads to undesirable follow-up operations. Therefore, we propose an image-based method that combines multispectral tissue classification and 3D reconstruction to identify all parts of the removed tissue and determine their metric dimensions intraoperatively. The designed multispectral filter-wheel 3D-endoscope prototype can switch between narrow-band spectral and broad-band white illumination, which is technically evaluated in terms of optical system properties. Further, it is tested and evaluated on three patients. The wavelengths 400 nm and 420 nm are identified as most suitable for the differentiation task. The stereoscopic image acquisition allows accurate 3D surface reconstruction of the enhanced image information. The first results are promising, as the cholesteatoma can be easily highlighted, correctly identified, and visualized as a true-to-scale 3D model showing the patient-specific anatomy.

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Ravicz, Michael E., and John J. Rosowski. "Chinchilla middle ear transmission matrix model and middle-ear flexibility." Journal of the Acoustical Society of America 141, no. 5 (May 2017): 3274–90. http://dx.doi.org/10.1121/1.4982925.

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Дисертації з теми "Middle ear electrical model"

Гарасюк, Анастасія Олегівна. "Моделювання і знаходження парціальних частот зовнішнього та середнього вуха людини". Master's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/33867.

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Наша здатність чути залежить насамперед від звукових хвиль, які рухаються через зовнішнє та середнє вухо до внутрішнього вуха. Отже, характеристики зовнішнього та середнього вуха забезпечують передачу звуку до внутрішнього вуха. Тому вкрай важливо розуміти механізм роботи слухової системи людини. Дослідження людського слуху, як правило, засновані на експериментах в природних умовах або в пробірці на тимчасових кісткових зразках. Їхньою ціллю, по-перше, є отримання уявлення про функціональність всієї системи або середнього вуха та, по-друге, оцінка впливу захворювань і хірургічної реконструкції на здатності слуху. У роботі проведено аналіз існуючих методів моделювання середнього вуха людини та запропоновано розширену модель зовнішнього та середнього вуха людини з використанням методу електромеханічних аналогій.
Our ability to hear depends primarily on sound waves traveling through the outer and middle ear toward the inner ear. Hence, the characteristics of the outer and middle ear aect sound transmission to/from the inner ear. Therefore, it is extremely important to understand the mechanism of the human auditory system. Studies of human hearing are usually based on experiments in vivo or in vitro on temporary bone samples. Their purpose, firstly, is to get an idea of the functionality of the entire system or middle ear and, secondly, to assess the impact of disease and surgical reconstruction on hearing. The main possible approaches for theoretical obtaining of the external and middle ear frequency response based on the results of the average frequency response of a healthy person are analyzed, namely: a mechanical model with concentrated parameters, a finite element method and an electromechanical analogy method. As a result, an equivalent electrical circuit is proposed that takes into account both the outer ear and the middle ear, and allows you to reproduce more of the characteristic resonances of the frequency response of the average healthy person.

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Bornitz, Matthias, Thomas Zahnert, Hans-Jürgen Hardtke, and Karl-Bernd Hüttenbrink. "Identification of Parameters for the Middle Ear Model." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-135790.

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This paper presents a method of parameter identification for a finite-element model of the human middle ear. The parameter values are estimated using a characterization of the difference in natural frequencies and mode shapes of the tympanic membrane between the model and the specimens. Experimental results were obtained from temporal bone specimens under sound excitation (300–3,000 Hz). The first 3 modes of the tympanic membrane could be observed with a laser scanning vibrometer and were used to estimate the stiffness parameters for the orthotropic finite-element model of the eardrum. A further point of discussion is the parameter sensitivity and its implication for the identification process
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich

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Bornitz, Matthias, Thomas Zahnert, Hans-Jürgen Hardtke, and Karl-Bernd Hüttenbrink. "Identification of Parameters for the Middle Ear Model." Karger, 1999. https://tud.qucosa.de/id/qucosa%3A27677.

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This paper presents a method of parameter identification for a finite-element model of the human middle ear. The parameter values are estimated using a characterization of the difference in natural frequencies and mode shapes of the tympanic membrane between the model and the specimens. Experimental results were obtained from temporal bone specimens under sound excitation (300–3,000 Hz). The first 3 modes of the tympanic membrane could be observed with a laser scanning vibrometer and were used to estimate the stiffness parameters for the orthotropic finite-element model of the eardrum. A further point of discussion is the parameter sensitivity and its implication for the identification process.
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.

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O'Connor, Kevin N. (Kevin Neill) 1977. "Analysis of exotic cat vocalizations and middle-ear properties." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86822.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
Includes bibliographical references (p. 231-232).
by Kevin N. O'Connor.
M.Eng.

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Teoh, Su Wooi. "The roles of pars flaccida in middle ear acoustic transmission." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39751.

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Daniel, Sam J. "Finite-element model of the human eardrum and middle ear." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29429.

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Computer-generated models are increasingly being used in otolaryngology for teaching purposes, pre-operative planning and clinical simulations, especially when dealing with small complex areas such as the middle ear.
One technique used to analyse the mechanics of complex models is the finite-element method whereby the system of interest is divided into a large number of small simple elements. The mechanical properties and applied forces are represented by functions defined over each element, and the mechanical response of the whole system can then be computed.
A unique three-dimensional finite-element model of the human eardrum and middle ear was devised. This model takes advantage of phase-shift moire shape measurements to precisely define the shape of the eardrum. The middle-ear geometry is derived from histological serial sections and from high-resolution magnetic-resonance microscopy of the human ear.
The model allows an improved understanding of the mechanics of the human middle ear, can simulate various pathological conditions, and assist in the design of ossicular prostheses.

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Chhan, David. "Role of middle-ear inertial component of bone conduction in chinchilla." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82381.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 53-55).
Bone conduction describes the mechanisms that produce a hearing sensation when the skull bones are subjected to vibration. Multiple components and pathways have been suggested to contribute to total bone-conducted sound. They include outer-ear cartilaginous wall compression, middle-ear inertia, fluid inertia, cochlear capsule compression and soft-tissue conduction. Due to the complexity of the possible interactions within these components and pathways, the true stimulus to the inner ear is not fully understood nor has it been adequately quantified. In this thesis work, we examined the relationship between inner-ear sound pressures and its sensory response in addition to determining the relative significance between the outer, middle and inner ear mechanisms that are prominent in bone conduction hearing in chinchilla. Using both mechanical and physiological recording techniques, we measured cochlear responses in chinchilla before and after interruption of the middle-ear ossicular system in both air conduction (AC) and bone conduction (BC) stimulation. Our data suggest that differential intracochlear sound pressure is the driving source to the sensory response of the inner ear in AC and BC. Compared to those in AC, inner-ear sound pressure measurements in BC provide evidence of multiple mechanisms in BC process. After middle ear interruption, pressures in scala vestibuli Psv and scala tympani PST drop by as much as 40 dB in AC, but only decrease in Psv by 10 dB, with almost no change in PST in BC. The difference in the change of both Psv and PST in BC compared to AC suggest the main mechanisms that drive the inner ear response in BC are not derived from the outer ear or middle ear but the inner ear.
by David Chhan.
S.M.

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Slama, Michaël C. C. (Michaël Charles Chalom). "Middle ear pressure gain and cochlear input impedance in the chinchilla." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44909.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 35-37).
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 measured with fiber optic pressure sensors like those described by Olson [JASA 1998; 103: 3445-63]. Accurate in-vivo measurements of PV are limited by anatomical access to the vestibule, the relative sizes of the sensor and vestibule, and damage to the cochlea when inserting the measurement device. The small size (170 [mu]m diameter) of the fiber-optic pressure sensors helps overcome these three constraints. PV and VS were measured in six animals, and the middle ear pressure gain (ratio of PV to the sound pressure in the ear canal) and the cochlear input impedance (ratio of PV to the product of VS and area of the footplate) computed. Our measurements of middle ear pressure gain are similar to published data in the chinchilla at stimulus frequencies of 500 Hz to 3 kHz, but are different at other frequencies. Our measurements of cochlear input impedance differ somewhat from previous estimates in the chinchilla and show a resistive input impedance up to at least 10 kHz. To our knowledge, these are the first direct measurements of this impedance in the chinchilla. The acoustic power entering the cochlea was computed based on our measurements of input impedance. This quantity was a good predictor for the audiogram at frequencies below 1 kHz.
by Michaël C.C. Slama.
S.M.

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Van, Wijhe Rene G. "A finite element model of the middle ear of the moustached bat /." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31074.

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Recently smooth-muscle tissue has been observed in the annular ligament of the moustached bat, Pteronotus parnellii. In order to lead to improved understanding of the function of this highly developed smooth-muscle system surrounding the tympanic membrane, a finite-element model was developed.
The complex geometry of the middle ear was defined using both magnetic-resonance microscopy and histological data. Contributions were made to the locally written software which was used for image segmentation and finite-element mesh generation.
The action of the smooth-muscle fibres is modelled by applying a radial load to the model of the tympanic membrane. The radial load is represented by placing load vectors tangential to the model of the tympanic membrane.
Simulations were carried out in order to investigate convergence, sensitivity to tympanic-membrane shape, and to evaluate the effects of pressure and radial loads.

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Huang, Gregory T. (Gregory Tsan-Kao). "Measurement of middle-ear acoustic function in intact ears : application to size variations in the cat family." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/79972.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
Includes bibliographical references (p. 189-196).
by Gregory T. Huang.
Ph.D.

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Книги з теми "Middle ear electrical model"

Wave transmission in the middle cerebral artery: An electrical transmission line model approach. Ottawa: National Library of Canada, 1993.

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Частини книг з теми "Middle ear electrical model"

Watanabe, Kyosuke, Makoto Oka, and Hirohiko Mori. "Feedback Control of Middle Finger MP Joint Using Functional Electrical Stimulation Based on the Electrical Stimulus Intensity-Joint Torque Relation Model." In Human Interface and the Management of Information. Designing Information, 417–34. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50020-7_30.

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Qin, Wei, Tiansong Gu, and Hongliang Li. "Study on Inter-Turn Short Circuit Test for Distribution Reactor." In Proceedings of CECNet 2021. IOS Press, 2021. http://dx.doi.org/10.3233/faia210470.

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Inter-turn short circuit is a common fault in reactor. In view of the current situation of insufficient condition based maintenance of reactor, an on-line monitoring method suitable for Inter-turn short circuit fault of distribution reactor was proposed in this paper. Firstly, the equivalent circuit model of reactor was built, and the calculation method of electrical parameters of reactor was obtained; Then, a set of on-line monitoring system for reactor short-circuit fault was built. Finally, the short-circuit test of reactor under different fault location and fault degree was carried out. The results show that the equivalent reactance and resistance change rate of inter-turn short circuit of reactor have the symmetry of short circuit position, the absolute value of change rate in the middle is the largest, and the absolute value of change rate at both ends is the smallest. With the deepening of short-circuit fault, the equivalent reactance decreases and the decreasing range increases. The equivalent resistance shows an increasing trend, and the increasing range increases. This research technology can realize the effective monitoring of inter-turn short circuit fault of distribution reactor.

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Koch, Christof. "Linear Cable Theory." In Biophysics of Computation. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195104912.003.0008.

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In the previous chapter, we briefly met some of the key actors of this book. In particular, we introduced the RC model of a patch of neuronal membrane and showed an instance where such a “trivial” model accounts reasonably well for the input-output properties of a neuron, as measured at its cell body. However, almost none of the excitatory synapses are made onto the cell body, contacting instead the very extensive dendritic arbor. As we will discuss in detail in Chap. 3, dendritic trees can be quite large, containing up to 98% of the entire neuronal surface area. We therefore need to understand the behavior of these extended systems having a cablelike structure. The basic equation governing the dynamics of the membrane potential in thin and elongated neuronal processes, such as axons or dendrites, is the cable equation. It originated in the middle of the last century in the context of calculations carried out by Lord Kelvin, who described the spread of potential along the submarine telegraph cable linking Great Britain and America. Around the turn of the century, Herman and others formulated the concept of Kemleitermodel, or core conductor model, to understand the flow of current in nerve axons. Such a core conductor can be visualized as a thin membrane or sheath surrounding a cylindrical and electrically conducting core of constant cross section placed in a solution of electrolytes. The study of the partial differential equations describing the evolution of the electrical potential in these structures gave rise to a body of theoretical knowledge termed cable theory. In the 1930s and 1940s concepts from cable theory were being applied to axonal fibers, in particular to the giant axon of the squid (Hodgkin and Rushton, 1946; Davis and Lorente de No, 1947). The application of cable theory to passive, spatially extended dendrites started in the late 1950s and blossomed in the 1960s and 1970s, primarily due to the work of Rail (1989). In an appropriate gesture acknowledging his role in the genesis of quantitative modeling of single neurons, Segev, Rinzel, and Shepherd (1995) edited an annotated collection of his papers, to which we refer the interested reader. It also contains personal recollections from many of Rail's colleagues as well as historical accounts of the early history of this field.

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Anderson, Greg M., and David A. Crerar. "Thermodynamic Terms." In Thermodynamics in Geochemistry. Oxford University Press, 1993. http://dx.doi.org/10.1093/oso/9780195064643.003.0007.

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Thermodynamics is the science that deals with energy differences and transfers between systems, and with systematizing and predicting what transfers will take place. Such fundamental topics naturally find application in all branches of science, and have been of interest since the earliest beginnings of science. In general, since we are dealing with energy transfers between systems, most of what follows has to do with what the entities (equilibrium states) are from which and to which energy is being transferred, and the boundaries or walls through which or by which the transfer is effected. It is in these considerations that we first see the differences between natural systems (reality) and our models of these systems. System refers to any part of the universe we care to choose, whether the contents of a crucible, a cubic centimeter in the middle of a cooling magma, or the solar system. Depending on the nature of the discussion, it must be more or less clearly defined and separated (in fact or in thought) from the rest of the universe, which then becomes known as the system's surroundings. At the outset, we will effect an enormous simplification by considering only systems that are unaffected by electrical, magnetic, or gravitational fields, and in which particles are sufficiently large that surface effects can be neglected. Each of these topics can be incorporated into the basic thermodynamic network to be developed, but it is a nuisance to carry them all along from the beginning, and a great deal can be done without considering them at all. More exactly, a great deal can be done if we choose to consider systems where these fields and surfaces play a minor role. Clearly we would not get very far if we tried to understand the solar system without considering gravitational fields. Chemical and geochemical problems however commonly do not need to have these factors included in order to be understood. In science, when a problem or a phenomenon such as the solar system or the boiling of water is said to be understood, what is usually meant is that we have a model of the phenomenon which is satisfactory at some level, and about which virtually all scientists agree.

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Тези доповідей конференцій з теми "Middle ear electrical model"

Prendergast, Patrick J., Henry J. Rice, and Alexander W. Blayney. "A Finite Element Analysis of a Healthy Middle-Ear and a Middle-Ear Reconstructed With Prostheses." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0469.

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Abstract The human car is a complex biomechanical arrangement of bones and soft-tissues. To sense a sound, the pressure wave enters the ear canal (a curved tube) and is transformed as it travels towards the tympanic membrane (or ear drum). The tympanic membrane vibrates causing motion of the three bones of the middle-ear: the malleus, incus, and stapes (commonly called the hammer, anvil, and stirrup). The stapes motion stimulates the perilymph fluid of the inner-ear leading to an electrical pulse to the brain allowing us to perceive sounds. The there bones (called the ossicles) are suspended from the surrounding bone by various ligaments. Replacement of the ossicles with a prosthesis is a common surgical procedure, though it is not entirely satisfactory because the prosthesis can loosen or even extrude out from the middle-ear. In this study, we have developed an FE model of the healthy middle-ear and compared its vibro-acoustic response with the middle-ear reconstructed with two types of prosthesis — a partial ossicular replacement prosthesis (PORP) and a total ossicular replacement prosthesis (TORP).

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Zennaro, Dumon, Erre, Guillaume, and Aran. "Piezo-electric Middle Ear Implant Hearing Aid Experimental Model In Guinea-pig." In Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.589426.

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Zennaro, O., Th Dumon, J.-P. Erre, A. Guillaume, and J.-M. Aran. "Piezo-electric middle ear implant hearing aid experimental model in guinea-pig." In 1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.5761808.

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Ganesan, Adarsh Venkataraman, Varun Das Ramanujam Ramdoss, Deepan Kishore Kumar, and S. Swaminathan. "Novel Low Cost Powerless MEMS Based Ossicular System." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66341.

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In this paper, the design of MEMS based implantable device is proposed which does not require electrical power for the device functioning. The device is designed to mimic the human ossicular system and is aimed at restoring hearing by implanting it in patients with a damaged or surgically removed ossicular chain. The model involves multiple micro-beams considering the low cost and easy fabrication processes needed to realize the device. The solid mechanical and acoustic analyses for the MEMS based ossicular system are performed in COMSOL Multiphysics. Here, the device specifications are evaluated for the hearing frequency range 20Hz–20000Hz. The device delivers the maximum pressure gain of 10 dB is obtained at 5500 Hz. Further, the total displacement of 14*10−6 mm is obtained at the oval window for sound pressure level of 90 dB, using this device. The maximum weight of the whole system is approximately 33.7 mg and is in relevance with the human ossicular system. The failure analysis is also done to assess the device’s strength at extreme sound pressure of 200 Pa i.e., when nearby jet airplane taking off. The results shown here demonstrate the potential of the MEMS actuators for application to middle-ear audio-prosthesis systems without power supply requirements.

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Riad, Manal, Jamila Bakkoury, and Omar Bouattane. "Middle ear frequency response analysis for tinnitus identification." In 2017 International Conference on Electrical and Information Technologies (ICEIT). IEEE, 2017. http://dx.doi.org/10.1109/eitech.2017.8255228.

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Molnárka, G., E. M. Miletics, M. Fücsek, Theodore E. Simos, George Maroulis, George Psihoyios, and Ch Tsitouras. "A Mathematical Model for the Middle Ear Ventilation." In SELECTED PAPERS FROM ICNAAM-2007 AND ICCMSE-2007: Special Presentations at the International Conference on Numerical Analysis and Applied Mathematics 2007 (ICNAAM-2007), held in Corfu, Greece, 16–20 September 2007 and of the International Conference on Computational Methods in Sciences and Engineering 2007 (ICCMSE-2007), held in Corfu, Greece, 25–30 September 2007. AIP, 2008. http://dx.doi.org/10.1063/1.2997288.

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Withnell, Robert H., and Taylor N. Fields. "Zwislocki’s model of the middle ear re-visited." In MECHANICS OF HEARING: PROTEIN TO PERCEPTION: Proceedings of the 12th International Workshop on the Mechanics of Hearing. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4939367.

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Krzysztof, Kozik, Klein Wojciech, and Rusinek Rafal. "FEM model of middle ear prosthesis with pseudo-elastic effect." In COMPUTER METHODS IN MECHANICS (CMM2017): Proceedings of the 22nd International Conference on Computer Methods in Mechanics. Author(s), 2018. http://dx.doi.org/10.1063/1.5019129.

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Volandri, Gaia, Francesca Di Puccio, and Paola Forte. "A Sensitivity Study on a Hybrid FE/MB Human Middle Ear Model." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82326.

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The human middle ear includes the tympanic membrane and the ossicular chain. The finite element method is capable of representing the complex geometry and the material orthotropy of the tympanic membrane. On the contrary, the ossicles can be considered as rigid bodies and a multi-body approach can be adopted. In the present study a multi-body model of the ossicular chain and other structures (joints, ligaments and muscle tendons) of the middle ear was developed and combined with a finite element model of the tympanic membrane through a feedback control strategy. An optimization procedure was used to calibrate unspecified or uncertain parameters with the aim of reproducing ascertained experimental literature data. The sensitivity of the calibrated models to both tympanic membrane and ossicular chain parameters was investigated. Material, geometrical and inertial parameters were considered, in particular those whose values were most widespread in the literature.

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Garland, Philip. "A lumped parameter mechanical model of tensor tympani muscle contraction of the middle ear." In 160th Meeting Acoustical Society of America. Acoustical Society of America, 2011. http://dx.doi.org/10.1121/1.3592354.

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