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Infuence of eardrum position on sound transmission
Krbálek, Jaroslav ; Dušek, Daniel (referee) ; Pellant, Karel (advisor)
The human eardrum is inclined at an angle of 50 ° t o the axis of external auditory canal. The main objective of this thesis was to determine the impact of the inclination on sound transmission characteristics of external ear canal. It was observed influence of the various features of the eardrum and of the malleus weight on calculated transmission characteristics. Simple finite element model (FEM model) was created in the ANSYS program. The acoustic subsystem of the outer ear tube, elastic eardrum and solid malleus were created. The external ear canal model was modeled as one sided open cylinder which was terminated diagonally bedded with eardrum. In addition to the impact of the eardrum inclination, the influence of the eardrum elasticity and the weight of malleus on the sound transmission characteristics of external ear canal was also monitored. The eventual presence of the coincidence effect was also studied.
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Influence of exostoses on hearing
Vališová, Šárka ; Švancara, Pavel (referee) ; Pellant, Karel (advisor)
Exostoses are periosteophyte inside the external auditory canal of the human ear. The main objective of this bachelor´s thesis is to determine the potencial impact of the shape modification of the external auditory canal due to occurence of exostoses on the mechanical sound transmission into the internal ear. The task was solved by FEM modelling performed in the ANSYS system. The simple finite element 2D model of the normal human ear has been taken from the diploma thesis B. Ouali: Development of 2D finite element model of human ear (BUT Brno, 2009), the model included the external ear canal, elastic eardrum, otitis cavity with the otitis ossicles and the cavity of the internal ear. The changes simulating exostoses in form of two opposite semicircles were performed. The different size and position of the symmetrical exostoses were studied. The influence of the exostoses on the sound transfer characteristics of the external ear canal was discused. It was processed the set of the audiograms (19 patients). The results of the modelling and the results of the audiology were compared, the preoperativ and the postoperativ stages were considered.
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Middle ear implants in clinical practice
Ondrášková, Lucie ; Janoušek, Oto (referee) ; Provazník, Ivo (advisor)
The paper is a brief overview of anatomy of the ear, hearing screening, diseases and disorders affecting the organ of hearing. Next, there are listed the first ideas implants and their materials and there are described middle ear implants used nowadays and the latest surgical procedures, relevant legislation and the reaction of the body on the implant. The practical part will consist of collecting clinical data comprise the number and types of operations, air and speech audiometry and subsequent statistical evaluation. At the conclusion will be discussed and reviewed the statistics.
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Pure tone audiometry
Maršálková, Leona ; Harabiš, Vratislav (referee) ; Chmelař, Milan (advisor)
The presented master’s thesis deals with the acoustics, specifically with the selected characteristics of the sound. It focuses on the anatomy of the auditory system and its function. The work describes the testing approaches for an evaluation of the auditory organ function and introduces modern methods used for the hearing tests, especially pure tone audiometry. A part of the thesis is dedicated to a concept of an audiometer for pure tone audiometry, which is presented in a detailed block diagram along with a description of its working components. Included chapters describe the partial circuits of the audiometer supplemented by the calcuations of its individual elements. The concluding part of the thesis deals with the evaluation of the device’s functionality.
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Somatism in Czech and German Phraseology
Máchová, Miroslava ; Janovec, Ladislav (advisor) ; Chejnová, Pavla (referee)
This Master's Thesis deals with the linguistic picture of the particular somatisms in Czech; their emergence is then compared with their equivalents in German. The theoretical part explains the basis of cognitive and cultural linguistics as linguistic picture of the world, categorization, anthropocentrism, metaphor, metonymy and linguistics in the context of cognitive science. The practical part summarizes the particular use of somatisms within the phraseological units of both languages. The analysis is based on the the profile theory and its image schema. This language background is accompanied by the non-linguistic discipline, psychosomatics, whose premises proved to be useful.
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Diseases of the eye and ear in dogs
Plocová, Markéta ; Fiala Šebková, Naděžda (advisor) ; Chmelíková, Eva (referee)
The work deals with the description of selected diseases of the eye and ear. In order to better understand the different diseases and disorders caused by them, there is first described the anatomy and physiology of the competent organs of vision and hearing, and the location of their centers in the brain. Some breeds, due to their anatomical and genetic foundation have predisposition to certain diseases or disorders. Selected diseases of vision and hearing are described in view of anatomical and physiological eventually. Part of the description of diseases is also an overview of the clinical signs and symptoms. Some of selected diseases are genetic and can be inherited from generation to generation. For these heritable diseases are mentioned the possible candidate genes and their localization. Next I explain the congenital diseases that may occur during prenatal or postnatal development. For each disease I present the table with breeds where the disease occurs.
Eye diseases mentioned in this work are largely genetic in origin, so there is described in detail the genetic basis of the disease with a potential name of the candidate gene, the mutation and its localization. I deal with the diseases of the Primary Lens Luxation (PLL), Canine Multifocal Retinopathy (CMR), Multifocal Retinal Dysplasia (MRD), Collie Eye Anomaly (CEA), Dry eye syndrome and curly hair (CKCSID), Glaucoma, Progressive Retinal Atrophy (PRA) . For these hereditary diseases, it is important for breeders to eliminate their occurrence with the consistent breeding work.
The most common diseases of the ear are called otities, ie. ear infections. These infections can lead to damage and finally to the complete loss of hearing. As a separate chapter I mention hearing disorder in Dalmatians, which is associated to the coat color. Next I deal with the neurological symptoms of ear disease, complication associated with total canal ablation and bulla osteotomy, pathological changes in congenital ear disorder MPS (Mucopolysaccharidosis), disorders of the inner ear and the vestibular system.
Finally, it should be noted that thanks to the latest findings of diseases, they are better described and it is achieved better recognition of diseases and their causes, but their prevention is dependent on the origin of the disease. For diseases obtained it is important for the dogs to ensure the welfare conditions, while for hereditary diseases it is necessary the negative selection in the respective breeding of the affected breed.
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Middle ear implants in clinical practice
Ondrášková, Lucie ; Janoušek, Oto (referee) ; Provazník, Ivo (advisor)
The paper is a brief overview of anatomy of the ear, hearing screening, diseases and disorders affecting the organ of hearing. Next, there are listed the first ideas implants and their materials and there are described middle ear implants used nowadays and the latest surgical procedures, relevant legislation and the reaction of the body on the implant. The practical part will consist of collecting clinical data comprise the number and types of operations, air and speech audiometry and subsequent statistical evaluation. At the conclusion will be discussed and reviewed the statistics.
|
|
|
Pure tone audiometry
Maršálková, Leona ; Harabiš, Vratislav (referee) ; Chmelař, Milan (advisor)
The presented master’s thesis deals with the acoustics, specifically with the selected characteristics of the sound. It focuses on the anatomy of the auditory system and its function. The work describes the testing approaches for an evaluation of the auditory organ function and introduces modern methods used for the hearing tests, especially pure tone audiometry. A part of the thesis is dedicated to a concept of an audiometer for pure tone audiometry, which is presented in a detailed block diagram along with a description of its working components. Included chapters describe the partial circuits of the audiometer supplemented by the calcuations of its individual elements. The concluding part of the thesis deals with the evaluation of the device’s functionality.
|
|
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Influence of exostoses on hearing
Vališová, Šárka ; Švancara, Pavel (referee) ; Pellant, Karel (advisor)
Exostoses are periosteophyte inside the external auditory canal of the human ear. The main objective of this bachelor´s thesis is to determine the potencial impact of the shape modification of the external auditory canal due to occurence of exostoses on the mechanical sound transmission into the internal ear. The task was solved by FEM modelling performed in the ANSYS system. The simple finite element 2D model of the normal human ear has been taken from the diploma thesis B. Ouali: Development of 2D finite element model of human ear (BUT Brno, 2009), the model included the external ear canal, elastic eardrum, otitis cavity with the otitis ossicles and the cavity of the internal ear. The changes simulating exostoses in form of two opposite semicircles were performed. The different size and position of the symmetrical exostoses were studied. The influence of the exostoses on the sound transfer characteristics of the external ear canal was discused. It was processed the set of the audiograms (19 patients). The results of the modelling and the results of the audiology were compared, the preoperativ and the postoperativ stages were considered.
|
|
|
Infuence of eardrum position on sound transmission
Krbálek, Jaroslav ; Dušek, Daniel (referee) ; Pellant, Karel (advisor)
The human eardrum is inclined at an angle of 50 ° t o the axis of external auditory canal. The main objective of this thesis was to determine the impact of the inclination on sound transmission characteristics of external ear canal. It was observed influence of the various features of the eardrum and of the malleus weight on calculated transmission characteristics. Simple finite element model (FEM model) was created in the ANSYS program. The acoustic subsystem of the outer ear tube, elastic eardrum and solid malleus were created. The external ear canal model was modeled as one sided open cylinder which was terminated diagonally bedded with eardrum. In addition to the impact of the eardrum inclination, the influence of the eardrum elasticity and the weight of malleus on the sound transmission characteristics of external ear canal was also monitored. The eventual presence of the coincidence effect was also studied.
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