|
|
Autonomous tool for measuring audiogram and frequency masking
Pachel, Jakub ; Sigmund, Milan (referee) ; Malucha, Jan (advisor)
The first half of the bachelor's thesis is focused on the theory of sound, it deals with the description of human hearing, some of hearing impairments and their impact on the hearing threshold, a description of simultaneous masking, and the introduction of hearing test methods. The second half introduces an audiometer's design and block diagram for pure-tone audiometry, which was programmed in the MATLAB development platform. Furthermore, the thesis presents the measurement results of the audiometer for five subjects. Finally, it describes how the program was supplemented with a graphical user interface with the possibility of adding masking tones and noises into the measurement process.
|
|
|
Audiogam measurement with LabView
Placzek, Roman ; Chmelař, Milan (referee) ; Kolář, Radim (advisor)
The project deals with hearing disorders and examination of hearing and mainly with construct audiometer with the help of sound card and computer program LabView. Thesis describes requirements for audiometers and its realization in LabView with detailed description of all controls and blocks. Headphone for audiometer is also described here, including measurement of its characteristics and calibration. As a part of this project, the manual for calibration and manual for examination of hearing in the program Audiometr is included.
|
|
|
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.
|
|
|
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.
|
|
|
Influence of exostoses on ear sound transfer function
Vališová, Šárka ; Švancara, Pavel (referee) ; Pellant, Karel (advisor)
Exostoses are surface periosteophyte inside the external auditory canal of the human ear. The main objective of the diploma thesis is to determine the potencial impact of the narrowing of external auditory canal by exostoses on the mechanical sound transmission into the internal ear. The task was solved by FEM modelling in the ANSYS system. The simple finite element 2D model of the normal human ear was used and it has been taken from the diploma thesis B Ouali: Development of 2D finite element model of human ear (BUT Brno, 2009). At the model, including the external ear canal, elastic eardrum, otitis cavity with otitis ossicles and the cavity of the internal ear with internal ear partition, the alterations simulating different size of narrowing a and different positionig of exostoses were done. The influence of the exostoses on the sound transfer characteristics for air sound transmission and for bone sound transmission was discused. The results were analysed and compared with audiology.
|
|
|
Acoustic generator for evoked potentials stimulation
Škutková, Helena ; Rampl, Ivan (referee) ; Chmelař, Milan (advisor)
Evoked potentials are electric brain response to external stimulus. They are important diagnostic no visual method in neurology. For their excitation use of different of kinds stimulation, most often: visual, auditory, somatosenzory, olfactory and gustatory. Evoked potentials are objective method for measurement sense perception. This master’s thesis is specialized to auditory evoked potentials and design acoustic generator for their stimulation. Auditory evoked potentials are primary used for objective audiometry, but they have another usage. In the first place, application is specialized on health sector. The aim of this master’s thesis is compact specified medical requirements with available technical resources.
|
|
|
Pure tone audiometer
Blahák, Petr ; Rampl, Ivan (referee) ; Chmelař, Milan (advisor)
Human hearing is to collect information from the outside world and is one of the basic human senses. Part of this thesis is devoted to acoustics, properties of the human ear in terms of perception of sounds and methods, which human ears are investigating. Audiometer is an instrument which is most often used in healthcare. The main content of this thesis is to design pure tone audiometer, which is important for the subjective tests of human hearing non-invasive method.
|
|
|
Computer Audiometry Realization
Solnický, Jan ; Janoušek, Oto (referee) ; Čmiel, Vratislav (advisor)
This project describes the implementation of computer audiometry for subjective hearing tests. The paper describes the implementation of the audiometer in C + + Borland Builder. Designed audiometer consists of a standard PC with operating system Windows, a sound card and headphones. The work also includes analysis of the problems of hearing loss and its examinations, that were used in the implementation of audiometry.
|
|
|
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.
|
|
|
Audiometry
Stanický, Ondřej ; Chmelař, Milan (referee) ; Hrozek, Jan (advisor)
The first part of the thesis focuses on theory and deals with the basic physical terms as far as acoustics is concerned. It also deals with a description of auditory system, as well as graphical results of audiometrical methods. The second part to the thesis deals with a scheme of audiometer for hearing tests. It also deals with the description of the programme as well as the transfer of the decibel scale to electric voltage and its correction. The last chapter contains the data collected during the hearing tests.
|
guest ::
