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Development of finite element model of human vocal tract and space around the head based on data from computer tomography
Švarc, Martin ; Pellant, Karel (referee) ; Švancara, Pavel (advisor)
This bachelor´s thesis deals with creating a computational model for acoustic wave propagation in vocal tract and the area near the head. The main objective of this work is to map the three-dimensional model of the human head as an additional acoustic environment for more accurate measurement of the human voice on the basis of data from computed tomography, the study of function of the vocal cords, biomechanics of the human voice and an overview of medical imaging techniques suitable for the display of biomechanical models. The grid for finite element method (FEM) will be created from solid geometry of the vocal tract (from the vocal cords to the lips) and the acoustic space near the human head. The grid will be created in order to obtain new knowledge about the different locations of a human head with microphone.
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Computational modelling of human voice propagation through the vocal tract and in space around the head
Švarc, Martin ; Pellant, Karel (referee) ; Švancara, Pavel (advisor)
The following master thesis deals with creating a computational model for acoustic wave distribution by the human vocal tract and then the space around a human head. Detailed mapping of the sound field around the human head is important for more accurate measurement of the human voice. Part of this work is the creation of three-dimensional finite element model of the human head and the vocal tract during phonation of the vowel /:a/ based on the data from the computational tomography. Further the literature search of the function of the vocal tract, biomechanics of the making of the human voice, an overview of the computational models so far published in the literature and in literature reported measurements of the distribution of the human voice by the vocal tract and then in the space around the head . The following is the actual numerical solution of the acoustic waves distribution from the vocal cords through the vocal tract and then the space around the human head when thinking of acoustic absorption on the walls of the vocal tract and on the skin of the head for different types of waking of the model. The results are compared with previously published measurements of the distribution of the human voice and mainly the distortion of the frequency spectra at each specific node in the space around the head and in its vicinity of where the sensor microphones are typically placed are analyzed. Results of the computational modeling will eventually be used for frequency correction for various positions of the microphones scanning the voice distribution in its diagnosis, speech or singing.
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Comparison of online marketing communication of SPD and TOP 09 on Facebook in terms of persuasive means
Švarc, Martin ; Klabíková Rábová, Tereza (advisor) ; Shavit, Anna (referee)
This thesis deals with persuasive means of the online marketing communication of Czech political parties TOP 09 and Freedom and Direct Democracy - Tomio Okamura (SPD) on Facebook. The core of this study is the analysis of selected Facebook posts of the two political subjects and their subsequent comparison. The objective of the research is to find out what persuasive means these political parties use and whether their communications have something in common in terms of persuasive means or not. In order to meet the set objective, a qualitative method with a combination of pragmalinguistic and content analysis elements was chosen to achieve the most accurate analysis. Therefore, a set of variables, which describe the manifestations of persuasion in political communication texts, has been created. This study focuses on a set of selected posts from the official Facebook profiles of the given political parties from September and October 2018 before the elections to the municipal councils and senate, held on October 5-6, 2018. The elections campaign period was chosen for its character of increased persuasive appeal in communication of political subjects.
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Computational modelling of human voice propagation through the vocal tract and in space around the head
Švarc, Martin ; Pellant, Karel (referee) ; Švancara, Pavel (advisor)
The following master thesis deals with creating a computational model for acoustic wave distribution by the human vocal tract and then the space around a human head. Detailed mapping of the sound field around the human head is important for more accurate measurement of the human voice. Part of this work is the creation of three-dimensional finite element model of the human head and the vocal tract during phonation of the vowel /:a/ based on the data from the computational tomography. Further the literature search of the function of the vocal tract, biomechanics of the making of the human voice, an overview of the computational models so far published in the literature and in literature reported measurements of the distribution of the human voice by the vocal tract and then in the space around the head . The following is the actual numerical solution of the acoustic waves distribution from the vocal cords through the vocal tract and then the space around the human head when thinking of acoustic absorption on the walls of the vocal tract and on the skin of the head for different types of waking of the model. The results are compared with previously published measurements of the distribution of the human voice and mainly the distortion of the frequency spectra at each specific node in the space around the head and in its vicinity of where the sensor microphones are typically placed are analyzed. Results of the computational modeling will eventually be used for frequency correction for various positions of the microphones scanning the voice distribution in its diagnosis, speech or singing.
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Development of finite element model of human vocal tract and space around the head based on data from computer tomography
Švarc, Martin ; Pellant, Karel (referee) ; Švancara, Pavel (advisor)
This bachelor´s thesis deals with creating a computational model for acoustic wave propagation in vocal tract and the area near the head. The main objective of this work is to map the three-dimensional model of the human head as an additional acoustic environment for more accurate measurement of the human voice on the basis of data from computed tomography, the study of function of the vocal cords, biomechanics of the human voice and an overview of medical imaging techniques suitable for the display of biomechanical models. The grid for finite element method (FEM) will be created from solid geometry of the vocal tract (from the vocal cords to the lips) and the acoustic space near the human head. The grid will be created in order to obtain new knowledge about the different locations of a human head with microphone.
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Preparation of a presentation of computer physics - computer graphics, image processing and integral transformations
ŠVARC, Martin
The goal of this work is to introduce a subject of computer physics to the general public and especially to the prospective university students in an intelligible and popular way. A comprehensive presentation accompanied by this explanatory text is a part of the thesis. The presentation is divided into these chapters: History and development of computer technology, History and development of the computer (programming) languages, Personalities of the computer physics, Computer graphics, Image processing and integral transformation.
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