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Acoustic Detection of Speaker Position Using Microphone Array
Pelz, Zdeněk ; Novotný, Ondřej (referee) ; Szőke, Igor (advisor)
This thesis explores problematics of speaker localization using microphone array. Aim of this thesis is implementation of algorithms for speaker localization and experiments with those algorithms. Calculation of TDOA was done using cross-correlation and hyperbolic method was used to calculate position estimation. Finished microphone array is able to locate speaker within certain variance. Results of this thesis allow reader to make assumptions regarding accuracy of localisation using microphone array and ARM kit with limited performance. Precision of position estimation using microphone array reached several decimeters, but this precision is dependent on distance from microphone array.
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Correlated probe and electron microscopy for the study of modern magnetic nanomaterials
Novotný, Ondřej ; Flajšman, Lukáš (referee) ; Pavera, Michal (advisor)
High pressure on the development of new magnetic materials and their miniaturization also emphasizes the development of new analytical techniques. This diploma thesis deals with the development and demonstration of correlated magnetic force and electron microscopy, which is a promising tool for the characterization of magnetic nanomaterials. The first part of this thesis describes the fundamental physics of micromagnetism with a focus on cylindrical nanofibers. The following pages describe optic, probe, electron, and synchrotron methods for mapping the magnetic properties of materials. The next part describes magnetic domain wall motion in cylindrical nanowires performed as a part of a more extensive material study. The last part of the thesis describes the development of correlated magnetic force and electron microscopy on LiteScope device. A production of magnetic probes was designed and successfully tested. Probes were fabricated by focused electron beam-induced deposition from the Co2(CO)8 precursor. Further, the developed correlated microscopy is demonstrated on a multilayer PtCo sample, magnetic cylindrical nanofibers, NiFe vortex structures, and FeRh metamagnetic nano-islands.
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Web-Based Demonstration of Linear Filters Design
Pospíšil, Ondřej ; Černocký, Jan (referee) ; Novotný, Ondřej (advisor)
The aim of this work is to create a demonstration application focused on the design of digital filters. In the first chapters we outline the theory of digital filtration and design of digital filters. Then we summarize and evaluate the existing solutions. The following chapters describe the design and implementation of the actual application.
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Residential Complex in Brno - Komín
Novotný, Ondřej ; Františák, Luboš (referee) ; Nový, Vítězslav (advisor)
Residential complex is located in district Brno-Komín surrounded by garden colonies among Pastviny and Houškova streets. Local structures are characterized by significant diversity, where the old village houses, block of flats from 80s, and detached houses from 21st century are represented. The design is not trying to enter local structures inappropriately. The major afford is to combine high density and low-rise housing with quality of public space. We are able to understand whole area as the border between the city structures and countryside, that is soften by designed objects. Complex is formed by three main buildings, which also confront the idea of baugruppe. Houses combine characteristics of block of flats and detached houses.
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Design of assist robot
Novotný, Ondřej ; Látal, Roman (referee) ; Kučera, Petr (advisor)
The aim of the Bachelor thesis is design of frame and lifting mechanism of assist robot called „Bob“. The thesis consist of several construction design of mechanism and gears, final solution control and creating of prototype. For the materiál of frame construction was chosen the aluminium because of its hardness and weight. The chassis of robot is 3-wheeled construction unable passing through threshold. The motor for robot drive was chosen DC motor with 500 rpm and torque 600 Nmm, which is placed inside of front wheels. For the lifting mechanism was chosen the motion screw with trapezoidal screw-thread Tr 10x3 made by DIN 103 from C15 steel. Another part of the thesis was create of the prototype for testing whole mechanisms and gears.
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Adaptation of Speaker Recognition Systems
Novotný, Ondřej ; Pešán, Jan (referee) ; Plchot, Oldřich (advisor)
In this paper, we propose techniques for adaptation of speaker recognition systems. The aim of this work is to create adaptation for Probabilistic Linear Discriminant Analysis. Special attention is given to unsupervised adaptation. Our test shows appropriate clustering techniques for speaker estimation of the identity and estimation of the number of speakers in adaptation dataset. For the test, we are using NIST and Switchboard corpora.
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Mobile Applications for Real-Time Noise Removal
Siladi, František ; Skácel, Miroslav (referee) ; Novotný, Ondřej (advisor)
The goal of this bachelor's thesis is to create a mobile application which will remove the noise from speech in real time. The first chapter describes the theory related to signal processing and described filters for denoising. The following chapter summarizes existing solutions. The third chapter contains my own design and implementation. At the end of this thesis is the evaluation of the application and evaluation from users.
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Psychoacoustical Measurement of Binaural Hearing Characteristics
Novotný, Ota ; Trzos, Michal (referee) ; Schimmel, Jiří (advisor)
This diploma thesis deals with a binaural hearing issues (it means hearing by both of ears), a human hearing ability to locate position of a sound source at three-dimensional space and parameters that affect this ability. In the second part, it focuses on psychoacoustic experiment, its main features and errors that can occur and which affect a results credibility. Method of pair comparisons is described more closely here. The last part of this thesis describes a technical solution of experiment in Java environment. The application should have a graphical interface and should be able to register a new user and perform a psychoacoustical experiment. The process of experiment is following. The aplication selects a random position of defined virtual sound source on the defined range and it plays this sound into headphones on button click. The users task is to set the application controls, representing a virtual sound source position, that way, where the user hear the sound come from. On another button click the application plays the same sound, but this sound comes from application controls set position (set by user). User compares this pair of sounds and modifies the position of second sound source until these two positions are same. The application stores these results for later processing on another button click. Principles of generating testing sound sources (sine wave, narrowband noise and sound file with wav extension) and their 3D positioning by measured head model impulse responses correlation are described thereinafter. An ability of human hearing system to locate a virtual sound source in dependence on sound parameters is discussed in conclusion.
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ResPublica/Civitas Socialis - Vision Křídla
Novotný, Ondřej ; Hudec, Mojmír (referee) ; Nový, Vítězslav (advisor)
The goal of diploma thesis is urbanism and architecture study of village central part, reconstruction of municipal house and new house of fire department and community center in Kridla. The village itself is located six kilometres far away from Nove Mesto na Morave in Bohemian-Moravian highlands. The design is not trying to enter local structures inappropriately. The major affort is to combine different functions and activities with quality of public space and respect of countryside area. One of the goals is also to provoke discussion about vision for the next 30 years among inhabitants of Kridla.
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