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Web applications supporting education of audio signal processing
Malcher, Tomáš ; Mokrý, Ondřej (referee) ; Rajmic, Pavel (advisor)
This bachelors thesis deals with a creation of web applications using JavaScript language. These web applications should be helpful in signal processing classes by showing and explaining different phenomenons to students. Students can see how different parameters affect the outcome of said issue. The theory needed for understanding and implementation is covered by this thesis. Thesis covers key parts of the code of said web applications and the libraries used for their implementaition.
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Optimization of the permanent magnet machine based on the artificial inteligence
Kurfűrst, Jiří ; Duroň,, Jiří (referee) ; Singule, Vladislav (referee) ; Ondrůšek, Čestmír (advisor)
The dissertation thesis deal with the design and the optimization of the permanent magnet synchronous machine (SMPM) based on the artificial intelligence. The main target is to apply potential optimization methods on the design procedure of the machine and evaluate the effectiveness of optimization and the optimization usefulness. In general, the optimization of the material properties (NdFeB or SmCo), the efficiency maximization with given nominal input parameters, the cogging torque elimination are proposed. Moreover, the magnet shape optimization, shape of the air gap and the shape of slots were also performed. The well known Genetic algorithm and Self-Organizing migrating algorithm produced in Czech were presented and applied on the particular optimization issues. The basic principles (iterations) and definitions (penalty function and cost function) of proposed algorithms are demonstrated on the examples. The results of the vibration generator optimization (VG) with given power 7mW (0.1g acceleration) and the results of the SMPM 1,1kW (6 krpm) optimization are practically evaluated in the collaboration with industry. Proposed methods are useful for the optimization of PM machines and they are further theoretically applied on the low speed machine (10 krpm) optimization and high speed machine (120 krpm) optimization.
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Analysis of Spectra of Electric Guitars Made of Various Materials
Zezulová, Eliška ; Musil, Jaroslav (referee) ; Jirásek, Ondřej (advisor)
Bachelor‘s thesis focuses on the spectral analysis of two electric guitars. The Cort X-6 electric guitar is used for harder genres of music. The second Fokus-H Strat guitar is more of a rock-universal type of instrument. The work deals with the spectrums of tones using various guitar pickups and analyzes them with the use of psychoacoustic measurements in the perception of timbre. It examines variations in the sound spectrum when there’s a manipulation with tone and gain controls. The measured values of the tone control are divided into thirds of the potentiometer range. The volume has been halved. The following is a look at the change of sound spectrum when using a harder plectrum. The end of the work is devoted to the difference in colors of two tones that were recorded under the same conditions. Their difference lies in the way of holding the neck of an electric guitar.
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Barriers of renewable sources expansion in the Czech Republic
Lukášek, Kamil ; Březina, Ladislav (referee) ; Mastný, Petr (advisor)
Currently, there is no publication that concerns the renewable resources comprehensively in the Czech Republic. This publication defines the renewable resources in general meaning. Whereas the physical and legal definitions of the renewable resources are different, text explains the principle of production of electricity according to the legal definition. When the renewable resources are being constructed, it's important to achieve the optimal operating conditions. To achieve these conditions, it's necessary to locate the renewable resource in the Czech Republic. The operations of renewable resources are partly financed by the country, in order to be more interesting for the investors. Further on, the conditions of connection to electrical distribution system are defined. The impact of renewable resources on electrical distribution system. Finally the conception of renewable electrical energy resource for region of East Bohemia is designed.
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Generator of Harmonic Sounds and Chords
Bednář, Jan ; Mašek, Jan (referee) ; Schimmel, Jiří (advisor)
Major aim of this bachelor’s thesis is creation of VST plug-in module, that is able to generate sound for more tones in the same time. This thesis describes a brief theory of music acoustics which aims to show basic relations between tones, their higher harmonics and impact on the sound color. The function of temperament system of tuning, relations between intervals and way of making chords is described. Next things mentioned in this thesis are basics of VST technology, how to programme with VST SDK and basic MIDI messages for implementation in VST plug-in.
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Doble-balanced mixer - laboratory equipment
Dušek, Libor ; Baran, Ondřej (referee) ; Vágner, Petr (advisor)
The aim of this work was double-balanced mixer implementation, which will be used like laboratory equipment. This thesis deals with design of the double-balanced mixer from first theoretical principles to a practical design of a laboratory equipment. For the practical design the integrated mixer SA612 was used. Input signal to the mixer up to 500 MHz frequency can be used. For required operation external oscillator and fifth-order low pass filter were constructed. Oscillator was designed for fixed frequency 32 MHz. Fifth-order low pass filter was inserted between the mixer and the oscillator, because of filtering higher harmonics. The second aim of the work was measuring double-balanced mixer basic parameters, such as Compression Point (P-1dB) and Intercept Point (IP3). For the IP3 measurement, another one device was required. It consists of the power combiner for mixing two frequency close signals and third-order bandpass filter, which selects required frequency band. Finally, the laboratory equipment was fabricated and its real parameters were measured.
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Web applications supporting education of audio signal processing
Malcher, Tomáš ; Mokrý, Ondřej (referee) ; Rajmic, Pavel (advisor)
This bachelors thesis deals with a creation of web applications using JavaScript language. These web applications should be helpful in signal processing classes by showing and explaining different phenomenons to students. Students can see how different parameters affect the outcome of said issue. The theory needed for understanding and implementation is covered by this thesis. Thesis covers key parts of the code of said web applications and the libraries used for their implementaition.
|
|
|
Analysis of Spectra of Electric Guitars Made of Various Materials
Zezulová, Eliška ; Musil, Jaroslav (referee) ; Jirásek, Ondřej (advisor)
Bachelor‘s thesis focuses on the spectral analysis of two electric guitars. The Cort X-6 electric guitar is used for harder genres of music. The second Fokus-H Strat guitar is more of a rock-universal type of instrument. The work deals with the spectrums of tones using various guitar pickups and analyzes them with the use of psychoacoustic measurements in the perception of timbre. It examines variations in the sound spectrum when there’s a manipulation with tone and gain controls. The measured values of the tone control are divided into thirds of the potentiometer range. The volume has been halved. The following is a look at the change of sound spectrum when using a harder plectrum. The end of the work is devoted to the difference in colors of two tones that were recorded under the same conditions. Their difference lies in the way of holding the neck of an electric guitar.
|
|
|
Generator of Harmonic Sounds and Chords
Bednář, Jan ; Mašek, Jan (referee) ; Schimmel, Jiří (advisor)
Major aim of this bachelor’s thesis is creation of VST plug-in module, that is able to generate sound for more tones in the same time. This thesis describes a brief theory of music acoustics which aims to show basic relations between tones, their higher harmonics and impact on the sound color. The function of temperament system of tuning, relations between intervals and way of making chords is described. Next things mentioned in this thesis are basics of VST technology, how to programme with VST SDK and basic MIDI messages for implementation in VST plug-in.
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Barriers of renewable sources expansion in the Czech Republic
Lukášek, Kamil ; Březina, Ladislav (referee) ; Mastný, Petr (advisor)
Currently, there is no publication that concerns the renewable resources comprehensively in the Czech Republic. This publication defines the renewable resources in general meaning. Whereas the physical and legal definitions of the renewable resources are different, text explains the principle of production of electricity according to the legal definition. When the renewable resources are being constructed, it's important to achieve the optimal operating conditions. To achieve these conditions, it's necessary to locate the renewable resource in the Czech Republic. The operations of renewable resources are partly financed by the country, in order to be more interesting for the investors. Further on, the conditions of connection to electrical distribution system are defined. The impact of renewable resources on electrical distribution system. Finally the conception of renewable electrical energy resource for region of East Bohemia is designed.
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