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The Spectrum analysis of different types of saxophones
Greiplová, Barbora ; Mojdl, Edgar (referee) ; Jirásek, Ondřej (advisor)
The bachelor thesis deals with the sound of three types of Yamaha saxophones, specifically soprano, alto and tenor saxophone. Lists the basic parameters of the instrument, how it forms the tone and how it is typical. It focuses on characteristics in its tone using spectral analysis, LPC analysis and directional characteristics. The work focuses on the common properties of saxophones as instruments, it also looks for differences between selected types of saxophones and between individual tones. The results are compared in graphs, tables and verbal evaluation.
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The spectral and directional analysis of xylophone, vibraphone and glockenspiel
Hoffman, Pavel ; Indrák, Michal (referee) ; Jirásek, Ondřej (advisor)
Bacherlor‘s thesis deals with spectral analysis and directional characteristics of idiophonic instruments, xylophone, vibraphone and glockenspiel. It analyzes various details during spectral analysis, that could have an effect on the spectrum of a given instrument, and especially on its inharmonicity, thus analyzing its effect on the hardness of mallet, dynamics and the location of the mallet striking the bars (stones, wooden plates). It examines the changes in the harmonic range and the formant areas of instruments. The thesis further describes the mallets, the instruments themselves, theoretical base and the means by which the sound samples were acquired and processed.
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Analysis of Influence of Hardness and Alteration of Piano Hammer on Strength and Spectrum of Signal
Mikulášková, Aneta ; Musil, Jaroslav (referee) ; Jirásek, Ondřej (advisor)
The bachelor’s thesis deals with the analysis of the time-varying spectrum of sound of the piano series 125 and M 110 by PETROF and the influence of intonation on this spectrum. It analyzes the higher harmonic components in relation to the force applied to strings and the use of variously tuned hammers. Bachelor’s thesis observes the effect of the dynamics of keystroke and intonation on the pitch of the tone in its time and frequency plane and tone’s energy loss in relation with the dynamics. Further, the thesis describes the way of measuring and recording the captured tone samples and their subsequent processing and analysis in the application created in MATLAB development environment.
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The dreadnought rib guitar innovation
Hoffman, Pavel ; Nop, Patrik (referee) ; Jirásek, Ondřej (advisor)
This diploma thesis deals with the spectrum analysis, frequency characteristics, Chladni figures and simulation of modal and harmonic analysis of an acoustic guitar in ANSYS program interface. In the acoustic guitar analysis, various details that can influence the instrument spectrum are discussed. Especially on its performance over time, the number of generated harmonic components and their performance. Then the guitar bracing innovation of the dreadnought guitar was created from the measured, simulated and calculated data. Four acoustic guitars with the innovation were then made. These innovated instruments were further analyzed and compared with the acoustic guitar before the innovation and with a competitor’s guitar. Furthermore, the thesis describes parts of an acoustic guitar, wood properties, theoretical background and measurement methods.
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The Analysis of spectrum and polar pattern of French horn with different mouthpieces and different elastic resonators
Holba, Stanislav ; Ketner, Zbyněk (referee) ; Jirásek, Ondřej (advisor)
This bachelor thesis deals with the French horn and adjusting mouthpieces for this instrument. The work briefly describes the French horn, its structure, production materials, history and development, and the description of the timbre possibilities. Furthermore, the work explains the use of the fast Fourier transform algorithm in the context of analysis. A list of characteristics features of individual tools and mouthpieces used for analysis follows. The work then compares selected tone samples of natural and valve French horns from various manufacturers, their harmonic spectra, and directional characteristics. For specific tones, a list of chosen psychoacoustic quantities is given. The obtained values are linked with the mechanical characteristics of individual instruments and mouthpieces.
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Spectrum analysis of nylon strings
Leznar, Adam ; Hofman, Pavel (referee) ; Jirásek, Ondřej (advisor)
This thesis discusses instruments that use nylon strings in the context of sound quality. The thesis briefly discusses the history of the instruments, where they can be encountered and where they fit within musical instruments. In addition, basic acoustical, physical and mathematical principles relevant to understanding the subject are described. The measurement process and results are then described, comparing samples according to their excitation and how their spectra change at different positions.
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Analysis of the radiation of accordions and designing the spatial arrangement of microphones for their recording
Rapáč, Marek ; Musil, Jaroslav (referee) ; Jirásek, Ondřej (advisor)
This bachelor’s thesis deals with the analysis of the spectrum and directivity of three different accordions.Two of the analyzed instruments are piano accordions with standard basses, one accordion is a special type of piano accordion, the so-called bass accordion.The effect of the played tone and used register on the spectrum and on the directionality of the resulting tone is described. The resulting findings are also compared between different accordions. The final part of the thesis is devoted to the practical use of stereo microphone techniques for high-quality, faithful and listener-friendly recording of the accordion sound. In conclusion, these findings are evaluated and the most suitable stereo microphone technique for recording the accordion is presented here.
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The Spectrum analysis of different types of saxophones
Greiplová, Barbora ; Mojdl, Edgar (referee) ; Jirásek, Ondřej (advisor)
The bachelor thesis deals with the sound of three types of Yamaha saxophones, specifically soprano, alto and tenor saxophone. Lists the basic parameters of the instrument, how it forms the tone and how it is typical. It focuses on characteristics in its tone using spectral analysis, LPC analysis and directional characteristics. The work focuses on the common properties of saxophones as instruments, it also looks for differences between selected types of saxophones and between individual tones. The results are compared in graphs, tables and verbal evaluation.
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The dreadnought rib guitar innovation
Hoffman, Pavel ; Nop, Patrik (referee) ; Jirásek, Ondřej (advisor)
This diploma thesis deals with the spectrum analysis, frequency characteristics, Chladni figures and simulation of modal and harmonic analysis of an acoustic guitar in ANSYS program interface. In the acoustic guitar analysis, various details that can influence the instrument spectrum are discussed. Especially on its performance over time, the number of generated harmonic components and their performance. Then the guitar bracing innovation of the dreadnought guitar was created from the measured, simulated and calculated data. Four acoustic guitars with the innovation were then made. These innovated instruments were further analyzed and compared with the acoustic guitar before the innovation and with a competitor’s guitar. Furthermore, the thesis describes parts of an acoustic guitar, wood properties, theoretical background and measurement methods.
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The Analysis of spectrum and polar pattern of French horn with different mouthpieces and different elastic resonators
Holba, Stanislav ; Ketner, Zbyněk (referee) ; Jirásek, Ondřej (advisor)
This bachelor thesis deals with the French horn and adjusting mouthpieces for this instrument. The work briefly describes the French horn, its structure, production materials, history and development, and the description of the timbre possibilities. Furthermore, the work explains the use of the fast Fourier transform algorithm in the context of analysis. A list of characteristics features of individual tools and mouthpieces used for analysis follows. The work then compares selected tone samples of natural and valve French horns from various manufacturers, their harmonic spectra, and directional characteristics. For specific tones, a list of chosen psychoacoustic quantities is given. The obtained values are linked with the mechanical characteristics of individual instruments and mouthpieces.
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