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Experimental Electro-Mechanical Musical String Instrument
Blasche, Ondřej ; Mojdl, Edgar (referee) ; Dlouhý, Dan (advisor)
The goal of this thesis is to design and build stringed mechanical electrphone with unusual sound characteristics. The end product is an instrument devided into three sections with specific options of sound creation, able to be both plucked and played with a bow. Thesis utilizes knowledge of electric guitar construction and their sound pickup methods. It also deals with experimentation in the field of strig instruments and their development.
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The Spectrum analysis of different single drums from a drum set differently tuned and played by different drumsticks
Cvetler, Dominik ; Mojdl, Edgar (referee) ; Jirásek, Ondřej (advisor)
The bachelor thesis deals with the analysis of the spectrum of membranophones, more precisely drums from the drum kit. Spectrum analysis evaluates aspects that affect the instrument’s spectrum, especially its inharmonicity and the generation of noise or tone modes. The aspects examined are the impact of the drumsticks hardness, the impact hit point on the drum membrane, the tuning of the resonance membrane and the presence of the tailpiece. The thesis examines inharmonicity in the spectrum with harmonic ratios between individual components in bands of harmonic series. The thesis also describes individual drums in terms of organology, drumsticks and membranes used for drums, the theoretical basis of creating membranophones sound and the way in which the measured samples were recorded and processed.
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The influence of the diameter and depth of the hole in the whistle on the timbre and directionality
Borovičková, Barbora ; Mojdl, Edgar (referee) ; Jirásek, Ondřej (advisor)
This bachelor’s thesis examines the influence of the diameter and depth of the holes in the recorder on the timbre and directionality of the resulting tone. For measurements and subsequent data analysis, nine flute body prototypes were made from three different materials and with three different wall thicknesses. During the measurement, holes with different diameters were drilled into the prototypes. Thanks to this procedure, it was possible to separate desirable influences from undesirable ones. The measured data were analyzed in the Matlab environment.
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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 Analysis of mutes on trombone and trumpet timbre
Košař, Vojtěch ; Mojdl, Edgar (referee) ; Jirásek, Ondřej (advisor)
This work deals with the sound mute issues, specifically how they affect the timbre of a trombone and a trumpet, their sound spectrum, levels of individual harmonic tones, the presence of formants and the directional characteristics of individual tones played in various dynamics. A part of this work is also focused on the theoretical description of a trombone and a trumpet, including their brief history, their classification, the parts they are consisting of and the timbre. The theoretical part is further dealing with the description of mathematic functions like FFT or LPC analysis, which have been implemented in the MATLAB environment when creating the graphic dependents for this theme.
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