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Non-destructive Detection Methods of Biological Activities Wood-destroying Insects
Kintr, Jindřich ; Král, Bohumil (referee) ; Fiala, Pavel (advisor)
The subject of this thesis is to study a non destructive methods and methodologies of detection biological wood pests. Analyzed method of detection in this thesis is non destructive acoustic detection. For scanning the activity of wood pests a sensor with piezoelectric converter is used and for scanning the ambient sound a sensor with an electret microphone is used. The signals from these sensors are subtracted in a differential amplifier. In this thesis we can find a method determine the similarity of two signals and a laboratory measuring of detection of activity of a wood pests (Hylotrupes bajulus).
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Modeling electroacoustic systems in COMSOL
Hanuš, Jan ; Honzík,, Petr (referee) ; Schimmel, Jiří (advisor)
The thesis aims to explore the simulation software COMSOL Multiphysics with relevance to the field of electroacoustics. The work covers general introduction to the software, including an outline of the principles of finite element method, which is the most widely used numerical method in COMSOL Multiphysics. It also includes a clear description of the individual steps required to create a simulation. Furthermore, the Acoustics Module is described, Pressure Acoustics physics interface in particular as it is used later on in the simulations. The AC/DC Module and its physical interface Electric Circuit is mentioned briefly as well. Finally, the simulations created by the author are explained in a step-by-step manner. These look at the impact of the membrane’s and waveguide’s geometries on the radiation of the speaker driver, and the shapes of the loudspeaker system’s enclosure with the edge diffraction phenomena in mind. The results of the individual simulations are presented using graphs and discussed afterwards.
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Non-destructive Detection Methods of Biological Activities Wood-destroying Insects
Kintr, Jindřich ; Král, Bohumil (referee) ; Fiala, Pavel (advisor)
The subject of this thesis is to study a non destructive methods and methodologies of detection biological wood pests. Analyzed method of detection in this thesis is non destructive acoustic detection. For scanning the activity of wood pests a sensor with piezoelectric converter is used and for scanning the ambient sound a sensor with an electret microphone is used. The signals from these sensors are subtracted in a differential amplifier. In this thesis we can find a method determine the similarity of two signals and a laboratory measuring of detection of activity of a wood pests (Hylotrupes bajulus).
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Reflextion of technologies of electroacoustic music in vocal and instrumental music
Lukeš, Jiří ; RATAJ, Michal (advisor) ; BARTOŇ, Hanuš (referee)
The present text of the thesis discuss the technology and its impact on the composer's compositional work . Current music scene we called artificial music in principle pervades the world of acoustic sound to the world of electroacoustic sound, which is a major field of researches of art music for several decades.
Continuous development and improvement of the technologies in the context of better accessibility in practice means increasing infiltration of technology solutions to the triangle composer - performer - listener . The main focus of the text consists of analytical probes into the current technological solutions and their subsequent contribution to the work of the composer. Technology can play a role of analyse, interpretation, and indirectly also compositional realisation. The knowledge gained in electroacoustic techniques then embedded in the context of acoustic compositional techniques , resulting in many times possibilities for classification of sound through different optics. An important role for the sound still plays a space. The work deals with the meaning of the word space both in terms of architectural design , and the view of possibility to create virtual space. The penultimate chapter gives the reader an insight into the field of generative music through the project Mysticism fragrance. Final text summarization aims primarily to identify and map out possible solutions for composing in the context of the technologies which we can use today .
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