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Application for Measurement of Room Impulse Responses
Vrbík, Matouš ; Balík, Miroslav (referee) ; Schimmel, Jiří (advisor)
This paper studies problematics of room impulse response measuring. Signals appropriate for measuring are mentioned, with emphasis on stepped sine signal (sweep) and MLS signals. Measuring methods suitable for particular signals are introduced. Another parameter characterizing room qualities is reverberation time. Theoretical and practical methods for determination of this parameter are described. First part of this thesis offers solution in MATLAB environment. Functions for generating measuring signals and for subsequent processing of measured data were created. In second part of this thesis, methods were implemented in C++ language and standalone application, which uses ASIO technology, was created.
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Mechanical waves of air particles set in motion by a vibrating body
Coufalová, Kristýna ; Suchánek, Jiří (referee) ; Klodová, Lenka (advisor)
The work deals with the sound in its various forms outside the music scene in connection with fine arts. Experimentally modulates different positions between visual and audio elements. Do the musical components of shows and exhibitions only serve to manipulate emotions, or are they original autonomic works? The artistic result will be the creation of an experimental situation of direct confrontation of sound with live action. The work was significantly affected by the coronavirus pandemic, so it deals more specifically with sound/music in the virtual space and the issue of their transmission.
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Water level measurement
Seifert, Jiří ; Háze, Jiří (referee) ; Šteffan, Pavel (advisor)
This thesis is dealt with measurement of water level. Measurement is palced in the concrete container under the ground. It was choosen an ultrasonic sensor as an optimal result. The sensor is placed in the safety container IP 65 and it is placed outside into container. The part of water level measurement is the system of the autocalibration. The signal of the sensor is evaluated by ARM microcontroler ESP8266EX. Calculated water level is broadcasted by WiFi modul to server.
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Determination of the Material Acoustic Impedance
Vozárová, Juliana ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This diploma thesis deals with the determination of the material acoustic absorption in an impedance tube. The aim of the work is to propose a measuring experiment and to design measuring device with the intention of reducing costs. The aim is to carry out a measuring experiment on a manufactured measuring device. The results of the experiment are evaluated in terms of meeting the requirements formeasuring device. The results of the tested materials are compared with the values from the supplier.
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Design and Realization of Acoustic Treatment of Small Recording Studio
Tkadlec, Vojtěch ; Husník, Libor (referee) ; Schimmel, Jiří (advisor)
This bachelor thesis deals with the topic of acoustic properties of an enclosed space, their detection and modification. The thesis examines the acoustic properties of a small enclosed space, which were determined by simulation using a virtual 3D model and subsequently verified by measurement. After finding out the properties, a substantial part was also devoted to their modification, where the task was to design the acoustic elements so that the resulting length of the reverberation time corresponds to the optimal values for a small recording studio. The design of the elements is followed by their construction, followed by a re-measurement of the space. Furthermore, the work summarizes the principles of modeling and simulation of 3D models.
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Spectral analysis of sound in spatial acoustics
Křenek, Jakub ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
This thesis is focused on the basics concepts of room acoustics and used sound level meters. The first part focuses on the spatial acoustics and acoustic quantities used in it. Next part of thesis describe the structure and features of sound level meters. Following chapters are concerned on the PULSE system architecture and data analysis. PULSE platform contributes multi-spectral analyzer type 3560B PULSE, programming environment LabShop and microphones for difuse and free fields. The practical part describes the installation, setup and the measurement of reverberation time in the Labshop environment.
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An air conditioning in the shopping center
Pospíšil, Tomáš ; Uher, Pavel (referee) ; Rubinová, Olga (advisor)
The bachelor thesis is divided into three parts: theoretical, computational and projection. In the practical part of the bachelor's thesis I solve the design of the air-conditioning of the shopping center, which includes the main commercial space and the respective rooms. In the theoretical part I deal with acoustics in air-conditioning. Sources of noise and possibilities of their attenuati-on.
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Flat Plates Noise
Zlámal, Josef ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
The master thesis summaries the findings results of a study focused on the spread of noise vibrating flat plates. Part of this thesis is measurements of flat plate noise in the anechoic chamber and finally their processing and evaluation. The next part of the thesis is focused on FEM acoustic simulation and comparing results with measurements.
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Noise map
Lokaj, Jiří ; Kubičková, Alena (referee) ; Rozman, Jiří (advisor)
The aim of this paper is to introduce the measurement of noise and create a noise map in a geographic information system. The first part is focused on describing the physical properties of sound in space, atmospheric and physiological acoustics. It also deals with the physiological effects of noise on the human body and technology needed for measure and process noise. Other part describes the structure of a geographic information system and noise map. The last part is about the practical creation of noise maps, includes a description of the real measurement results and evaluation
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