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Variable Two-Way Loudspeaker Cabinet - Laboratory Tool
Rehák, Jan ; Schimmel, Jiří (referee) ; Balík, Miroslav (advisor)
The objective of this work is to build a two-way loudspeaker system that will enable changing loudspeaker topology in both vertical and horizontal axes and to suggest two laboratory tasks. The theoretical part of this work will briefly discuss loudspeaker crossovers. Then it will discuss how topology of loudspeakers in a loudspeaker system can affect its behavior at crossover frequency. Frequency characteristics of various loudspeaker baffles will be shown. On these, the effect of a baffle’s exterior on its behavior will be discussed. A two-way loudspeaker system will be designed. The construction process and drawings of each part are also included in this work. The finished product will be tested and, following from these tests, a conclusion will be drawn about the validity of the theoretical assumptions of its design. After that, appropriate parameters of a crossover for the two-way loudspeaker system will be chosen.
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Vybrané aspekty vlivu bezobratlých herbivorů na složení travinného společenstva
HRUBÁ, Karolína
The first part of my thesis is focused on observation of the leaf damage by invertebrate herbivores during season. I examined how the selected traits affect the palatability of plant species. In the next project, I investigated the effect of herbivory and gaps on seedling establishment. And finally, in the last part, I studied the effect of herbivory of terrestrial gastropods on competitive relationships among selected species.
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Interval linear systems with linear dependencies
Král, Ondřej ; Hladík, Milan (advisor) ; Rada, Miroslav (referee)
The main problem discussed in this thesis is about finding an enclo- sure of the solution set of an interval linear system with linear dependencies. We get familiar with definitions from interval arithmetic and analysis. Then we extend them to matrices and linear systems, where we introduce several modern approaches to finding an enclosure and divide them thematically. Most of them are implemented in MATLAB using INTLAB library. We compare their precision and computational time on Toeplitz, symmetric and random matrices. For depen- dencies we design our memory saving representation. The results are interpreted and the final function, which can compute either fast, sharp or memory efficient, is build on individual methods. Powered by TCPDF (www.tcpdf.org)
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Up-firing loudspeakers for 3D Audio
Pešek, Marko ; Schimmel, Jiří (referee) ; Balík, Miroslav (advisor)
This bachelor theses dealing with study multichannel 3d audioformat Dolby Atmos and parameters of up–firing loudspeakers, which assures overhead audiosignal reproduction coming towards hearer. According to the knowledge is made proposal of up–firing loudspeakers, fabrication and measurement their properties.
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Business Register of Financial Statements of Companies
KALÍŠKOVÁ, Anna
My thesis is focused on the Business Register of Financial Statements of Companies. This thesis is divided into two parts. Firstly, the basic characters of Financial Statements are described, for example the balance sheet, the income statements, the statement of cash flow, audit of the financial statement. Companies must publish their financial statements in the business register. The practical part is focused on the analysis of this obligation. In the end this thesis has been evaluated situation in publication of the financial statements. 50 % of companies published the financial statements in 2010. There are differences in the publication of the financial statements of individual group of companies. For example it is in legal form. The publication of the financial statements for joint stock companies is around 75 %, but the publication of general partnership is only 20 %.
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Optimization of the Bank Loan Application
Skovajsa, Radek ; Kořínková, Martina (referee) ; Čižinská, Romana (advisor)
The work is based both on theoretical basis and practical working processes of banks for assessing client's financial standing in Czech market environment. Basic preconditions for successful credit allocation to a business entity will be set along with evaluation of the importance of information from a credit requisition form's compulsory enclosure. A detailed analysis of the client's economy from a bank perspective will be succeeded by identification of critical risks and positives of an applicant's financial position.
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Two-way stereo speaker system
Kočvara, Pavel ; Polák, Ladislav (referee) ; Kratochvíl, Tomáš (advisor)
The Bachelor thesis deals with design of a passive two-way stereo speaker system with performance 50 W RMS / 8 for normal domestic use. With respect to its sensitivity 90 dB/W/m mid-range speakers Beyma 5MP50/N and tweeter Beyma T2030 were used. The enclosure is a type of bass-reflex and it is made of MDF material with internal damping from polyurethane coat.
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Loudspeaker design for home environment
Šafer, Radim ; Schimmel, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
The subject of my bachelor‘s thesis is a design of the loudspeaker for home listening. Foremost I focused on simulations of the loud-speakers, which I use to a design itself. The loudspeaker is a two-way and stereophonic, which is optimised for a woofer Beyma 6B30/P and a tweeter Beyma T2010. The enclosure is closed, made of the M.D.F. material. The vibration damping is ensured by a polyester damping cottonwool. The maximum standardised wattage of the loudspeaker is 50 W, nominal impedance is 8 ?, internal capacity is around 15 litres, sensitivity 90 dB and weight 10 kg.
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Design and Implementation of Active Loudspeaker System with Digital Input
Uchytil, Filip ; Balík, Miroslav (referee) ; Schimmel, Jiří (advisor)
The work is focused on a design of an active loudspeaker system with a bi-amp amplifier and a digital input. There is described the theory of a loudspeaker enclosure design and its practical implementation. Furthermore the work deals with a design and construction of input circuits such as a preamplifier, Baxandall tone control, active crossover, all-pass filter and S/PDIF. On the basis of the amplifier´s theory the optimal construction of amplifiers and their design are selected. The complex design of the loudspeaker box is devised so that it would reach a maximum acoustic power during the preservation of a low distortion.
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