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Laboratory Device for Measuring Headphones
Holub, Kamil ; Číž, Radim (referee) ; Schimmel, Jiří (advisor)
This bachelor's thesis deals with the design and assembly of headphones test fixture. The introduction describes the types of headphones, their classification in terms of design and their typical specifications followed by a description of instruments for measuring headphones, defined by standards ČSN EN 60318 and their classification in terms of design and use. The following part is devoted to a design of a test fixture, which is subsequently put together using 3D printing. As part of the thesis, the measurement of frequency response and input impedances of various headphones is performed on the fixture. These are then compared with measurements on professional measuring devices. In the last part is described a laboratory task, which includes the measurement of headphones using this test fixture.
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Design of magnetoplanar headphones with amplifier
Chyťa, Filip ; Búran, Martin (referee) ; Skácel, Josef (advisor)
This work deals with comparison of individual types of electroacoustic transducers, their properties and practical use. Furthermore, design and manufacture of a magnetoplanar transducer, its integration into headphones and the production of headphone amplifier. The first chapter summarizes all types of electroacoustic transducers, their properties, advantages, disadvantages, and their use in practice. The second chapter deals with the classes of amplifiers. The third chapter deals with the choice of design of a magnetoplanar transducer, headphones, and selected type of headphone amplifier. The last chapter describes the production process of individual parts of the headphones, transducer and amplifier, including the final measurement.
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The Business Plan for Establishing of Small Company
Valenta, Roman ; MBA, Michal Bábíček, (referee) ; Koráb, Vojtěch (advisor)
This diploma thesis deals with the creation of a business plan. This plan is concerned with the startup of an online store which specializes in speakers, headphones and accessories. The thesis explores business plan theory and utilizes the SLEPTE, SWOT and McKinsey 7S analyses complemented by an analysis of my own research. Based on the above mentioned information, the business plan itself is drawn up.
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Hybrid headphone amplifier for the high-end listening and performance
Čacký, Adam ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor´s thesis describes the design of a high quality small portable headphone amplifier for dynamic headphones. Part of the work is theoretical assumptions for the optimal design and implementation of peripheral involvement, comparing the properties of components used and the resulting parameters of modeled device. Analyses of the electrical quantities of the circuit created in simulation software are enclosed.
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Matrix headphone amplifier for studio monitoring
Štěrba, Václav ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor´s thesis describes the design of a matrix headphone amplifier for studio monitoring. The proposed amplifier is a purpose-built device to be used in studio sound recording for the mixing of multiple audio channels directed to the interpreters´or performers´ headsets. The device is basically composed of the following parts: An input section for the audio line, a mixing section which secures the setting of individual input levels for each output, an amplifier section allowing the setting of the output signal level for each output, and an output section enabling the connection of headphones. The equipment utilizes a connection to a multi-channel audio signal bus; this bus also provides for remote power supply to all the connected devices. The solution described in the thesis can be defined as alternative monitoring that facilitates quick and easy connection of a required number of monitoring points (in other cases, such monitoring is usually realized by means of individual small mixing consoles).
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Pure tone audiometry
Maršálková, Leona ; Harabiš, Vratislav (referee) ; Chmelař, Milan (advisor)
The presented master’s thesis deals with the acoustics, specifically with the selected characteristics of the sound. It focuses on the anatomy of the auditory system and its function. The work describes the testing approaches for an evaluation of the auditory organ function and introduces modern methods used for the hearing tests, especially pure tone audiometry. A part of the thesis is dedicated to a concept of an audiometer for pure tone audiometry, which is presented in a detailed block diagram along with a description of its working components. Included chapters describe the partial circuits of the audiometer supplemented by the calcuations of its individual elements. The concluding part of the thesis deals with the evaluation of the device’s functionality.
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Design of Audio Headphones
Madaras, Patrik ; Řezníček, Svatopluk (referee) ; Zvonek, Miroslav (advisor)
The main theme of this bachelor thesis is analasis of market and design of medium or small headhones with headband. This design is focused on maximum value that is based on storability and control that respects human ergonomy and can be able to perform role of product with versatile aesthetics that isn‘t weight by trends.
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Design of Headphones
Vítek, Jan ; Rubínová, Dana (referee) ; Zvonek, Miroslav (advisor)
The theme of my bachelor thesis is analysis and design of headphones suitable for sport, with headband and volume and song control. In this thesis I focus on ergonomic, construction and esthetic quality of my design. The target of my thesis is to unite modern design with intuitive control.
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The effect of headphone and loudspeaker reproduction on classical music mix balance
Hadraba, Jakub ; ZIKMUND, Tomáš (advisor) ; SYROVÝ, Václav (referee)
Primary focus of the dissertation is comparison of loudspeaker and headphone reproduction and its influence on the mix balance of classical music recordings.
A listening test, which represents an essential part of the thesis, was performed on a test group of sound engineers who prepared mixes of selected recordings using both loudspea-kers and headphones. An analysis of the resulting mixes was performed to find out if any systematic changes could be detected between headphone and loudspeaker mixes. The results disclosed a systematic change in preference of reverberation. Individual approaches of the sound engineers are documented by an extensive graphical section of the thesis. Level of stability of the individual models has been examined using repeated testing on selected participants.
Selected headphone and loudspeaker mixes have been further evaluated by a listening group in a second listening test. Differences between the mixes were judged using both loudspeakers and headphones. Answers of the participants were analysed to see if there was an increased preference of headphone mixes when judged using headphones and vice versa. The results didn't show significant preference changes based on type of reproduction. The selected mixes weren't found to be "more optimal" when listened to on their respective reproduction device, nor could they be identified based on the subjective preference test.
A special part is devoted to evaluation of an internet-based survey featuring a statistical documentation of loudspeaker and headphone usage in todays music recording industry. Special look has been taken at the group of respondents who indicated classical music as primary music genre of their profession. Another theoretical part of the thesis covers the artistic and technical approach of sound engineers to classical music sound image creation, including commonly used technical resources and stylization methods.
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