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Loudspeaker Box for Wavefield Synthesis
Naňák, Pavel ; Kubánek, David (referee) ; Schimmel, Jiří (advisor)
Purpose of this work is to design active loudspeaker system as a source of sound proper for wavefield synthesis. Loudspeaker system is considerate as a singleband and its length should not overlap 15cm. System should be designed at the best in parameters like frequency characteristic and directional characteristic. Part of work is dedicated to theoretical aspects, explanation of wavefield principles itself and its usage on the field of surround sound, further this work concerns aural transducers, especially electrodynamic one, which is used in this work, and the last topic is about baffle-board for loudspeakers. Hereinafter there are laid two proposals of baffles, one conception is closed baffle and second is bassreflex baffle. Both of those baffle conception are simulated in program LEAP-5 and are optimized for this current work. All construction possibilities introduced in this work are digestedly documented in appendix. Special attention is dedicated to right choice of aural transducer for this loudspeaker and to description of its attributes, there are discussed pro and cons of every chosen transducer and its suitability for this work. Electronic part of work is designing of amplifier and power source suitable for at least four of loudspeakers. Amplifier is modified for switching input level of signal between -10 dBu and +4 dBu, this range is reached by switching the amplification of amplifier. Amplifier is realized in class D, because of the demands on small the size of the system. Amplifier is powered by external source designated to be small and effective at the same time. Each module of power source and amplifier has their schemes and designs of printed circuit boards are documented in appendix.
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Wavefield Synthesis for Linear Loudspeaker Array
Panáček, Richard ; Balík, Miroslav (referee) ; Schimmel, Jiří (advisor)
This master thesis is meant to create a function for processing audio signals with Wavefield Synthesis for linear loudspeaker array. The text focuses on general issues of Wave Field Synthesis and practical design of 2.5D synthesis. It introduces Huygens’ principle followed by Rayleigh’s Theorem together with Rayleigh’s integrals. True design realizations are introduced based on theoretical procedures. The text states advantages and disadvantages of Wave Field Synthesis with linear loudspeaker array and also recounts solutions of some of the problems. The practical part of this thesis is devoted to designing two functions of Wave Field Synthesis inside the programming platform Matlab. The first function serves for processing signals from audio recordings and the second one for processing signals in real time. Proper functioning of procedures used in this thesis is then tested by a listening test.
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Wavefield Synthesis for Linear Loudspeaker Array
Panáček, Richard ; Balík, Miroslav (referee) ; Schimmel, Jiří (advisor)
This master thesis is meant to create a function for processing audio signals with Wavefield Synthesis for linear loudspeaker array. The text focuses on general issues of Wave Field Synthesis and practical design of 2.5D synthesis. It introduces Huygens’ principle followed by Rayleigh’s Theorem together with Rayleigh’s integrals. True design realizations are introduced based on theoretical procedures. The text states advantages and disadvantages of Wave Field Synthesis with linear loudspeaker array and also recounts solutions of some of the problems. The practical part of this thesis is devoted to designing two functions of Wave Field Synthesis inside the programming platform Matlab. The first function serves for processing signals from audio recordings and the second one for processing signals in real time. Proper functioning of procedures used in this thesis is then tested by a listening test.
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Loudspeaker Box for Wavefield Synthesis
Naňák, Pavel ; Kubánek, David (referee) ; Schimmel, Jiří (advisor)
Purpose of this work is to design active loudspeaker system as a source of sound proper for wavefield synthesis. Loudspeaker system is considerate as a singleband and its length should not overlap 15cm. System should be designed at the best in parameters like frequency characteristic and directional characteristic. Part of work is dedicated to theoretical aspects, explanation of wavefield principles itself and its usage on the field of surround sound, further this work concerns aural transducers, especially electrodynamic one, which is used in this work, and the last topic is about baffle-board for loudspeakers. Hereinafter there are laid two proposals of baffles, one conception is closed baffle and second is bassreflex baffle. Both of those baffle conception are simulated in program LEAP-5 and are optimized for this current work. All construction possibilities introduced in this work are digestedly documented in appendix. Special attention is dedicated to right choice of aural transducer for this loudspeaker and to description of its attributes, there are discussed pro and cons of every chosen transducer and its suitability for this work. Electronic part of work is designing of amplifier and power source suitable for at least four of loudspeakers. Amplifier is modified for switching input level of signal between -10 dBu and +4 dBu, this range is reached by switching the amplification of amplifier. Amplifier is realized in class D, because of the demands on small the size of the system. Amplifier is powered by external source designated to be small and effective at the same time. Each module of power source and amplifier has their schemes and designs of printed circuit boards are documented in appendix.
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