|
|
Railroad vehicles noise issue
Rydlo, Andrej ; Řehák, Kamil (referee) ; Zubík, Martin (advisor)
This thesis includes research study of railway noise from the view of legislated restrictions and measurements. Different sources of noise are discussed in the beginning while the core of the work processes current noise limits and noise measurements. There is also provided a peek into road vehicles limits and measurements with comparison.
|
|
|
Noise diagnostics of rectifier diodes PN junctions
Klimíček, Jaromír ; Macků, Robert (referee) ; Raška, Michal (advisor)
The thesis deals with the design of the measurement installation, which is intended for the microplasma noise measurements. This noise is being generated in the defective parts of the PN junction. The goal of this work is to design the measurement installation and to realize the fully functional workbench for the analogical noise related measurements and to determine the transfer function of the measurement installation. Main part of the work is to choose proper parameters for the measuring devices and to design the software intended for the automated measurements. Consequently, we have to process the measured waveforms of the microplasma noise, to determine the dependency of the noise on the signal magnitude and to calculate the power spectral noise density. Finally, we have to determine the transfer function of the measurement installation and to design the inversion filter.
|
|
|
An overview of types of the sound generated when driving a passenger car
Činčár, Vojtěch ; Novotný, Pavel (referee) ; Vacula, Jiří (advisor)
Noise pollution is serious problem, which is particularly affecting our lives. The dominant source of this pollution is road traffic noise, which includes the noise of aerodynamic and mechanical origin. In this bachelor´s thesis, in addition to the main noise sources of both origins while driving a car, a brief overview of acoustic quantities is also presented. The main part of the bachelor´s thesis is dedicated to aerodynamic noise and individual types of mechanical noise, such as the noise of car powertrain. In the end, the overall characteristics of the noise generated by a passenger car while driving are given.
|
|
|
An overview of types of the sound generated when driving a passenger car
Činčár, Vojtěch ; Novotný, Pavel (referee) ; Vacula, Jiří (advisor)
Noise pollution is serious problem, which is particularly affecting our lives. The dominant source of this pollution is road traffic noise, which includes the noise of aerodynamic and mechanical origin. In this bachelor´s thesis, in addition to the main noise sources of both origins while driving a car, a brief overview of acoustic quantities is also presented. The main part of the bachelor´s thesis is dedicated to aerodynamic noise and individual types of mechanical noise, such as the noise of car powertrain. In the end, the overall characteristics of the noise generated by a passenger car while driving are given.
|
|
|
Railroad vehicles noise issue
Rydlo, Andrej ; Řehák, Kamil (referee) ; Zubík, Martin (advisor)
This thesis includes research study of railway noise from the view of legislated restrictions and measurements. Different sources of noise are discussed in the beginning while the core of the work processes current noise limits and noise measurements. There is also provided a peek into road vehicles limits and measurements with comparison.
|
|
|
Railroad vehicles noise issue
Rydlo, Andrej ; Řehák, Kamil (referee) ; Zubík, Martin (advisor)
This thesis includes research study of railway noise from the view of legislated restrictions and measurements. Different sources of noise are discussed in the beginning while the core of the work processes current noise limits and noise measurements. There is also provided a peek into road vehicles limits and measurements with comparison.
|
|
|
Noise diagnostics of rectifier diodes PN junctions
Klimíček, Jaromír ; Macků, Robert (referee) ; Raška, Michal (advisor)
The thesis deals with the design of the measurement installation, which is intended for the microplasma noise measurements. This noise is being generated in the defective parts of the PN junction. The goal of this work is to design the measurement installation and to realize the fully functional workbench for the analogical noise related measurements and to determine the transfer function of the measurement installation. Main part of the work is to choose proper parameters for the measuring devices and to design the software intended for the automated measurements. Consequently, we have to process the measured waveforms of the microplasma noise, to determine the dependency of the noise on the signal magnitude and to calculate the power spectral noise density. Finally, we have to determine the transfer function of the measurement installation and to design the inversion filter.
|
|
| |
guest ::
