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Noise associated with the rail wheel
Mareš, Adam ; Řehák, Kamil (referee) ; Rec, Matouš (advisor)
The issue of noise associated with rail transport, focusing primarily on noise from the wheel – rail contact, is examined mainly in connection with rail transport, but also concerns tram transport in cities and, to a lesser extent, funicular railways. The noise of rail transport is one of the reasons why it is perceived negatively by the public, even though it offers many advantages over other modes of transport, such as environmental friendliness, travel comfort, travel speed and more. This is one of the reasons why it is necessary to focus on noise in rail transport and to understand, research and further develop and improve the whole issue as well, both in the area of passive and active noise control measures. For this reason, the aim of this work is to provide a comprehensive overview of the issue. The work therefore deals with the issue of noise in a comprehensive way, from the theoretical definition of noise, through noise sources and their distribution to noise measurement and the use of numerical methods for its evaluation and determination of appropriate preventive and anti-noise measures.
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Noise study of heat pump
Gregorovičová, Eva ; Hejčík, Jiří (referee) ; Jedelský, Jan (advisor)
The thesis deals with a noise study of a heat pump, which is important for the assessment of the acoustic comfort of people. The thesis describes the theory of basic terms, quantities, measuring devices and the chosen method of determining sound power. The acoustic properties and technical condition of the measured heat pump, its possible noise sources and the possibilities of reducing their emissions are also described. The total noise level of the device is determined by the intensity probe according to the scanning method according to ČSN ISO 9614-2. Based on the acoustic map and frequency spectrum, the partial noise sources of the heat pump are identified. The resulting values from the measurements are compared with the manufacturer's values. The noise situation is assessed by measuring and comparing the measured values with the hygienic limits. Furthermore, the designs of the noise protection measures are assessed, and the design of the noise protection measures for the specific case is carried out. Finally, possible noise protection measures are implemented and experimentally verified. The results confirm the need for further development of heat pumps to reduce noise emissions.
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Anti-noise Protective Agents in Tractors
Tulis, Jiří ; Ramík, Pavel (referee) ; Dundálek, Radim (advisor)
By the work deals with external and internal noise of tractor and its decline. It also contains an overview of modern anti-noise material (insulation), used in the automotive industry, especially in modern tractors to defusing the noise in the cabin and the stifling of noise acting in the environment. Finally, it included a specific study, which includes measuring external and internal noise on several tractors and evaluation.
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Noise in rail transport
Maňák, František ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This bachelor's thesis is about the noise of the rail transport, this thesis is focused on the noise, that is generated by trains on the track. This thesis includes analysis of dominant noise sources from rail transport, factors affecting noise and noise measures, which minimize noise from the rail transport as effectively as possible. These measures can be divided into active and passive, each measure has its own advantages and disadvantages. The conclusion describes an evaluation of current trends and considers the future possible development of noise measures.
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Noise study of heat pump
Gregorovičová, Eva ; Hejčík, Jiří (referee) ; Jedelský, Jan (advisor)
The thesis deals with a noise study of a heat pump, which is important for the assessment of the acoustic comfort of people. The thesis describes the theory of basic terms, quantities, measuring devices and the chosen method of determining sound power. The acoustic properties and technical condition of the measured heat pump, its possible noise sources and the possibilities of reducing their emissions are also described. The total noise level of the device is determined by the intensity probe according to the scanning method according to ČSN ISO 9614-2. Based on the acoustic map and frequency spectrum, the partial noise sources of the heat pump are identified. The resulting values from the measurements are compared with the manufacturer's values. The noise situation is assessed by measuring and comparing the measured values with the hygienic limits. Furthermore, the designs of the noise protection measures are assessed, and the design of the noise protection measures for the specific case is carried out. Finally, possible noise protection measures are implemented and experimentally verified. The results confirm the need for further development of heat pumps to reduce noise emissions.
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Noise associated with the rail wheel
Mareš, Adam ; Řehák, Kamil (referee) ; Rec, Matouš (advisor)
The issue of noise associated with rail transport, focusing primarily on noise from the wheel – rail contact, is examined mainly in connection with rail transport, but also concerns tram transport in cities and, to a lesser extent, funicular railways. The noise of rail transport is one of the reasons why it is perceived negatively by the public, even though it offers many advantages over other modes of transport, such as environmental friendliness, travel comfort, travel speed and more. This is one of the reasons why it is necessary to focus on noise in rail transport and to understand, research and further develop and improve the whole issue as well, both in the area of passive and active noise control measures. For this reason, the aim of this work is to provide a comprehensive overview of the issue. The work therefore deals with the issue of noise in a comprehensive way, from the theoretical definition of noise, through noise sources and their distribution to noise measurement and the use of numerical methods for its evaluation and determination of appropriate preventive and anti-noise measures.
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|
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Noise in rail transport
Maňák, František ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This bachelor's thesis is about the noise of the rail transport, this thesis is focused on the noise, that is generated by trains on the track. This thesis includes analysis of dominant noise sources from rail transport, factors affecting noise and noise measures, which minimize noise from the rail transport as effectively as possible. These measures can be divided into active and passive, each measure has its own advantages and disadvantages. The conclusion describes an evaluation of current trends and considers the future possible development of noise measures.
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|
|
Anti-noise Protective Agents in Tractors
Tulis, Jiří ; Ramík, Pavel (referee) ; Dundálek, Radim (advisor)
By the work deals with external and internal noise of tractor and its decline. It also contains an overview of modern anti-noise material (insulation), used in the automotive industry, especially in modern tractors to defusing the noise in the cabin and the stifling of noise acting in the environment. Finally, it included a specific study, which includes measuring external and internal noise on several tractors and evaluation.
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The noise analysis of selected school objects the South University
NAVRKALOVÁ, Renáta
This thesis contains the noise analysis of inside selected objects the South University depend on environment, type of transport routes a vehicles, which moved on this routes. It concerns for example cars, trucks, busses and motorcycles. Based on measured values, there is a summary the results of noise in the individual measuring places. Afterwards, there are suggested ways of appropriate noise reduction, but in this cases only if it?s necessary. The object of this work is the pointing out potential excessive noise suggesting some possibilities of its removal at the measured places.
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Analysis of transport noise device on the transport environment.
KDOLSKÝ, Tomáš
This thesis contains the noise analysis of transport vehicles as cars, trucks, cargo sets, busses and motorcycles in relation of the kind of the transport environment, but also on the character of the transport routes. There are very important factors here and namely the kind of passing vehicles, the number of passing vehicles, the speed of the vehicles, weather conditions, road surface and road condition. Following to this analysis there is a summary of the results detected, which is mainly focused on the level of noise emissions in the individual measuring places. Afterwards, there are suggested ways of appropriate noise reduction. The object of this work is the pointing out potential excessive noise suggesting some possibilities of its removal at the measured places.
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