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Evaluation and modelling of Traffic Noise
Černoch, Adam ; Spies, Karel (referee) ; Kudrna, Jan (advisor)
The task of the master's thesis is introduction with the problems of traffic noise, focusing on noise from road traffic. There is a description what is the noise, how it is formed, its resources and what are the methods of measuring. The following are the various noise reduction measures such as noise barriers and low noise pavements. The main attention is devoted to the noise generated at the tire / road that is reduced by these pavements. The practical part describes the implemented measurements on individual sections at various locations in our country. The measurement was carried by slightly modified method CPX with reference tire directly at the vehicle. The main aim was to evaluate the measurement data, make comparison of different low-noise surfaces with each other and with the commonly used surfaces. Then quantification of the rate reduction of the noise emission for a given section and verification of input data for noise modeling. In conclusion, the obtained results are summarized and based on them were confirmed very good acoustic properties with the recommendation to continue with measurements in the future.
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Anechoic Chamber Application
Lasota, Martin ; Janoušek, Michal (referee) ; Prokop, Aleš (advisor)
This bachelor's thesis presents evaluating of acoustic variables and anechoic chamber application. There are described physical requirements for the anechoic chambers. Part of this thesis deals with measurement of audio signals to calculation sound pressure level. The last part of this work includes audio signals of two microphone positions during the measurement sound source and finally their processing and evaluation.
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Evaluation and modelling of Traffic Noise
Černoch, Adam ; Spies, Karel (referee) ; Kudrna, Jan (advisor)
The task of the master's thesis is introduction with the problems of traffic noise, focusing on noise from road traffic. There is a description what is the noise, how it is formed, its resources and what are the methods of measuring. The following are the various noise reduction measures such as noise barriers and low noise pavements. The main attention is devoted to the noise generated at the tire / road that is reduced by these pavements. The practical part describes the implemented measurements on individual sections at various locations in our country. The measurement was carried by slightly modified method CPX with reference tire directly at the vehicle. The main aim was to evaluate the measurement data, make comparison of different low-noise surfaces with each other and with the commonly used surfaces. Then quantification of the rate reduction of the noise emission for a given section and verification of input data for noise modeling. In conclusion, the obtained results are summarized and based on them were confirmed very good acoustic properties with the recommendation to continue with measurements in the future.
|
|
|
Anechoic Chamber Application
Lasota, Martin ; Janoušek, Michal (referee) ; Prokop, Aleš (advisor)
This bachelor's thesis presents evaluating of acoustic variables and anechoic chamber application. There are described physical requirements for the anechoic chambers. Part of this thesis deals with measurement of audio signals to calculation sound pressure level. The last part of this work includes audio signals of two microphone positions during the measurement sound source and finally their processing and evaluation.
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