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Legislative Regulations for Vehicle Exterior Noise
Koštuřík, Vojtěch ; Prokop, Aleš (referee) ; Janoušek, Michal (advisor)
This bachelor´s thesis deals with an overview of legislative regulations for vehicle exterior noise. Introduction is dedicated to acoustics and basic acoustic variables. Next, there are mentioned sources of external noise of vehicles and distribution vehicles by category. The following provides an overview of standards and legislative documents dealing with external noise of motor vehicles. These standards and documents also establish a methodology for measuring external noise, referred to in the following chapter. In the end, there is an assessment of development of legislation in the field of external noise.
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Software for Processing of Sound Level Meter Data
Kříž, Petr ; Schimmel, Jiří (referee) ; Kurc, David (advisor)
This thesis deals with the measurement and evaluation of noise. Thesis summarizes the basic concepts of acoustics and describes methods of measurement and evaluation of noise, focusing on measurement uncertainty. Part of this work is the implementation of software for processing of sound level meter data NTi XL2 in Matlab including practical examples of its use.
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Noise Analysis of Audio Signals
Kabarová, Anísa ; Mach, Václav (referee) ; Schimmel, Jiří (advisor)
The theoretical part of this work deals with the basics of acoustics, noise measurement and statistical noise level analysis. The application part focuses on the implementation of the frequency and time weighting according to the technical standard IEC 61672 and the statistical noise level analysis in MATLAB programming environment. Finally the reliability of the application is tested on real data and the results are compared to those measured by a digital Sound Level Meter.
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Spectral analyse of sound in space acoustics
Port, Martin ; Bereznanin, Martin (referee) ; Rozman, Jiří (advisor)
This thesis is an introduction to the problems of acoustics and is focused on the variables describing the noise. The methodology for measuring noise in relation with valid hygiene standards is analyzed in next section. The noise levels at work required by government regulation no. 148/2006 are summarized in a subsequent charter. The next section is an introduction to the analyzer PULSE 3560B from Brüel & Kjar. This work describes a software called Labshop, which is designed to analyze noise and vibrations. It also describes the most common features Acoustilyzer NTI AL1. The practical part was to measure the reverberation, noise, frequency spectrum and plott the distribution of noise with noise maps of various auditoriums.
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Automation of Noise Measurements Using XL2 Sounl Level Meter
Švihálek, Filip ; Číž, Radim (referee) ; Schimmel, Jiří (advisor)
This bachelor´s thesis focuses on noise measurement, characterizes used quantities and uncertainties due to the measument of these quantities. The goal is to develop application, which will automate measurement with sound level meter XL2. Automation will use text output of the XL2 and modul for Remote Measurement. Application is developed in development environment Visual Basic for Applications.
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Loudness Index Measuring
Hloušek, Pavel ; Mach, Václav (referee) ; Kurc, David (advisor)
This thesis deals with noise measuring. There are described methods of measurement and evaluation of noise, focusing on Steven’s loudness calculation method. Basic concepts of acoustics are provided in the first part. There are also mentions measurement of noise using microphones and sound level meter. The second part is focused on the practical solution of thesis. In which it is made measurement of noise using sound level meter NTi Acoustilizer and implementation of the graphical user interface for calculation of the Steven’s loudness index in Matlab.
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Evaluation of pavement surface noise reductions
Mejzlík, Martin ; Spies, Karel (referee) ; Kudrna, Jan (advisor)
The aim of the bachelor´s thesis is to make an introduction to quiet pavements, analyzing the sources of tire/pavement noise, study the principles of this pavement and summarize their properties. This thesis deals with method of measurement tire/pavement noise and evaluate the concrete measurements. The main aim of the thesis is to evaluate measurement in Zádveřice near Zlín.
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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.
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The noise map in GIS
Rodryč, Filip ; Čech, Petr (referee) ; Čížek, Martin (advisor)
This work consist theoretical basis and practical examination of system ArcView. There are analyzing quantity, which describing noise and in brief acquaint with methodology of noise measuring. Contains limits of noise in working environment laid directions government’s no. 148/2006. Further that mull over method of noise measuring in working environment. There is described Geographic Information System and his parts. This work mull over architecture of software ArcView and his superstructures, which measure up process of geographical data and analyze data nearly connected with region of life environment. There are described measuring instruments Acoustylizer NTI AL1 and PULSE 3560B, which are intended for measuring and analyzing of noise. In the end there are introduced results of measurement and noise maps for given situation.
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