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Software sound level meter
Kotalík, Milan ; Říha, Kamil (referee) ; Sysel, Petr (advisor)
V této závěrečné práci se zaobírám problematikou měření hluků. Popisuji lidské vnímání zvuku a vysvětluji základní parametry a veličiny zvuku podle normy ČSN EN 61672-1. Dále se zaobírám problematikou měření zvukových veličin v reálném čase. Vytvářím ucelený soubor funkcí pro měření hladin zvuku v prostředí MATLAB, které se pokouším implementovat v jazyce C++ pomocí jeho JUCE framework.
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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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Sound level meter for embedded systems
Stejskal, Tomáš ; Schimmel, Jiří (referee) ; Botta, Miroslav (advisor)
The aim of this work is the design and implementation of a sound level meter for emdedded systems. It is designed sound level meter sensor. This sensor includes a microphone, microphone preamplifier and ADC. This sensor is connected to a development kit STM32F4 Discovery, where sound is processed. It is processed filtration, time weighting, calculation of sound leve and loudness weighting. The sound level is then sent via the serial communication USART. This thesis includes a theoretical analysis of noise and its human perceptions. It also describes the development platform used.
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Noise meter and sound detector
Jedlička, Petr ; Novák, Marek (referee) ; Povalač, Aleš (advisor)
This work deals with design and construction of a noise meter, which measures sound pressure level. The device can be set either for weighting filter A or for weighting filter C considering the characteristics of human hearing, the device also allows two modes, fast and slow, depending on the rate of changes of sound pressure level. It tis possible to send measured data to a PC through a measuring application. The noise meter can be powered either by three AA batteries or by a PC through USB interface. The noise meter can be controlled by voice commands.
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Rozbor negativních externalit silniční dopravy
KŮRKA, Pavel
The thesis is fucused on the study of negative externalities of road traffic. There are many externalities in the field of car transport. In this particular case, the emphasis is on externalities that have the greatest impact on human health. There are dust particles, noise and carbon dioxide production on a selected section of the transport route.I chose a very busy road in the village of Čkyně as the most suitable measuring section. This road i known as the ,, Čkyňská rovinka". Dust particles were meansured at the intersetiction in Prachatice because of the proximity of the measuring station. Measurements are made with the DUSTTRAK 8530, a universal sound level meter, a camera, a camcorder, a laptop and the MEFA 13 program, which comes from ATEM, s. r. o.
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Software sound level meter
Kotalík, Milan ; Říha, Kamil (referee) ; Sysel, Petr (advisor)
V této závěrečné práci se zaobírám problematikou měření hluků. Popisuji lidské vnímání zvuku a vysvětluji základní parametry a veličiny zvuku podle normy ČSN EN 61672-1. Dále se zaobírám problematikou měření zvukových veličin v reálném čase. Vytvářím ucelený soubor funkcí pro měření hladin zvuku v prostředí MATLAB, které se pokouším implementovat v jazyce C++ pomocí jeho JUCE framework.
|
|
|
Noise meter and sound detector
Jedlička, Petr ; Novák, Marek (referee) ; Povalač, Aleš (advisor)
This work deals with design and construction of a noise meter, which measures sound pressure level. The device can be set either for weighting filter A or for weighting filter C considering the characteristics of human hearing, the device also allows two modes, fast and slow, depending on the rate of changes of sound pressure level. It tis possible to send measured data to a PC through a measuring application. The noise meter can be powered either by three AA batteries or by a PC through USB interface. The noise meter can be controlled by voice commands.
|
|
|
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.
|
|
|
Sound level meter for embedded systems
Stejskal, Tomáš ; Schimmel, Jiří (referee) ; Botta, Miroslav (advisor)
The aim of this work is the design and implementation of a sound level meter for emdedded systems. It is designed sound level meter sensor. This sensor includes a microphone, microphone preamplifier and ADC. This sensor is connected to a development kit STM32F4 Discovery, where sound is processed. It is processed filtration, time weighting, calculation of sound leve and loudness weighting. The sound level is then sent via the serial communication USART. This thesis includes a theoretical analysis of noise and its human perceptions. It also describes the development platform used.
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