Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.
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![Page 1: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/1.jpg)
Traffic noises and its abatement
Baár-Madas Secondary School Budapest, Hungary
![Page 2: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/2.jpg)
Our aims are
to make noise maps to determine the noise load of interesting areas
to analyze the traffic noises more deeply to explore the psychical effects to give recommendation for “proper” noise
abatements
![Page 3: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/3.jpg)
Achieved investigations
Producing noise maps of significant areas of Budapest (till now Moszkva tér)
Spectral analysis of noises generated by the traffic
Test noise abatement materials in use
![Page 4: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/4.jpg)
Noise map of Moszkva tér
We gave a complex answer of a noise load of a major traffic junction measuring average, maximum and variance analyse the change in space and time explore the effects of environment
We plotted 2D noise maps
![Page 5: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/5.jpg)
Noise map of Moszkva tér
![Page 6: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/6.jpg)
The hot points (noise > 75 dB)
![Page 7: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/7.jpg)
Reduction effect of the environment
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The time evolution of the noise at a typical weekday
![Page 9: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/9.jpg)
Achieved investigations
Producing noise maps of significant areas of Budapest (till now Moszkva tér)
Spectral analysis of noises generated by the traffic
![Page 10: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/10.jpg)
Spectral analysis of noises Spectral analysis (Fourier transformation):
decomposes the noises to sum of sound waves with different frequencies (deep, middle and high voices)
Mathematically:
1
0
2sin2cosˆN
ikn N
kniNknff
the original functionthe Fourier-transformed
![Page 11: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/11.jpg)
Spectral analysis of noises
The spectrum of a tuning fork (“clear”)
The spectrum of a recorder (consists of peaks)
The spectrum of the noise of a car (“dirty”)
Different kind of spectrums:
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Spectral analysis of a car
frequency [Hz]
inte
nsity
car
![Page 13: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/13.jpg)
Spectral analysis of a car
frequency [Hz]
inte
nsity
deep voices components
car
![Page 14: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/14.jpg)
Spectral analysis of a car
frequency [Hz]
inte
nsity
middle voices components
car
![Page 15: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/15.jpg)
Spectral analysis of a car
frequency [Hz]
inte
nsity
high voices components
car
![Page 16: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/16.jpg)
Other spectrums
frequency [Hz]
inte
nsity
bus
higher intensity at low,
lower intensity at high freq. components
![Page 17: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/17.jpg)
Other spectrums
frequency [Hz]
inte
nsity
truck
very large deep components
![Page 18: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/18.jpg)
Achieved investigations
Producing noise maps of significant areas of Budapest (till now Moszkva tér)
Spectral analysis of noises generated by the traffic
Test noise abatement materials in use
![Page 19: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/19.jpg)
Testing noise abatement materials
We evaluated the effectiveness of some noise reduction materials in two different respects: the noise reduction capabilities the spectral characteristic of the reduction
We want to find the advantages, disadvantages and common problems
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Our test layout
![Page 21: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/21.jpg)
frequency [Hz]
inte
nsity
Spectral noise abatement of glass
without abatementwith abatement
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frequency [Hz]
inte
nsity
Spectral noise abatement of glass
effective reducing at high frequencies
poor reducing at low,
![Page 23: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/23.jpg)
wood glass
plastic foam glass in frame
![Page 24: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/24.jpg)
glass
glass in frame
`
The common problem:
Bad abatement capability at
low frequencies
The question:
What are the good materials?
How can we make them?
![Page 25: Traffic noises and its abatement Baár-Madas Secondary School Budapest, Hungary.](https://reader036.fdocuments.in/reader036/viewer/2022062401/5a4d1b5d7f8b9ab0599ab988/html5/thumbnails/25.jpg)
Planned investigations
Psychical effect of noises Define the characteristic features of “proper”
noise abatement Testing the noise reduction walls in use
noise attenuation capabilities spectral characteristic
Comparing the special national regulations in this field
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Participants
Hinsenkamp Anett Lipták György Mészáros Bence Papp Ádám Török Csaba
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Thank you
for your
kind attention!