traffic noises: measuring and simulation baár-madas secondary school, budapest, hungary
TRANSCRIPT
Traffic noises:measuring and
simulationBaár-Madas Secondary School, Budapest, Hungary
General overview – we’ve already done…
Spectral analysis of noise generated by traffic Testing the noise abatement capabilities of
different materials
Making noise map (in space and time) of a major traffic junction
Find the noise-overload of this area
General overview – we’ve already done…
Spectral analysis of noise generated by traffic Testing the noise abatement capabilities of
different materials
Making noise map (in space and time) of a major traffic junction
Find the noise-overload of this area
Spectrum of a vehicle
frequency [Hz]
inte
nsity
bus
higher intensity at low,
lower intensity at high freq. components
Spectral noise abatement of a window
frequency [Hz]
inte
nsity
without abatementwith abatement
Spectral noise abatement of a window
frequency [Hz]
inte
nsity
effective reducing at high frequencies
poor reducing at low,
General overview – we’ve already done…
Spectral analysis of noise generated by traffic Testing the noise abatement capabilities of
different materials
Making noise map (in space and time) of a major traffic junction
Find the noise-overload of this area
Noise map of Moszkva-tér
Time evolution of the noise-intensityIde jön az animáció!
Our current investigations I Noise analysis of Ferihegy Terminal I
Measuring the noise load near Ferihegy Comparing the results to the national regulation
Computing the noise load generated by a plane Simulate the results Differences between the Noise Report of
Ferihegy and our measuring and simulation
Measuring the noise load near Ferihegy Comparing the results to the national regulation
Computing the noise load generated by a plane Simulate the results Differences between the Noise Report of
Ferihegy and our measuring and simulation
Our current investigations I Noise analysis of Ferihegy Terminal I
Ferihegy International Airport – Terminal I.
Problems with noise-limit regulations Measuring points
1 2
3
Problems with noise-limit regulations
Time average
Daytime limit6-22 h
projecting peaks!
Time average < Daytime limit
1. 2.
3.
Problems with noise-limit regulations
Projecting peaks
Time average < Daytime limit in line with the regulations
Measuring the noise load near Ferihegy Comparing the results to the national regulation
Computing the noise load generated by a plane Simulate the results Differences between the Noise Report of
Ferihegy and our measuring and simulation
Our current investigations I Noise analysis of Ferihegy Terminal I
Computing the noise load generated by a plane
zα: pressure attenuation constantz: measured noise level from distance mh: height of the planex: distance from the projection pointL: noise intensity in a given pointµ: linear absorption capacity of air
The final approach of a plain
Approach procedure to be followedDaytime
Nighttime
Results of the simulations
Gyuri progamja!
The noise map of the area of Ferihegy
Computing the decrease of the noise level
Simulate the results, making noise maps
Comparing the results to the national regulations
Our current investigations II Highway noise measuring
Noise map of a highway