How to plan an Everyday Life with less Noise Pollution

In this master thesis a software, MapMonit, that use real measurement data as a basis to calculate noise maps was studied. The project focus on noise from roads. Simulations in MapMonit based on measurements were compared with control measurements and simulations of existing noise computation softwa...

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Main Authors: Desserud, Ingvald Festøy, Vaktdal, Stian Ruud
Format: Others
Language:English
Published: Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon 2008
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9777
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spelling ndltd-UPSALLA1-oai-DiVA.org-ntnu-97772013-01-08T13:26:38ZHow to plan an Everyday Life with less Noise PollutionengDesserud, Ingvald FestøyVaktdal, Stian RuudNorges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjonNorges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjonInstitutt for elektronikk og telekommunikasjon2008ntnudaimSIE6 elektronikkSignalbehandling og kommunikasjonIn this master thesis a software, MapMonit, that use real measurement data as a basis to calculate noise maps was studied. The project focus on noise from roads. Simulations in MapMonit based on measurements were compared with control measurements and simulations of existing noise computation software. The software used for comparison was CadnaA. The project started with measurements of road traffic noise with four microphone heights at four distances that would be used as input to the software called MapMonit. Since this was the first time the software ever got tested with real measurements, the first test site was chosen to be as simple as possible with a long, straight road and surrounding flat fields. The microphone distances from the road edge were 5 m, 10 m, 20 m and 100 m with microphone heights 0.4 m, 1.5 m, 2 m and 4 m at each of the distances. A grid of control microphones were positioned in the vicinity from 10 m to 180 m from the road edge. At distances 5 m to 20 m for microphone heights 1.5 m to 4 m, the results turned out to be very good. The difference between the A-weighted levels of MapMonit simulations and the control measurements was generally less than 1 dB for all control positions. Compared to CadnaA, the two simulated levels were very similar for propagation paths up to 100 m with differences below 1.4 dB. At control distances over 170 m, the difference was very high, up to 5.3 dB, with MapMonit simulating the highest values. A complicated test site in the vicinity of a noise screen were also studied. The reference microphones for input to MapMonit were placed in front, above and behind the screen, and one behind a garage also on the quiet side. The control measurements were placed around the neighborhood at the quiet side of the noise screen. Due to a flaw with the MapMonit software implementation, the results were presented with flat topography. The reference microphone in front of and above the noise screen gave satisfying results, with differences less than 2 dB at all control positions except for a position just behind a garage. Obstacles along the propagation path included both a noise screen and buildings. Choosing the microphone mounted just above the noise screen, the difference between the A-weighted levels of CadnaA and MapMonit was less than 1 dB for all positions except the one behind the garage. Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9777Local ntnudaim:4341application/pdfinfo:eu-repo/semantics/openAccess
collection NDLTD
language English
format Others
sources NDLTD
topic ntnudaim
SIE6 elektronikk
Signalbehandling og kommunikasjon
spellingShingle ntnudaim
SIE6 elektronikk
Signalbehandling og kommunikasjon
Desserud, Ingvald Festøy
Vaktdal, Stian Ruud
How to plan an Everyday Life with less Noise Pollution
description In this master thesis a software, MapMonit, that use real measurement data as a basis to calculate noise maps was studied. The project focus on noise from roads. Simulations in MapMonit based on measurements were compared with control measurements and simulations of existing noise computation software. The software used for comparison was CadnaA. The project started with measurements of road traffic noise with four microphone heights at four distances that would be used as input to the software called MapMonit. Since this was the first time the software ever got tested with real measurements, the first test site was chosen to be as simple as possible with a long, straight road and surrounding flat fields. The microphone distances from the road edge were 5 m, 10 m, 20 m and 100 m with microphone heights 0.4 m, 1.5 m, 2 m and 4 m at each of the distances. A grid of control microphones were positioned in the vicinity from 10 m to 180 m from the road edge. At distances 5 m to 20 m for microphone heights 1.5 m to 4 m, the results turned out to be very good. The difference between the A-weighted levels of MapMonit simulations and the control measurements was generally less than 1 dB for all control positions. Compared to CadnaA, the two simulated levels were very similar for propagation paths up to 100 m with differences below 1.4 dB. At control distances over 170 m, the difference was very high, up to 5.3 dB, with MapMonit simulating the highest values. A complicated test site in the vicinity of a noise screen were also studied. The reference microphones for input to MapMonit were placed in front, above and behind the screen, and one behind a garage also on the quiet side. The control measurements were placed around the neighborhood at the quiet side of the noise screen. Due to a flaw with the MapMonit software implementation, the results were presented with flat topography. The reference microphone in front of and above the noise screen gave satisfying results, with differences less than 2 dB at all control positions except for a position just behind a garage. Obstacles along the propagation path included both a noise screen and buildings. Choosing the microphone mounted just above the noise screen, the difference between the A-weighted levels of CadnaA and MapMonit was less than 1 dB for all positions except the one behind the garage.
author Desserud, Ingvald Festøy
Vaktdal, Stian Ruud
author_facet Desserud, Ingvald Festøy
Vaktdal, Stian Ruud
author_sort Desserud, Ingvald Festøy
title How to plan an Everyday Life with less Noise Pollution
title_short How to plan an Everyday Life with less Noise Pollution
title_full How to plan an Everyday Life with less Noise Pollution
title_fullStr How to plan an Everyday Life with less Noise Pollution
title_full_unstemmed How to plan an Everyday Life with less Noise Pollution
title_sort how to plan an everyday life with less noise pollution
publisher Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon
publishDate 2008
url http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9777
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