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Poluição sonora urbana: estudo de caso da subprefeitura de Pinheiros/SP / Urban noise pollution: a case study of the subprefecture of Pinheiros/SPShoegima, Thiago França 01 August 2011 (has links)
Esse trabalho apresenta uma análise de dados dos níveis de ruído referentes à Subprefeitura de Pinheiros/SP. Foram feitas medições em quarenta pontos, divididas em três fases que puderam ser comparadas com os limites estabelecidos pela lei de zoneamento. Nos processos de levantamentos de dados elaboramos mapas que serviram de suporte tanto em decisões como posteriormente na análise/comparação destes em relação aos limites sonoros estabelecidos. Na primeira fase observou-se uma grande quantidade de pontos com valores acima de 15 dB em relação aos limites estabelecidos. Nas fases seguintes houve uma diminuição, quando comparadas a primeira. Assim obtivemos um panorama dos níveis de ruído da área de estudo e sua situação em relação à lei de zoneamento urbano da cidade de São Paulo. / This paper presents an analysis of data concerning the noise levels referring to Pinheiros Subprefecture (in São Paulo city). Measurements made in forty spots, divided in three steps that could be compared with the limits established by zoning law. In procedures for survey data were prepared maps that served as pillar in decisions as well as later in analysis/comparison of these in relation to the noise limits established. In the first phase there were large numbers of points with values above 15 dB above the limits. In later stages there was an improvement compared with the measurements of the first phase. So we got a picture of the noise levels of the study area and its situation in relation to the urban zoning law of São Paulo city.
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Identifiering och kartläggning av buller i centrala Falun / Identification and mapping of noise pollution in central FalunSarhatlić, Nerim January 2014 (has links)
Ett problem i dagens moderna samhälle är att bullernivåerna är för höga. Dessa höga bullernivåer är en hälsorisk och kan ge människan permanenta skador. Buller är något som inte får försummas. Syftet med examensarbetet är att identifiera och kartlägga bullret på Holmgatan i centrala Falun. Syftet är också att analysera resultatet och sätta det i förhållande till myndigheternas krav och riktlinjer avseende bullernivåer. Examensarbetet avgränsas till bullermätning och kartläggning på delar av Holmgatan i centrala Falun, som bedömts vara extra utsatta för buller. Bullermätningarna utfördes under fyra vardagar och under tider från det att de flesta affärer öppnar till att de stänger, kl. 10-18. Metoden bestod utav bullermätningar som utfördes med en timmes intervall längs den utvalda delen av Holmgatan. Dagarna då dessa mätningar utfördes var 2/12 till 5/12-2013. Resultatet redovisas som medelvärdet per timme av alla dagar då bullermätningarna utfördes. Resultatet varierade, det lägsta bullermedelvärdet var 57 dB och det högsta bullermedelvärdet var 83 dB. Det syns tydligt att de högre värdena ligger närmare en gata som används av bussar och andra transportfordon. De lägre värdena låg oftast i närheten av Geislerka parken, som är en stor och öppen yta mitt i Holmgatan. Över lag så låg bullermedelvärdena mellan 60-65 dB. Slutsatsen tyder på att bullernivån på Holmgatan överskrider inte myndigheternas krav på vad som anses som skadligt men ligger strax under riktlinjerna för maximalnivån för utomhusbuller (70 dB). Åtgärder såsom att plantera vegitation på fasader och omleda trafiken skulle kunna vidtas för att minska bullernivån på Holmgatan. / A problem in today's modern society is that the noise levels are too high. These high levels of noise is a health hazard and can give man permanent damage. Noise pollution is something that must not be neglected. The purpose of this study is to identify and map the noise on Holmgatan in central Falun. The purpose is also to analyze the results and put them in relation with the regulatory requirements and guidelines regarding noise levels and to analyze the results and see if actions should be taken against the noise on Holmgatan. The thesis is limited to noise measurements and mapping of parts of Holmgatan, considered to be especially vulnerable to noise. Noise measurements were conducted during four weekdays and during times from when most stores open to most of them then closing, at. 10-18. The method consisted of noise measurements which were performed at hourly intervals along the selected portion of Holmgatan. The days on which these measurements were performed was from 2/12 to 5/12-2013. The results are reported as average value per hour of any day on which noise measurements were made. The results varied, the lowest average noise was 57 dB and the highest average noise was 83 dB. It is clearly seen that the higher values are closer to a street used by buses and other transport vehicles. The lower values were generally near Geislerka parken, which is a large garden, an open area in the middle of Holmgatan. Overall, the average noise values were between 60-65 dB. The conclusion suggests that the noise level at Holmgatan do not exceed regulatory requirements on what is considered as harmful but it is just below the guidelines for the maximum level of outdoor noise (70 dB). Actions such as planting vegetation on the facades and to redirect the traffic could be done to reduce noise levels at Holmgatan.
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Poluição sonora urbana: estudo de caso da subprefeitura de Pinheiros/SP / Urban noise pollution: a case study of the subprefecture of Pinheiros/SPThiago França Shoegima 01 August 2011 (has links)
Esse trabalho apresenta uma análise de dados dos níveis de ruído referentes à Subprefeitura de Pinheiros/SP. Foram feitas medições em quarenta pontos, divididas em três fases que puderam ser comparadas com os limites estabelecidos pela lei de zoneamento. Nos processos de levantamentos de dados elaboramos mapas que serviram de suporte tanto em decisões como posteriormente na análise/comparação destes em relação aos limites sonoros estabelecidos. Na primeira fase observou-se uma grande quantidade de pontos com valores acima de 15 dB em relação aos limites estabelecidos. Nas fases seguintes houve uma diminuição, quando comparadas a primeira. Assim obtivemos um panorama dos níveis de ruído da área de estudo e sua situação em relação à lei de zoneamento urbano da cidade de São Paulo. / This paper presents an analysis of data concerning the noise levels referring to Pinheiros Subprefecture (in São Paulo city). Measurements made in forty spots, divided in three steps that could be compared with the limits established by zoning law. In procedures for survey data were prepared maps that served as pillar in decisions as well as later in analysis/comparison of these in relation to the noise limits established. In the first phase there were large numbers of points with values above 15 dB above the limits. In later stages there was an improvement compared with the measurements of the first phase. So we got a picture of the noise levels of the study area and its situation in relation to the urban zoning law of São Paulo city.
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Lyssningsbara bullerutredningar : Auralisering av trafikbuller för bättre tolkning av ljudnivånCarlsen, Maria-Therese January 2021 (has links)
Syftet med detta examensarbete har varit att ta fram en metod för att skapa lyssninsbart trafikbuller med datorn, så kallat auraliserat trafikbuller, att koppla till en bullerkarta. I kartan skulle det gå att lyssna på hur trafikbullret skulle låta för att ge en bättre uppfattning om vad ljudnivån och färgskalan i en traditionell bullerkartläggning betyder. Bullerkartläggningar kan annars vara svåra att förstå då de enbart beskriver ljudnivån och inte typen av trafikbuller eller hur störande det är. Metoden behövde vara snabberäknad och lätt att använda för att vara ett lättillgängligt komplement till traditionella bullerkartläggningar. Auraliseringen baserades på ljudinspelningar av en motorväg, landsväg och en stadsgata, och som bakgrundsljud användes en lokalgata, fågelsång och ett förklarande samtal. Med Trafikverkets uppdelning av vägnätet i funktionella klasser delades vägarna in i vägtyperna motorväg, landsväg och stadsgata, och avståndet mellan fasadpunkterna och vägtyperna beräknades med programvaran ArcGIS Pro. Från en traditionell bullerkartläggning som beräknats i SoundPLAN erhölls ljudnivån vid fasadpunkterna. Genom att dämpa trafikbullret från de olika vägtyperna med atmosfärsdämpning, som främst dämpade de höga frekvenserna vilket gjorde att bullret uppfattades som mer avlägset, och med geometrisk spridning som dämpade den totala ljudnivån,kunde en ljudmix skapas för varje fasadpunkt. I många fall behövdes ljudet dämpas ytterligare eftersom dämpningen på grund av exempelvis andra hus och bullerskyddsskärmar inte hade inkluderats, och detta gjordes genom att sänka den totala ljudnivån till beräknade ljudnivån i bullerkartläggningen. I lugna områden där enbart lokalgator fanns i närområdet återspeglade ljudnivån trafikbullret från lokalgatorna, och trafikbullret från de större vägarna riskerades att överskattas och ge en missvisande trafikljudmix. Detta korrigerades genom att addera en avståndsberoende extradämpning som adderades till motorvägen, landsvägen och stadsgatan. Med en beräkningstid av 100 000 punkter på fem dagar är metoden tillräckligt snabb för att kunna användas vid bullerkartläggningar av även de största städerna i Sverige. Resultatet ger en uppfattning av hur det skulle låta på platsen, men låter inte exakt som i verkligheten. För att hålla komplexiteten nere beräknades auraliseringen med monoljud som sedan dubblerades till stereo. Den begränsas också av hur väl genomförd bullerkartläggningen är och inkluderar inte hur vädret påverkar trafikbullret. En noggrannare kalibrering av extradämpningen skulle behöva ske för att för en mer korrekt ljudmix i lugna bostadsområden. Metoden är anpassningsbar och fler trafikinspelningar går att addera till beräkningarna, väderparametrar kan justeras och med en anpassad bullerkartläggning går det att erhålla mer korrekta auraliseringar. / The aim of this project has been to develop a method for making audible traffic noise with the computer (auralization of traffic noise) to upload to a noise map. In the noise map, it would be possible to listen to how the traffic noise would sound like to give a better idea of what the sound level and color scale in a traditional noise survey means. Noise surveys can otherwise be difficult to understand as they only describe the noise level and not the type of traffic noise or how disturbing it would be. This method needed to be fast and easy to use to be an easily accessible complement to traditional noise maps. The auralization was based on sound recordings of a highway, country road and a city street, and as background sounds a local street, birdsong and an explanatory conversation were used. With the Swedish Transport Administration's classification of the road network into functional classes, the roads were divided into the road types motorway, country road and city street, and the distance between the facade points and road types was calculated with the ArcGIS Pro software. From a traditional noise map calculated in SoundPLAN, the sound level at the facade points was obtained.By attenuating the traffic noise from the different road types with atmospheric attenuation, which mainly attenuated the high frequencies and made the noise perceived as more remote, and with geometric scattering that attenuated the overall noise level, a sound mix could be created for each facade point. In many cases, the sound needed to be attenuated further because the attenuation due to, for example, other houses and noise protection screens had not been included, and this was done by lowering the total noise level to the calculated noise level of the noise mapping. In quiet areas where only local streets were in the close surrounding, the noise level reflected the traffic noise from the local streets, and the traffic noise from the major roads risked being overestimated and given a misleading traffic noise mix. This was corrected by adding a distance-dependent extra damping that was added to the motorway, country road and city street. With a calculation time of 100,000 points of five days, the method is fast enough to be used in noise mapping even in the largest cities in Sweden. The result gives an idea of how it would sound, but does not sound exactly like in reality. It is limited by how well the noise mapping is calculated and does not include how the weather affects traffic noise. A more accurate calibration of the extra damping would need to be calculated in order for a more accurate sound mix in quiet residential areas. The method is adaptable and more traffic recordings can be added to the calculations, weather parameters can be adjusted and with an adapted noise mapping it is possible to obtain more accurate auralizations.
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Adaptation and Stochasticity of Natural Complex SystemsDar, Roy David 01 May 2011 (has links)
The methods that fueled the microscale revolution (top-down design/fabrication, combined with application of forces large enough to overpower stochasticity) constitute an approach that will not scale down to nanoscale systems. In contrast, in nanotechnology, we strive to embrace nature’s quite different paradigms to create functional systems, such as self-assembly to create structures, exploiting stochasticity, rather than overwhelming it, in order to create deterministic, yet highly adaptable, behavior. Nature’s approach, through billions of years of evolutionary development, has achieved self-assembling, self-duplicating, self-healing, adaptive systems. Compared to microprocessors, nature’s approach has achieved eight orders of magnitude higher memory density and three orders of magnitude higher computing capacity while utilizing eight orders of magnitude less power. Perhaps the most complex of functions, homeostatis by a biological cell – i.e., the regulation of its internal environment to maintain stability and function – in a fluctuating and unpredictable environment, emerges from the interactions between perhaps 50M molecules of a few thousand different types. Many of these molecules (e.g. proteins, RNA) are produced in the stochastic processes of gene expression, and the resulting populations of these molecules are distributed across a range of values. So although homeostasis is maintained at the system (i.e. cell) level, there are considerable and unavoidable fluctuations at the component (protein, RNA) level. While on at least some level, we understand the variability in individual components, we have no understanding of how to integrate these fluctuating components together to achieve complex function at the system level. This thesis will explore the regulation and control of stochasticity in cells. In particular, the focus will be on (1) how genetic circuits use noise to generate more function in less space; (2) how stochastic and deterministic responses are co-regulated to enhance function at a system level; and (3) the development of high-throughput analytical techniques that enable a comprehensive view of the structure and distribution of noise on a whole organism level.
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Vliv dopravního hluku na zdraví exponované populace / The traffic noise influence on the health of the exposed populationDIVÁCKÝ, Jan January 2017 (has links)
This presented diploma thesis deals with evaluation of the traffic noise influence on the health of the exposed population. The objectives of this thesis are based on the results of Environmental Health System in the Czech Republic (Subsystem III), which provides the long-term monitoring of the noise in the municipal environment of the chosen agglomerations. A part of the noisy location monitoring is also the questionnaire survey confirming hypothesis n.1: "At the traffic noise perceiving, there is an important psychosocial bound, which often stands in opposition to the results of the noise measurements". Furthermore, the thesis describes the results of the indicative measurement of the chosen noisy localities in comparison with same locality measurements in the technical accuracy class. The indicative gauge tests were made on the traffic-busy roads in Jihlava city. The measurement has proved the link between the intensity of the traffic flow and indicatively determined noise levels and practical applicability for the local planning or local controlling incentives solution. The results of the indicative measurements point out to breaking of the equivalent night noise levels for sleep disturbance in three chosen localities. Breaking of the equivalent day noise levels has a nature of the noise annoyance. The measured road-traffic-caused night and day noise levels may be compared to the recommendations for the risks of increased incidence of selected civilization diseases published by the World Health Organisation.
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Mapeamento ac?stico como ferramenta para predi??o de ru?do urbano na ?rea de influ?ncia do est?dio Arena das Dunas, Natal/ RNPinto, D?bora Nogueira 25 July 2013 (has links)
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Previous issue date: 2013-07-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The Noise Pollution causes degradation in the quality of the environment and presents itself as one of the most common environmental problems in the big cities. An Urban environment present scenario and their complex acoustic study need to consider the contribution of various noise sources. Accordingly to computational models through mapping and prediction of acoustic scene become important, because they enable the realization of calculations, analyzes and reports, allowing the interpretation of satisfactory results. The study neighborhood is the neighborhood of Lagoa Nova, a central area of the city of Natal, which will undergo major changes in urban space due to urban mobility projects planned for the area around the stadium and the consequent changes of urban form and traffic. Thus, this study aims to evaluate the noise impact caused by road and morphological changes around the stadium Arena das Dunas in the neighborhood of Lagoa Nova, through on-site measurements and mapping using the computational model SoundPLAN year 2012 and the scenario evolution acoustic for the year 2017. For this analysis was the construction of the first acoustic mapping based on current diagnostic acoustic neighborhood, physical mapping, classified vehicle count and measurement of sound pressure level, and to build the prediction of noise were observed for the area study the modifications provided for traffic, urban form and mobility work. In this study, it is concluded that the sound pressure levels of the year in 2012 and 2017 extrapolate current legislation. For the prediction of noise were numerous changes in the acoustic scene, in which the works of urban mobility provided will improve traffic flow, thus reduce the sound pressure level where interventions are expected / A Polui??o Sonora provoca degrada??o na qualidade do meio ambiente e se apresenta como um dos mais frequentes problemas ambientais nas grandes cidades. Os ambientes urbanos possuem cen?rios ac?sticos complexos e seus estudos precisam considerar a contribui??o de fontes sonoras diversas. Nesse sentido, os modelos computacionais, por meio do mapeamento e predi??o do cen?rio ac?stico, se tornam importantes, uma vez que possibilitam a realiza??o de c?lculos, de an?lises e de relat?rios que permitem a interpreta??o de resultados satisfat?rios. O bairro de estudo ? o bairro de Lagoa Nova, ?rea central da cidade do Natal, o qual passar? por grandes mudan?as no espa?o urbano devido ?s obras de mobilidade urbana previstas para o entorno do est?dio Arena das Dunas em decorr?ncia da Copa de 2014 e as consequentes mudan?as da forma urbana e no tr?fego. Dessa forma, este trabalho objetiva avaliar o impacto sonoro provocado pelas altera??es vi?rias e morfol?gicas no entorno deste est?dio no bairro de Lagoa Nova em Natal, a partir de medi??es in loco e do mapeamento com a utiliza??o do modelo computacional SoundPLAN no ano 2012 e a evolu??o do cen?rio ac?stico para 2017. Para tal an?lise, realizou-se, primeiramente, a constru??o do mapeamento ac?stico atual com base no diagn?stico ac?stico do bairro, mapeamento f?sico, contagem classificada dos ve?culos e medi??o do n?vel de press?o sonora; e para se construir a predi??o de ru?do, observou-se, para a ?rea de estudo, as modifica??es previstas para o tr?fego, forma urbana e obras de mobilidade. Conclui-se que os n?veis de press?o sonora do ano 2012 e para 2017 extrapolam, em parte, a legisla??o vigente. Para a predi??o do ru?do foram verificadas v?rias modifica??es no cen?rio ac?stico, no qual as obras de mobilidade urbana previstas melhorar?o o fluxo do tr?fego, consequentemente, reduzir?o o n?vel de press?o sonora onde est?o previstas as interven??es
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The future noise mapping model in Sweden / Framtidens bullerkartläggningsmodell i SverigeSturk, Johanna January 2022 (has links)
An extensive technological shift is currently taking place to mitigate climate changeand this trend is particularly noticeable in the transport sector. This is interestingfrom an acoustical perspective, since it changes the noise environment in society.For example, a study in Gothenburg has shown that a complete electrification ofthe road traffic would reduce the noise levels by between 2 and 5 dB(A). In Sweden,noise emissions are calculated with a calculation model from 1996, called the Nordiskberäkningsmodell (Nordiska). Given the age of the model it is reasonable to investigate whether Sweden should change completely to the EU-common calculationmodel Common NOise aSSessment methOdS (CNOSSOS), since it is mandatory touse for national noise mapping. This master thesis has performed a computation analysis to compare and discussdifferences between CNOSSOS and Nordiska, to contribute to answering the question whether Sweden should change to CNOSSOS (or perhaps another model). Theresults show that CNOSSOS overall computes higher noise levels than Nordiska andthat the differences between them increase linearly with distance. Farthest from thenoise source the differences are up to 5 dB(A) for the road case and 9 dB(A) forthe railway case. In other words, the differences are larger for the railway trafficmodels than they are for the road traffic models, which is thought to be a result ofthe complexity of the CNOSSOS railway model. Another interesting phenomenonis that the differences behind buildings between the models are different for roadand railway traffic, which can be explained by the fact that the screening effects inNordiska’s road and railway models are different. My conclusion is that CNOSSOS is unsuitable for domestic calculations of noiseemissions. The model does not align with Swedish legislation and there is uncertaintydue to the fact that the differences between the CNOSSOS and Nordiska road andrailway models are different in size. Moreover, CNOSSOS railway model requires alot of computational power, which can delay and increase the costs of noise mappingor reduce the accuracy of the results. However, additional work is needed in whicheach calculation model is compared with measurements in situ to see which modelbest describes reality. If the conclusion thereafter is that CNOSSOS still is not asuitable option, it could be examined whether it is possible to create an updatedversion of Nord2000 (another Nordic calculation model used e.g. in Denmark) toobtain a calculation model that is more suitable for future traffic conditions. / För att minska effekterna av de pågående klimatförändringarna pågår idag ett omfattande teknikskifte för bland annat väg- och spårburen trafik. Detta skifte är intressant ur ett akustiskt perspektiv eftersom det förändrar bullermiljön i samhället.Till exempel har en studie i Göteborg visat att en full elektrifiering av vägtrafiken hade reducerat bullernivåerna med mellan 2 och 5 dB(A). Bullret beräknasmed en beräkningsmodell och i Sverige används idag Nordisk beräkningsmodell från1996 (Nordiska). Givet att modellen är gammal finns det god anledning att utredaom Sverige borde byta helt till den EU-gemensamma beräkningsmodellen CommonNOise aSSessment methOdS (CNOSSOS), som dessutom är obligatorisk vid dennationella bullerkartläggningen. Detta examensarbete har gått ut på att utföra en beräkningsanalys i syfte att jämföra och diskutera skillnader mellan CNOSSOS och Nordiska, vilket är ett steg i attbesvara frågan om Sverige borde byta till CNOSSOS (eller kanske någon annan beräkningsmodell). Resultaten visar att CNOSSOS överlag beräknar högre ljudnivåerän Nordiska och att skillnaderna dem emellan ökar linjärt med avståndet. Längstbort från bullerkällan uppgår skillnaderna som mest till 5 dB(A) för vägfallet och9 dB(A) för spårfallet. Skillnaderna är alltså större för spårmodellen än de för vägmodellen och det tros bero på komplexiteten i CNOSSOS spårmodell. Ett annatintressant fenomen är att skillnaderna bakom byggnader är olika stora för väg- ochspårtrafik, vilket förklaras med att skärmeffekten i Nordiskas väg- och spårmodellär olika. Min slutsats är att CNOSSOS inte är lämplig för inhemska beräkningar. Modellenkrockar med svensk lagstiftning samtidigt som det föreligger en osäkerhet i att skillnaderna mellan väg- och spårmodellerna är olika stora. Därutöver kräver CNOSSOSspårmodell mycket datorkraft, vilket kan fördyra och fördröja bullerutredningar ellerminska noggrannheten i beräkningsresultat. För att säkert besvara frågan anser jagdock att man behöver utföra ytterligare arbete där respektive beräkningsmodell jämförs med mätningar in situ för att se vilken modell som stämmer bäst överens medverkligheten. Kommer man därefter fram till att CNOSSOS inte är ett alternativbör man utreda om det är möjligt att skapa en uppdaterad version av Nord2000 (enannan nordisk beräkningsmodell som används bland annat i Danmark) i syfte att fåen beräkningsmodell som är bättre anpassad för framtida trafikförhållanden.
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Mapeamento e análise de ruído ambiental estudo de caso: Campus UnisinosKrumenauer, Marcelo 09 August 2016 (has links)
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Previous issue date: 2016-08-09 / UNISINOS - Universidade do Vale do Rio dos Sinos / Os mapas de ruído ou cartas acústicas são amplamente difundidos entre os países da União Europeia e são importantes ferramentas para elaboração de planos de ação e metas para combater a poluição sonora. No Brasil, contudo, poucas são as ações efetivas para a identificação e avaliação das condições de exposição da população ao ruído real. O conhecimento dos níveis reais de ruído permite ao poder público a análise e proposição de medidas e políticas públicas. Nos centros urbanos, cada vez mais a população sofre devido aos efeitos dos elevados níveis de ruídos, principalmente decorrentes do tráfego viário, degradando o meio ambiente e as condições de vida da população. O objetivo do trabalho é desenvolver o mapa de ruído para o Campus da Universidade do Vale do Rio dos Sinos. Para desenvolver este objetivo, foi utilizado o software de previsão acústica CadnaA, aplicando-se os seguintes procedimentos metodológicos: definição da área de estudo; estudo de tráfego da área avaliada (utilizando-se a contagem automática de veículos, através de controladores eletrônicos e cancelas automáticas do Campus); definição de grandezas (meteorológicas, acústicas, tráfego e geométricas); definição de parâmetros de cálculo; modelagem sonora; e validação do ambiente simulado. Para validação do mapa de ruído do Campus, foram avaliados 13 diferentes modelos, com diferentes configurações, comparando-os com os níveis equivalentes de pressão sonora coletados em campo. Os resultados finais indicam um modelo calibrado para a representação do ambiente sonoro do Campus, que com grande diversidade de ambientes de propagação, diferencia-se dos demais ambientes urbanos. Este trabalho justifica-se pelo avanço no reconhecimento e quantificação de níveis de ruídos em áreas externas. / The noise maps or acoustic cards are widely disseminated among of the European Union countries and are important tools for preparing action plans and targets to combat noise pollution. In Brazil, however, there are few effective actions for the identification and evaluation of the conditions of exposure of the population to the real noise. Knowledge of the actual levels of noise allows the government to analyze and propose measures and public policies. In urban centers, increasingly people are suffering from the effects of high noise levels, mainly resulting from road traffic, degrading the environment and living conditions of the population. The objective is to develop a noise map for the Campus of the Universidade do Vale do Rio dos Sinos. To develop this goal, the acoustic prediction software CadnaA was used, applying the following methodological procedures: definition of the study area; the evaluated area traffic study (using the automatic counting of vehicles through electronic controllers and automatic Campus gates); defining quantities (weather, acoustics, traffic and geometric); setting calculation parameters; sound modeling; and validation of the simulated environment. To validate the Campus noise map were evaluated 13 different models, with different settings, comparing them with the equivalent sound pressure level collected in the field. The final results indicate a calibrated model for the representation of the Campus environment sound, which with great diversity of propagation environments, differs from other urban environments. This work is justified by the progress in the recognition and measurement of noise levels outdoors.
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Srovnávací studie variant hodnocení hluku v urbánním prostředí / Comparative Study of Variants Evaluating Noise in Urban EnvironmentPomališová, Michaela January 2011 (has links)
Noise currently represents a problem in society, which disturbs mainly inhabitants in populated areas. It decreases their quality of life and endangers their health. The sensitivity to noise is individual, yet it is possible to measure noise by various means and evaluate its intensity and impact on human beings. Noise as a part of the environment, is becoming on the basis of resident complaints a discussed matter on the town and city level. Their management of noise necessarily involves monitoring and taking subsequent precautions. This work deals with comparing objective and subjective methods in noise evaluation in urban environments and its impact on the quality of life and the health of the residents. It uses a method of the multicriterial evaluation of variant also known as the multicriterial analysis. It compares four approaches to evaluate noise; two objective involving measuring, one subjective using a survey method and one hybrid. The winning method represents the subjective evaluation, which has fulfilled given criteria and acquired a significance of 75 %. All variants included in the analysis are suitable for noise evaluation in outdoor environments on a local level. The outcome of this work is to recommend towns and cities in the Czech Republic to use the winning compromising variant,...
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