Sound propagation in urban canyons: a case study of simulation reliability

Engedy, Anna Eszter; Lechleitner, Josef; Mahdavi, Ardeshir

doi:10.1080/19401493.2018.1528300

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…Por outro lado, Engedy et al (2018) indicam que a análise do cânion urbano como um átrio interno é improcedente, uma vez que as propriedades dos materiais das superfícies das edificações, os tipos e as frequências sonoras de fontes móveis como automóveis, presença de vento e vegetação são fatores de incertezas quanto ao ambiente acústico. Assim, muitos são os elementos que devem ser considerados na avaliação sonora em meios urbanos.…”

Section: Referencial Teóricounclassified

Avaliação acústica de um cânion urbano

Antonio dos Santos,

Rezende,

Barbosa

et al. 2023

Viii Simpósio Brasileiro De Qualidade Do Projeto No Ambiente Construído (Sbqp)

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O planejamento acústico de áreas urbanas, apesar de impactar significativamente a saúde da população, ainda não recebe atenção suficiente. As ruas-cânion trazem preocupações pois se trata de uma configuração morfológica em que a verticalização dos edifícios enfileirados ao longo de ambos os lados pode inibir o espraiamento dos raios sonoros. Assim, o objetivo deste trabalho é avaliar as condições acústicas de um cânion urbano. Medições in loco durante a semana e finais de semana, nos períodos da tarde e noite, foram realizadas e comparadas em duas ruas na cidade de Petrópolis - RJ: a rua-cânion 16 de Março e a larga rua do Imperador. Os resultados indicaram que nenhum dos pontos de medição apresentaram níveis de pressão sonora dentro dos limites indicados por normativa nacional, demonstrando que o nível de ruído no meio urbano em Petrópolis é excessivo. Na rua-cânion, embora prioritariamente para pedestre, a alta verticalização possivelmente resultou em múltiplas reflexões sonoras entre fachadas, limitando o espraiamento dos raios e contribuindo para o aumento dos níveis sonoros. Assim, apesar das distintas relações de altura e largura das ruas e das diferenças em relação à geometria das edificações, os usos e fluxos foram determinantes nas diferenças de ruído entre as ruas.

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Section: Referencial Teóricounclassified

Avaliação acústica de um cânion urbano

Antonio dos Santos,

Rezende,

Barbosa

et al. 2023

Viii Simpósio Brasileiro De Qualidade Do Projeto No Ambiente Construído (Sbqp)

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“…The results show that the works over the façade and overall, on the street paving, have a relevant impact on indoor noise propagation in buildings. For more references about the sound propagation in urban canyons, the reader is referred to [ 36 ], where several comparisons over simulated and measured SPLs on narrow urban canyons of the city of Vienna are described. The results show that the simulated and the measured values do generally agree, and that the developed simulator can be used for the planning of similar urban areas.…”

Section: Related Workmentioning

confidence: 99%

WASN-Based Day–Night Characterization of Urban Anomalous Noise Events in Narrow and Wide Streets

Álías

Socoró

Alsina-Pagès

2020

Sensors

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In addition to air pollution, environmental noise has become one of the major hazards for citizens, being Road Traffic Noise (RTN) as its main source in urban areas. Recently, low-cost Wireless Acoustic Sensor Networks (WASNs) have become an alternative to traditional strategic noise mapping in cities. In order to monitor RTN solely, WASN-based approaches should automatize the off-line removal of those events unrelated to regular road traffic (e.g., sirens, airplanes, trams, etc.). Within the LIFE DYNAMAP project, 15 urban Anomalous Noise Events (ANEs) were described through an expert-based recording campaign. However, that work only focused on the overall analysis of the events gathered during non-sequential diurnal periods. As a step forward to characterize the temporal and local particularities of urban ANEs in real acoustic environments, this work analyses their distribution between day (06:00–22:00) and night (22:00–06:00) in narrow (1 lane) and wide (more than 1 lane) streets. The study is developed on a manually-labelled 151-h acoustic database obtained from the 24-nodes WASN deployed across DYNAMAP’s Milan pilot area during a weekday and a weekend day. Results confirm the unbalanced nature of the problem (RTN represents 83.5% of the data), while identifying 26 ANE subcategories mainly derived from pedestrians, animals, transports and industry. Their presence depends more significantly on the time period than on the street type, as most events have been observed in the day-time during the weekday, despite being especially present in narrow streets. Moreover, although ANEs show quite similar median durations regardless of time and location in general terms, they usually present higher median signal-to-noise ratios at night, mainly on the weekend, which becomes especially relevant for the WASN-based computation of equivalent RTN levels.

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“…Nevertheless, such effectiveness is probably easier to demonstrate in the case of application with well-defined temporal, contextual, and operational boundary conditions. Well-known instances of highly useful simulation models pertain to domains such as thermal bridge analysis, lighting systems design, and room acoustics optimization (Mahdavi and Dervishi 2009;Engedy, Lechleitner, and Mahdavi 2019). Interestingly, in these instances -and in numerous comparable cases -simulation studies have often a snapshot character, meaning they focus on analysing the artefact at a specific temporal instance rather than providing long-term forecasts of artefacts' behaviour under dynamically changing internal and external boundary conditions.…”

Section: Does Simulation Matter?mentioning

confidence: 99%

In the matter of simulation and buildings: some critical reflections

Mahdavi

2019

Journal of Building Performance Simulation

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Is there firm evidence suggesting that the deployment of building performance simulation in the design process has actually a significant impact on buildings' subsequent long-term environmentally relevant performance? More importantly, do we have conclusive evidence for the frequently stated environmental mitigation potential of the building sector, given a number of essential global boundary conditions, including, for instance, population and urbanization growth? The pursuit of these questions could contribute to a more realistic appraisal of the environmentally relevant potential and limitations of both performance simulation deployment and sustainable building practices.

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Sound propagation in urban canyons: a case study of simulation reliability

Cited by 4 publications

References 16 publications

Avaliação acústica de um cânion urbano

Avaliação acústica de um cânion urbano

WASN-Based Day–Night Characterization of Urban Anomalous Noise Events in Narrow and Wide Streets

In the matter of simulation and buildings: some critical reflections

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