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1
Content available Urban tidal flow noise - case study
Bąkowski Andrzej, Radziszewski Leszek
Vibrations in Physical Systems
|
2023
|
Vol. 34, nr 1
art. no. 2023119
EN
The study carried out an analysis of the urban traffic noise from 2011 to 2016 at Kielce (Poland). The results of noise simulations according to the Cnossos-EU model were compared with the sound level calculated by monitoring station and a very good agreement was obtained. The mean absolute error was smaller than 1 dB(A). For weekdays the charts shape at individual hours of the day were shown to be similar. However, one can notice a different shape of this charts from the morning peak on Friday to the end of the weekend and especially on Saturday and Sunday.
2
Content available remote Różnorodność krajobrazu dźwiękowego Parku Śląskiego
Miterska Magdalena, Kompała Janusz
Bezpieczeństwo Pracy : nauka i praktyka
|
2023
|
nr 2
20-24
PL
Park Śląski o powierzchni 535 hektarów znajduje się w centrum największej polskiej aglomeracji i stanowi miejsce wypoczynku mieszkańców pobliskich miast. Przeanalizowano krajobrazy dźwiękowe w różnych częściach parku: w Wesołym Miasteczku, zoo, skansenie, ogrodzie różanym, na Polach Marsowych oraz w okolicach planetarium. W wyniku badań wyodrębniono w parku strefy głośne i ciche. Wskazano na znaczenie odpowiedniego projektowania parków miejskich względem hałasu w ich otoczeniu. Ze względu na obszary o różnym przeznaczeniu i lokalizację parku jego poszczególne części różnią się krajobrazem dźwiękowym. W artykule przedstawiono charakterystykę krajobrazu dźwiękowego poszczególnych obszarów Parku Śląskiego.
EN
The 535-hectare Silesian Park is located in the centre of the largest conurbation in Poland and offers a recreation area to the inhabitants of nearby cities. Soundscapes in the following parts of the park were analysed: amusement park, zoo, ethnographic museum, rose garden, Field of Mars and the vicinity of the planetarium. Quiet and loud zones were identified as a result of the studies. The significance of appropriate urban park planning with regard to noise levels in the park environment was demonstrated. Due to the various purposes of the park areas and the park location itself, individual parts of the complex exhibit different soundscapes. The article presents the soundscape characteristics of individual areas of Silesia Park.
3
Content available Acquisition Module for a Wireless Acoustic Sensor Network Suitable for Argentinian Urban Environments
Caccia Matias, Sacerdoti Eduardo, Lombera Esteban
Journal of Ecological Engineering
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2022
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Vol. 23, nr 12
89--98
EN
Urban noise is a main component in the deterioration of life quality for people in urban areas. This problem mainly affects those who periodically travel through high traffic areas. The first step in reducing environmental noise is to characterize the urban setting with acoustic metrology for its diagnosis and control. This document exposes the design, construction and characterization of a wireless urban noise measurement module. The device works as a low-cost node with the capacity to be replicated for the deployment of a network of wireless acoustic sensors that allows the elaboration of dynamic urban noise maps. Each module consists of an electrical autonomy system, a single board computer and a MEMS microphone. The project also includes the design of a web portal to display measurement results in real time. The low-cost system was calibrated and compared with a class 1 sound level meter used to measure urban noise in the Autonomous City of Buenos Aires (CABA). Global differences of less than 1 dB were obtained. Urban noise was measured near the National University of Tres de Febrero following guidelines of ISO 1996-2 standard. The performance obtained in the evaluation instance and the results of the comparison were satisfactory.
4
Content available Soundscapes of Urban Parks in Cities with Populations of Over 100,000 in the Silesian Voivodeship
Miterska Magdalena, Kompała Janusz
Archives of Acoustics
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2021
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Vol. 46, No. 1
147--154
EN
The article presents the results of soundscape assessments conducted in urban parks in the Silesian Voivodeship. The Silesian Voivodeship is characterised by a high degree of industrialisation and the greatest population density in Poland. The studies were conducted in the urban parks of all the cities in the voivodeship with populations of over 100,000 citizens. This selection was determined based on acoustic maps that are prepared for cities with populations of over 100,000 citizens as required by law, and on the fact that the role of urban parks is frequently marginalised in the context of city life. The goal of the studies was to define an objective acoustic appeal assessment method for urban parks in city centres. Measurements were carried out in 34 parks located in the centres of 12 cities. A-weighted sound levels LAeq were determined for 107 measuring points in urban parks and the streets adjacent to them. Differences in the A-weighted sound levels LAeq were presented for each studied park and the adjacent streets. Minimum and maximum sound values were subsequently determined for each measuring point. Significant differences in the minimum and maximum sound values in given locations were found despite minor differences in LAeq values. It was also discovered that though parks may often exhibit high A-weighted sound levels LAeq, there are other factors that influence the appeal of park soundscapes.
5
Content available Urban traffic noise of heavy vehicles in octave bands
Bąkowski Andrzej, Dekýš Vladimir, Radziszewski Leszek, Świetlik Paweł
Vibrations in Physical Systems
|
2020
|
Vol. 31, nr 1
art. no. 2020103
EN
In this paper same results of heavy vehicles traffic measurements were used to simulate the noise measurands by the CNOSSOS-EU method for this purpose. The heavy vehicles traffic volume and velocity were recorded by permanent automatic monitoring station. The noise was calculated in octave bands according to the CNOSSOS-EU method. The positional and not positional measures of traffic noise were proposed for data scattering. The results was described using parameters such as the median, average peak noise, average maximum noise, average background level, first and third quartiles and relative measures of noise. Analyzes carried out for the tested section of the road showed that the traffic of heavy vehicles is not always the main source of road noise. It has been shown that maximum values of the acoustic pressure occur for the frequency of f0 = 500 Hz. The dispersion of noise and type A uncertainty of the results were evaluated.
6
Content available Wpływ zmiany organizacji ruchu na emisję hałasu w centrum miasta
Piątkowski P., Kraczkowski A.
Autobusy : technika, eksploatacja, systemy transportowe
|
2016
|
R. 17, nr 6
384--388
PL
W artykule przedstawiono wyniki pomiarów hałasu przeprowadzonych w centrum miasta Szczecinek. Pomiary wykonywane były w ramach realizacji europejskiego projektu transportowego CiViTAS Renaissance. Wyniki pomiarów posłużyły do opracowania dokumentów zawartych w Planie Rozwoju Zrównoważonego Transportu Miejskiego oraz Planie Ochrony przed Hałasem. Zakres badań emisji hałasu oraz natężenia ruchu dotyczył w szczególności centrum miasta, gdzie wystąpiła konieczność zlokalizowania najbardziej istotnych źródeł emisji hałasu. Pomiar hałasu oraz opracowanie map akustycznych dla miasta było jednym z elementów wdrażanych w latach 2009÷2012 zadań europejskiej inicjatywy CiViTAS. Na podstawie przeprowadzonych pomiarów oraz analizy wyników opracowano prognozę w zakresie zmian hałasu oraz natężenia ruchu w mieście.
EN
Paper discussed the impact of road traffic flow influence on noise emission. There were presented results of experimental research and computer analysis. These research were part of work connected with the CiViTAS Reneissance project. On the basis of the main conclusions, resulted from the research, there were made redevelopment works what significant influenced on change in traffic flow and structure in the city centre. The results of this work are conclusions for future steps needed to obtain more effective dropping of traffic noise emission.
7
Content available Urban Noise Annoyance Between 2001 and 2013 : Study in a Romanian City
Popescu D. I., Moholea I. F., Morariu-Gligor R. M.
Archives of Acoustics
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2013
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Vol. 38, No. 2
205--210
EN
The paper presents results of three socio-acoustic surveys conducted in an interval of twelve years, between 2001 and 2013, in a large Romanian city, Cluj-Napoca. The purpose of the surveys was to assess the awareness of residents on urban noise and the extent to which the noise environment affects their everyday life, behavior and health. The surveys were conducted in 2001, 2009 and 2013. The questionnaire used in the first survey had 16 questions and it was verified prior to study through a pilot survey, being corrected and improved. For the second and the third study, the questionnaire was enriched with eight more questions, regarding essentially the description of the residential area, criteria for its selection and also awareness about the noise map of the city. The analysis of responses defines the main characteristics of the local pattern of annoyance and reaction of the urban population to the environmental noise.
8
Content available Koncepcja wykorzystania metody wskaźnikowej dla potrzeb zrównoważonego rozwoju w kształtowaniu klimatu akustycznego miasta
Witała S.
Systemy Wspomagania w Inżynierii Produkcji
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2012
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z. 2 (2)
38--48
PL
Wyniki badań w zakresie wskaźników zrównoważonego rozwoju wskazują, iż ta dziedzina badań i analiz naukowych wymaga jeszcze poświecenia wielkiej uwagi, wielu analiz i studiów oraz pokonania problemów nie tylko natury metodologicznej, ale także praktycznej, związanej z ich zastosowaniem. Przesłanką tworzenia wskaźników zrównoważonego rozwoju jest operacjonalizacja tej koncepcji rozwoju na potrzeby nadzorowania realizacji wszelkiego typu dokumentów planistycznych takich jak: strategii, programów, polityk, tworzonych na poziomach lokalnym, regionalnym i krajowym poprzez zdefiniowanie dla każdego poziomu dobrze określonego zestawu mierników. Przegląd literatury wskazuje, że zrównoważony rozwój stanowi obiekt różnorodnych badań. Dla autora niniejszego artykułu interesujące jest podejście ku rozwojowi zrównoważonemu w kształtowaniu jakości klimatu akustycznego miasta. Temat wskaźników w dziedzinie kształtowania klimatu akustycznego miasta w kierunku zrównoważonego rozwoju, uwzględniając jednocześnie 3 wymiary: ekonomiczny, środowiskowy i społeczny, nie jest w pełni wyczerpany i wymaga poświęcenia większej uwagi i analizie. Hałas miejski można minimalizować, można z nim walczyć i nim zarządzać. Artykuł w punkcie 2. opisuje stan badań naukowych nad wskaźnikami zrównoważonego rozwoju. W punkcie 3. jest mowa o problemie jakości wskaźników, jego pojęciu i poprawności, zaś w kolejnym punkcie niniejszego artykułu podjęto próbę wyjaśnienia pojęcia zrównoważonego rozwoju właśnie w kształtowaniu klimatu akustycznego miasta. Punkt 5. przedstawia analizę wskaźników w układzie przyczynowo-skutkowym. Artykuł kończy krótkie podsumowanie.
9
Content available Analysis of the Grid Sampling Method for Noise Mapping
Gómez Escobar V., Barrigón Morillas J. M., Rey Gozalo G, Vilchez-Gómez R., Carmona del Rio J., Méndez Sierra J. A.
Archives of Acoustics
|
2012
|
Vol. 37, No. 4
499-514
EN
The grid method is the most widely used technique for measurement-based noise assessment, and indeed is part of the ISO 1996-2 standard. Nevertheless it has certain disadvantages. The present work is an analysis of the grid method for evaluating noise, firstly in the city of C´aceres and, secondly in two other smaller towns. Using as reference a 200 metre grid study, a study was made of the effect of varying the size and form of the grid on the city’s overall noise value, the percentage of data found to lie above some reference thresholds, and the noise value assigned to a certain zone of the city. The ISO 1996 recommendations of the necessity of new sampling points and the method’s predictive capacity for these new measurements were also analyzed.
10
Content available Monitoring the Reaction and Response of People to Urban Noise
Popescu D. I., Moholea I. F.
Archives of Acoustics
|
2010
|
Vol. 35, No. 2
237-244
EN
An important aspect in assessing noise in urban agglomerations is the subjective one, which takes into account the sensitivity and specific reactions of residents to the noise in their living environment. This paper presents results of a sociological study initiated to determine the population awareness, regarding the urban acoustic environment and estimation of effects and disturbance. The survey was conducted in a Romanian city, to complement the information provided by the strategic noise map of the area. This approach allows the estimation of specific local patterns of reaction and response to urban noise of the exposed population and provides the information, needed to develop action plans and to set proper solutions for urban area planning.
11
Content available remote Evaluation of transportation noise in urbanised areas. A case study
Calixto A., Pulsides C., Zannin P. H. T.
Archives of Acoustics
|
2008
|
Vol. 33, No. 2
185-199
EN
The paper describes a study of noise emission levels by roads inside an urban setting. For this purpose simultaneous measurements were performed: a) noise levels Leq, L10 and L90, b) vehicle flow and c) traffic composition. Vehicle flow and traffic composition have been used to estimate sound emission levels using mathematical models. Models were developed for two different situations, either as a function of a single variable (vehicle flow, VF), or as a function of two variables (VF and percentage of heavy vehicles, HV). Results of the prediction models agreed well with measured noise levels, especially for the model considering the two independent variables, VF and HV.
12
Content available remote Determining the noise impact on hearing using psychoacoustical noise dosimeter
Czyżewski A., Kotus J., Kostek B.
Archives of Acoustics
|
2007
|
Vol. 32, No. 2
215-229
EN
This research study presents the designed noise dosimeter based on psychoacoustical properties of the human hearing system and, at the same time, evaluation of time and frequency characteristics of noise. The designed noise dosimeter enables assessing temporary threshold shift (TTS) in critical bands in real time. In this way it is possible monitoring the hearing threshold shift continuously for people who stay in the harmful noise conditions. Moreover, the psychoacoustical noise dosimeter (PND) provides the functionality which determines time causing an increase of the assumed hearing threshold shift along with time required for recovery of a hearing threshold toward its initial value. Noise exposure levels, its duration along with hearing examination have been first measured in the acoustically controlled environment. Pure-tone audiometry has been used for hearing examination. This has been conducted in constant time intervals, during noise exposure as well as during resting time (time required for hearing recovery). The examination aims at measuring hearing threshold at 4 kHz. The important part of this study is validation of the dosimeter performance in the real noise exposure situation. In this case the whole noise measurement scenario encompasses both noise exposure effects, and hearing examination before and after noise exposure. The hearing examination has been extended by the distortion products otoacoustic emission method (DPOAE). The measurement results obtained in real conditions have been compared with those which were computed by means of the presented psychoacoustical noise dosimeter.
13
Content available remote Evaluation of performance of acoustic materials - a case study in Brazilian civil construction
Zannin P. H. T., Ferreira J.
Archives of Acoustics
|
2006
|
Vol. 31, No. 1
113-119
EN
Urban noises are emitted simultaneously by a wide variety of sources, such as, transportation and activities encountered in large cities. Many studies show that traffic noise followed by noise produced by neighbours are the main disturbing sources. Considering that both traffic and neighbour noise upset people inside their homes, it is possible to conclude that these homes do not display good performance of one of their purposes, which is the one of providing acoustic comfort. This fact is critical in Brazilian homes, as opposed to countries such as Germany and the USA, since these countries have specific rules for acoustic properties of materials used in civil construction, and Brazil does not. The goal of the present study is to show the acoustic performance of materials routinely used in Brazilian civil construction. Measurement procedures both in situ and in the laboratory are presented to determine acoustic performance of the materials, such as: insulation coefficient for air propagation. The results have shown that the acoustic performance of Brazilian constructions, are under international standard.
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