scholarly journals Assessments and Control of Anthropogenic Noise Pollution in Students’ Residential Areas in Ogbomoso

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
A. O. Ajayeoba
Keyword(s):  
Medical History ◽  
Undergraduate Students ◽  
Circuit Breaker ◽  
Noise Pollution ◽  
Sound Level ◽  
Anthropogenic Sources ◽  
Anthropogenic Noise ◽  
Residential Areas ◽  
Sound System ◽  
And Control

Increased rate of noise-associated risk factors such as speech interference and reduction in productivity, necessitated that control and regulation measures be put in place, to contain anthropogenic noise pollution in the students’ hostels. Therefore, this study assessed the various anthropogenic sources of noise pollution in students’ hostels and developed a Sound Level Monitor and Control (SLMC) device. 1250 undergraduate students across 5 students’ residential zones were sampled for demographics and investigations were conducted into respondents’ perceived medical history, identification of noise sources, and evaluation of hearing loss. Effects of noise levels were evaluated using 100 respondents’ rooms per zone following standard procedures, considering Sound-System-Only (SSO), Generators-Only (GO), and combination of Sound-System-and-Generator (SSG), loud-conversations, etc., as sources of noise. However, a noise control device incorporated with a circuit breaker was developed. The respondents were 51.2% male and 48.8% female, with 58% in the age range 18 – 27 years. The medical history showed that 1.2 and 6.4% had a hearing problem in short and long times, respectively, while 43.6% affirmed that SSO was a major noise pollution causal factor. SSO, GO, loud conversations, traffic, and grinding machines were identified as the prominent sources of anthropogenic induced noise. The minimum average SL result gave a value of 62.8400dB for both ventilated and unventilated rooms, which is 14% above 55dB threshold value recommended by the National Environmental Standards and Regulations Enforcement Agency. The developed SLMC device gave notification at the SL above 55dB for 15 seconds before disconnecting the sound system if not regulated.

Testing of Sonic-Absorbent Panels’ Behavior in Open-Air Environment

2012 ◽  
Author(s):  
Petru A. Pop ◽  
Patricia A. Ungur ◽  
Liviu Lazar ◽  
Mircea Gordan ◽  
Florin M. Marcu
Keyword(s):  
High Frequency ◽  
Noise Pollution ◽  
Sound Level ◽  
Sound Level Meter ◽  
Data Logger ◽  
Public Buildings ◽  
Gypsum Plaster ◽  
Level Meter ◽  
And Control

One wildly used method to reduce and control the noise pollution in green city’s buildings is using sonic-absorbent panels. Their applications can be multiple, such as the insulation of buildings, acoustic barriers and fences along the highway or in front of supermarkets, hospitals and other public buildings. This paper presents a method for testing the behavior of sonic-absorbent panels in open-air environment. The work represents a carrying on of previous research about absorbent materials from gypsum family, tested in lab conditions. The experiment setup used a dynamic installation and as a sample a stand formed by six sonic-absorbent panels from special modeling alpha-gypsum plaster. This installation has been composed of two loudspeakers for emitting the sound at a well-defined frequency by the first laptop, the microphone for detecting and transmitting the signal to the second laptop for analyzing and processing the data. All operations were performed using MATLAB Programs, while a Data Logger Sound Level Meter type CENTER 332 was put on near the microphone to compare both results. The first experiment of acoustic stand has been realized by setting up the installation at a frequency from 50 Hz to 1250 Hz and altering the distance between loudspeakers and stand at 0.5m to 1m and 1.5m, respectively. The second experiment kept the same test’s conditions, while two and three layers of sonic-absorbent panels formed the stand, respectively, but at same distance from source of 0.5 m. In both tests, the results underlined the good sonic-absorbent properties of these panels, especially at medium and high frequency, which can recommend using the panels for multiple outside applications.

scholarly journals Traffic Noise Assessment at Residential Areas in Skudai, Johor

2018 ◽  
Vol 34 ◽  
pp. 02024
Author(s):  
F.S. Sulaiman ◽  
N. Darus ◽  
N. Mashros ◽  
Z. Haron ◽  
K. Yahya
Keyword(s):  
Noise Level ◽  
Traffic Noise ◽  
Noise Pollution ◽  
Traffic Volume ◽  
Sound Level ◽  
Pollution Level ◽  
Vehicle Speed ◽  
Residential Areas ◽  
Traffic Characteristics ◽  
Noise Assessment

Vehicles passing by on roadways in residential areas may produce unpleasant traffic noise that affects the residents. This paper presents the traffic noise assessment of three selected residential areas located in Skudai, Johor. The objectives of this study are to evaluate traffic characteristics at selected residential areas, determine related noise indices, and assess impact of traffic noise. Traffic characteristics such as daily traffic volume and vehicle speed were evaluated using automatic traffic counter (ATC). Meanwhile, noise indices like equivalent continuous sound pressure level (LAeq), noise level exceeded 10% (L10) and 90% (L90) of measurement time were determined using sound level meter (SLM). Besides that, traffic noise index (TNI) and noise pollution level (LNP) were calculated based on the measured noise indices. The results showed an increase in noise level of 60 to 70 dBA maximum due to increase in traffic volume. There was also a significant change in noise level of more than 70 dBA even though average vehicle speed did not vary significantly. Nevertheless, LAeq, TNI, and LNP values for all sites during daytime were lower than the maximum recommended levels. Thus, residents in the three studied areas were not affected in terms of quality of life and health.

scholarly journals Spatio-Temporal Modelling of Noise Pollution

2021 ◽  
Vol 13 (3) ◽  
Author(s):  
Nur Nazmi Liyana Mohd Napi ◽  
◽  
Mohd Hafizul Zainal ◽  
Samsuri Abdullah ◽  
Nazri Che Dom ◽  
...  
Keyword(s):  
Primary School ◽  
Noise Level ◽  
Primary Schools ◽  
Noise Pollution ◽  
Environmental Noise ◽  
Sound Level ◽  
Mitigation Measures ◽  
P Value ◽  
Residential Areas ◽  
School Students

An undesired or hazardous outdoor sound produced by human activities is referred to as environmental noise. For example, the noise emitted through industrial activities and transportation networks such as road, rail and air traffic. In Malaysia, most of the schools located very close to the roadside and near busy places such as cities, shops, and residential areas. This study aims to analyze the environmental noise in terms of spatial and temporal analysis in two primary schools in Terengganu State. The noise monitoring had conducted in two (2) primary schools with different land use; residential area (Batu Rakit Primary School) and commercial area (Paya Bunga Primary School) on the school and non-school days by using Sound Level Meter (SLM). The spatial mapping had constructed by using SketchUp® 2018 and Surfer® version 11 software. The noise level between both study areas was significantly different based on a p-value of less than 0.05. It also surpassed the Department of Environment (DOE) of Malaysia's permitted limit, with the Equivalent Noise Level (LAeq) in residential areas being greater than in commercial areas due to traffic volume and noise from nearby activities. Lastly, the area near the roadside has higher critical noise pollution compared with the location that furthers from the roadside. In conclusion, this study is useful in creating awareness to the public about the noise pollution effect on primary school students and is also can be used for mitigation measures to have a better place for students to study.

scholarly journals How Wildlife Respond to Natural Noise

2021 ◽  
Author(s):  
Dylan G.E. Gomes
Keyword(s):  
Sound Level ◽  
Anthropogenic Sources ◽  
Anthropogenic Noise ◽  
Frequency Noise ◽  
Spider Webs ◽  
Predator Prey ◽  
Sound Levels ◽  
Natural Noise ◽  
Acoustic Environments ◽  
High Sound

Animal sensory systems have evolved in a natural din of noise since the evolution of sensory organs. Anthropogenic noise is a recent addition to the environment, which has had demonstrable, largely negative, effects on wildlife. Yet, we know relatively little about how animals respond to natural sources of noise, which can differ substantially in acoustic characteristics from human-caused noise. Here we review the noise literature and suggest an evolutionary approach for framing the study of novel, anthropogenic sources of noise. We also push for a more quantitative approach to acoustic ecology research. To build a better foundation around the effects of natural noise on wildlife, we experimentally and continuously broadcast whitewater river noise across a landscape for three summers. Additionally, we use spectrally-altered river noise to explicitly test the effects of masking as a mechanism driving patterns. We then monitored bird, bat, and arthropod abundance and activity and assessed predator-prey relationships with bird and bat foraging assays and by counting prey in spider webs. Birds and bats largely avoided high sound levels in noisy environments. Bats also avoided acoustic environments dominated by high frequency noise while birds avoided noise that overlapped with their song, the latter trend suggesting that communication is impaired. Yet, when sound levels were high overlapping noise was not any more disruptive than non-overlapping noise, which suggests that intense noise interferes with more than communication. Avoidance of noise that overlapped in frequency with song was stronger for low-frequency singers. Bats that employ higher frequency echolocation were more likely to avoid high sound level noise; we explore potential explanations for this pattern. Most arthropod Orders responded to noise, yet the directions of effects were not consistent across taxa. Some arthropods increased in abundance in high sound level areas - perhaps in response to the absence of bird and bat predators. Reinforcing this possibility, visually foraging birds and passively listening bats decreased foraging effort beyond what was expected based on declines in abundance and activity. Orb-weaving spiders increased dramatically in high sound level areas, which could be due to a release from predation, an increase in prey capture, or direct attraction to high sound level river noise. Overall, we demonstrated significant changes to many vertebrate and invertebrate taxa during playback of whitewater river noise. We were able to parse out the effects of sound pressure level and background frequency on these individual taxa and predator-prey behaviors. Our results reveal that animals have likely long been affected by particular characteristics of noise, which may help explain contemporary responses to anthropogenic noise. As the spatial and temporal footprint of anthropogenic noise is orders of magnitude greater than intense natural acoustic environments, the insights provided by our data increase the importance of mitigating noise pollution impacts on animals and their habitats. It is clear that natural noise has the power to alter animal abundances and behavior in a way that likely reverberates through entire communities and food webs. Future work should focus on strengthening the relationships between these potential predators and prey and highlight how the structure of the system changes under such noise treatments.

scholarly journals Assessment of Environmental Noise Pollution in Warri and Effurun Metropolitan Cities

2018 ◽  
Vol 13 (3) ◽  
pp. 434-445
Author(s):  
GODWIN JOHUEL BIRMA ◽  
E. E. UKPEBOR ◽  
B. R. ISSA
Keyword(s):  
Noise Pollution ◽  
Environmental Noise ◽  
Sound Level ◽  
World Health ◽  
Sampling Station ◽  
Residential Areas ◽  
Noise Levels ◽  
Metropolitan Cities ◽  
The Mean ◽  
Health Organization

Environmental noise pollution affects not only the quality of life, but it poses a serious health and social problem. The Cirrus integrating averaging sound level instrument: model CR262A was employed to determine the noise levels at the twenty-two (22) selected sampling stations. The measurement of the noise was carried out during the morning, afternoon, and evening periods, to evaluate noise pollution within the twin city.Results indicated that there is no much difference (p>0.05) in the mean noise values within the different periods of the day at each sampling station, but there is significant variation (p<0.05) in the mean noise values at each period of the day over all the sampling stations. The results of the noise measurement showed that Enerhen Junction and NNPC Complex recorded the highest and lowest overall noise values of 84.84+5.39 dB(A) and 70 .90+2.98 dB(A) respectively. The results of this survey showed that the noise values at all the measurements points within Warri and Effurun metropolitan cities and at all the periods of the day is more than the Nigeria Federal Ministry of Environment (NFMEnv) and World Health Organization (WHO) permissible limit of 55dB daily noise level criteria for residential areas. The ssurvey requires the need to enact and enforce permissible noise levels/standards for residential neighbourhoods of 55dB by relevant environmental authorities both at Federal and state levels instead of applying 90dB standard meant for regulations in industrial settings.

scholarly journals Noise Pollution Monitoring at Some Indoor Environments in Basrah City, Iraq

2022 ◽  
Vol 6 (1) ◽  
pp. 24-34
Author(s):  
Inaam Qzae
Keyword(s):  
Noise Pollution ◽  
Sound Level ◽  
Pollution Monitoring ◽  
Educational Institutions ◽  
Living Room ◽  
Indoor Environments ◽  
Residential Areas ◽  
Sound Levels ◽  
Educational Institute ◽  
Study Results

Noise is an unavoidable stressor nowadays; it adversely affects human health and the ability to perform mental and complex tasks. Eight selected points representing home environment were sampled in urban zones, the indoor and outdoor noise levels in these residential areas were evaluated during the summer and winter seasons. Also, nine points in educational institute represented by the College of Science through its lecture halls, laboratories and corridors, to compare them with WHO limits of sound pressure levels, to assess the level of noise experienced by people in indoor closed environments. The current study results showed higher sound levels than required inside homes and educational places. For homes, the highest sound level was 73.9 dB during summer in the living room and the lowest was 42.1 in winter in the bedroom, while the highest sound level in the educational environment was 72.37 dB in summer and the lowest was 61.75 dB in winter. Exposure of individuals to high levels of noise in educational institutions and in their homes means longer hours of exposure to noise pollution, which will negatively affect their health. Thus there is a serious need nowadays to adopt suitable control to reduce noise pollution at indoor points.

scholarly journals The excess of sanitary norms on noise from motor transport in the cities of Irkutsk and Angarsk (Irkutsk agglomeration)

2018 ◽  
Vol 26 (4) ◽  
pp. 409-418
Author(s):  
Svetlana A Novikova
Keyword(s):  
Noise Level ◽  
Negative Impact ◽  
Noise Pollution ◽  
Road Transport ◽  
Sound Level ◽  
World Health ◽  
The European Union ◽  
Residential Areas ◽  
Irkutsk Region ◽  
Health Organization

Acoustic pollution is a type of negative impact on the environment. According to the World Health Organization, the increased noise level is the second largest after pollution of the atmospheric air by the environmental cause of health problems in the population of industrial and transport cities. The increase in the number of road transport in the cities of the Irkutsk region leads to an increase in noise levels, its penetration into residential, public and office buildings. The increase in noise is also associated with the construction of new highways, bridges and roundabouts in cities. The article assesses noise pollution in large cities of the Irkutsk region. Observations on the composition and intensity of traffic at major intersections, highways and residential areas were carried out. With help of the sound level meter, noise level measurements were made in the daytime and at night and noise maps of the levels of the urban road network were constructed. The legislative basis for noise regulation in the Russian Federation and the countries of the European Union has been studied. A set of measures is suggested that contributes to reducing the acoustic impact on residents of the cities of the Irkutsk region.

scholarly journals PRINCIPLES OF ENSURING ENVIRONMENTAL WELFARE OF THE POPULATION UNDER THE EXPOSURE OF THE NOISE OF MOVING MOTOR TRANSPORT

Akustika ◽  
2019 ◽  
Vol 32 ◽  
pp. 222-226
Author(s):  
Ivan Alborov ◽  
Olga Burdzieva ◽  
Fatima Tedeeva
Keyword(s):  
Noise Pollution ◽  
Time Of Day ◽  
Research Field ◽  
Theoretical Research ◽  
Vehicle Speed ◽  
Residential Areas ◽  
The Road ◽  
Sound Levels ◽  
Implementation Costs ◽  
And Control

The article presents the results of theoretical research, field and instrumental measurements of traffic flow on the main streets of Vladikavkaz. It is shown that in the formation of noise pollution of the urban environment during the movement of vehicles on the roads of the Vladikavkaz city, the road covering material, vehicle speed, tire pattern wear and out-of-limit lifespan, etc., are of great importance. The economic analysis of noise shield devices of vehicles and the dependence of the decrease in the sound pressure of transport and the implementation costs are given. At the same time, the norms of permissible sound levels in residential areas depending on the time of day are shown, which is significant when assessing the environmental comfort of housing in noise-stressed areas of the city. At the end of the article, conclusions are given for various categories of institutions and control and supervisory bodies to ensure favorable sanitary and environmental conditions for the population.

scholarly journals Spatial characterization of noise levels at the Federal University of Agriculture, Abeokuta, Nigeria

2020 ◽  
Vol 4 (2) ◽  
pp. 323-340
Author(s):  
J. A. Oyedepo ◽  
D. M. Omoniyi ◽  
D. E. Oluyege ◽  
E. I. Babajide
Keyword(s):  
Noise Pollution ◽  
Sound Level ◽  
Noise Measurement ◽  
World Health ◽  
Residential Areas ◽  
Noise Levels ◽  
Noise Emission ◽  
Positioning Systems ◽  
Pollution Levels ◽  
The University

The study investigated the spatial variability in the distribution of noise pollution in Federal University of Agriculture, Abeokuta. Measurements of noise were taken from 10 locations on campus namely; the academic environment including the University library and college lecture auditoria, the residential areas comprising the Student hostels and Vice-chancellor’s lodge as well as other populated areas like the car park and student union building. The noise measurement was done in the morning and evenings of Mondays, Wednesdays and Saturdays over a period of 3 weeks in July 2019. The noise measurement was done with the aid of Smart Sensor Digital Sound Level meter (Model: AR824). The sampling points were geo-located using a hand-held receiver for Global Positioning Systems (GPS). Questionnaires were administered to members of the University community (staff and students) to determine their respective perception of campus noise on academic activities. Data (noise and survey) were subjected to statistical analysis. Spatial analysis of the noise levels includes surface interpolation (Krigging) to determine the spatial pattern of noise across the campus, particularly, the most tranquil and most chaotic locations. The results show noise pollution levels reaching 74.3 (db) and 73.0 (db) during weekdays at some locations on campus. The noise emission level at some locations within the University exceeded the World Health Organization and Federal Ministry of Environment of Nigeria’s permissible level of 55 db for residential areas. Generally, it was observed that the ambient noise from heavy duty generating with the student chattering put noise level above 35(db) to 55(db) recommended for educational institutions. It can be inferred from statistical analyses and spatial interpolations of recorded noise levels, that noise levels of many areas in FUNAAB exceed the recommended 40 db required for an institution of higher learning. The study however finds that staff and students have adjusted to the noise on campus. Lecturers have resorted to the use of public address systems in large classes while students go to serene locations for better assimilation when studying. The study recommends reduction of point-source noises such as replacing the diesel generators with solar power. Signage should be displayed at sensitive areas such as library to reduce unnecessary noise.

scholarly journals Estimation of noise pollution of Irkutsk by automobile transport

2019 ◽  
pp. 111-120
Author(s):  
S. A. Novikova
Keyword(s):  
Noise Pollution ◽  
Propagation Distance ◽  
Well Being ◽  
Sound Level ◽  
Urban Transport ◽  
Residential Areas ◽  
Software Complex ◽  
Night And Day ◽  
Traffic Composition ◽  
Level Meter

The work is devoted to estimation noise pollution generated by vehicles on the main and secondary highways in the city of Irkutsk. For this purpose, video surveillance of traffic composition and intensity was carried out at night and daylight hours. By sound level meter Testo-816 the measures of noise levels were conducted. Using the Ecolog-noise software complex, the noise propagation distance from the sources was modeled and the sound pressure level maps were created. The obtained results were compared with the current standards for permissible noise loads. An illustrative graph of the average daily noise level distribution shows that in Irkutsk there are two maxima (morning and evening) on all motorways. At the same time, night and day acoustic standards, set as maximum for both Russia and some European Union countries, are significantly violated. A possible set of recommendations is proposed to improve the existing urban transport system in order to reduce excessive noise and ensure the acoustic well-being of the population of residential areas adjacent to highways.

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