Reduce Noise Pollution Research Articles

Influence of Environmental Conditions and The Students' Health

Healthy students are not merely a result of good genes; they are also a product of an environment that fosters and encourages their well-being through a mutual influence of environmental conditions. This study determined the influence of environmental conditions on students' health in one of the basic education schools in Ozamiz City during the S.Y. 2023-2024. It employed a descriptive-correlational design with 249 Senior High School respondents chosen through simple random sampling. The Environmental Conditions and Students' Health Questionnaires with a five-point Likert scale were used as data gathering instruments. Mean, Standard Deviation, and the Pearson Product Moment Correlation Coefficient were used as the statistical tools to analyze the gathered data. Results revealed that the students' environmental conditions on air quality, water quality, access to green spaces, built environment, social and community support, transportation, and commute, and environmental were good, while noise pollution and temperature were fair. The students' overall health was good, including their physical, mental, and social health. The students' environmental conditions greatly influenced their health and well-being. The learning environment of students plays an important role in their health and well-being. School administrators may prioritize reducing noise pollution and regulating temperature while investing in sustainable practices, green spaces, and community support to create a healthier learning environment.

Strategic Planning Approach for Noise Control in Urban Areas

Cities, accommodates more than half of the world population, contributes a major role in overall global development. However, the urban environment has its own challenges, and most prevalent issue is noise pollution, and it is described as a contemporary plague. This problem is linked to various health issues in public like depression, fatigue, insomnia, headaches, and decreased concentration etc. Compounding the issue is the cumulative impact of noise, where the detrimental effects may not manifest immediately. The study emphasizes the critical need for strategic planning approach and the measures to tackle various urban noise sources. The study also focuses into existing policies and guidelines on noise control in Indian urban context and explores different noise analysis approaches and regulations of other countries through case studies. The analysis delivers a set of recommendations on reducing noise pollution through noise zoning, based on the case studies. These recommendations range from the installation of noise barriers along transportation corridors to the implementation of zoning regulations that segregate noisy industrial or commercial activities from residential areas. Additionally, the study advocates for the establishment of strict noise limits tailored specifically for road traffic, underlining the pivotal role of well-designed public transport systems. This not only help in reducing noise impacts but also promotes sustainable urban development. Overall, the study attempts to create quieter, healthier sustainable urban spaces.

Investigation of social change in cities after participation in cittaslow union in Ordu-Perşembe district

This study presents a case study of the social changes brought about by participation in the Cittaslow Union in cities. The research focuses on the Perşembe district of Ordu province and aims to analyze the effects of Cittaslow on the social structure. Data collection involved the use of 100 valid surveys. The results indicate that significant social changes occurred in the Perşembe district following its participation in the Cittaslow Union. Surveys and observations show an increase in tourism activities. This is due to heightened public awareness, which has been brought about by increased official institutional efforts to inform about Cittaslow. Furthermore, the Cittaslow Union's participation in Perşembe district has resulted in the wider availability of locally sourced food, increased promotion of cycling, and a reduction in vehicle noise pollution. Furthermore, the Cittaslow Union's participation in Perşembe district has resulted in the wider availability of locally sourced food, increased promotion of cycling, and a reduction in vehicle noise pollution. These changes have had a positive impact on the district's quality of life and social structure. The community has adopted a more sustainable and participatory lifestyle because of the Union's involvement. It can be inferred that the city has benefited from the approach. The identified changes demonstrate that participation in the Cittaslow Union in the Perşembe district has positive effects on the adoption of a sustainable and participatory lifestyle within the community. This study on the effects of the Cittaslow Union in the Perşembe district can be considered an important step in promoting sustainability and social participation in cities.

The effects of COVID-19 on agriculture supply chain, food security, and environment: a review.

COVID-19 has a deep impact on the economic, environmental, and social life of the global population. Particularly, it disturbed the entire agriculture supply chain due to a shortage of labor, travel restrictions, and changes in demand during lockdowns. Consequently, the world population faced food insecurity due to a reduction in food production and booming food prices. Low-income households face food security challenges because of limited income generation during the pandemic. Thus, there is a need to understand comprehensive strategies to meet the complex challenges faced by the food industry and marginalized people in developing countries. This research is intended to review the agricultural supply chain, global food security, and environmental dynamics of COVID-19 by exploring the most significant literature in this domain. Due to lockdowns and reduced industrial production, positive environmental effects are achieved through improved air and water quality and reduced noise pollution globally. However, negative environmental effects emerged due to increasing medical waste, packaging waste, and plastic pollution due to disruptions in recycling operations. There is extensive literature on the effects of COVID-19 on the environment and food security. This study is an effort to review the existing literature to understand the net effects of the pandemic on the environment and food security. The literature suggested adopting innovative policies and strategies to protect the global food supply chain and achieve economic recovery with environmental sustainability. For instance, food productivity should be increased by using modern agriculture technologies to ensure food security. The government should provide food to vulnerable populations during the pandemic. Trade restrictions should be removed for food trade to improve international collaboration for food security. On the environmental side, the government should increase recycling plants during the pandemic to control waste and plastic pollution.

The influence of gear load distribution based on coupled systems on gearbox meshing noise

Introduction: With the rapid development of the gearbox manufacturing industry, the internal gear response has received attention, and the control of meshing noise during gear operation has been studied. Conventional noise reduction methods are usually based on gear order, and with the improvement of gearbox manufacturing technology, this method gradually becomes difficult to cope with a wide range of data.Methods: To expand the search domain of noise control systems, this study combines gear response and gear order, and adds the condition of gear uniform load. For common noise reduction problems in composite systems, this study improves the time-varying stiffness excitation mechanism and generates a coupled system.Results: Finally, this study conducts experiments on the Gmnoi dataset and compares it with three systems including quantum genetics to verify the superiority of the proposed system. The suppression effects of the four systems on gear meshing noise were 98.4%, 95.8%, 93.5%, and 92.7%, respectively. Their highest performance for different gear groups was 623, 514, 406, and 423, respectively.Discussion: The experimental results showed that the proposed coupling system has strong robustness and high accuracy in controlling gearbox meshing noise, and is of great significance in reducing noise pollution and improving the working environment of the gearbox.

Fly Ash and Fiber Waste As Principal Geopolymer Mortar Material: A Review

Geopolymer mortar is an innovative mortar using fly ash waste as an alternative to cement. The development of advanced fiber geopolymer mortar materials is an alternative solution to the weaknesses and shortcomings of conventional materials so that they have the ability to reduce and even absorb sound intensity and prevent noise propagation in overcoming noise problems in the field of building construction. Many factors can affect sound absorption, including the type of aggregate, modification of material composition that has a density level in fiber geopolymer mortar. The development of fiber geopolymer mortar can be developed in the construction field to reduce sound frequency and improve sound insulation. There are also different measurement mechanisms to determine the performance of the material in improving sound quality. This paper aims to review the performance of sound-absorbing fiber geopolymer mortar. This review is expected to provide insight into the development of fiber geopolymer mortar in building construction to improve comfort and reduce noise pollution.

DESIGNING OF NOISE POLLUTION MEASURES FOR A MILITARY AIRFIELD

This article discusses the possibilities of reducing noise pollution in the vicinity of a selected airport, with an emphasis on practical measures. The proposed procedures, which are routinely employed at commercial airports, would be ineffective or financially unsustainable under the circumstances of the military airports. The objective at military airports is not to maximise capacity, as at civil airports, where the desire to increase capacity is primarily related to profit. The primary objective for military airports is to perform defined tasks, which may include pilot training, search and rescue exercises and combat training. The main measures proposed to reduce noise pollution in the vicinity of the villages are changes in departure and arrival routes, the splitting of night operations into two parts and the introduction of a new article in the AIP and Airport Regulations prohibiting air operations over and in close proximity to the villages nearby. Finally, it is stressed that a significant reduction in noise will only be possible with the support of changes in legislation or above-standard financial investment by the airport operator.

Advancements in nanotechnology for acoustic management in pickleball

This research investigates the use of advanced nano-fiber technology for sound and noise management in pickleball courts. The technology, known for its flexibility and adaptability, addresses the unique acoustic challenges of pickleball, a sport with a distinctive noise profile characterized by impulsive and unpredictable sounds. These nano-fibers are particularly effective in absorbing mid to high-frequency noises (800–5000 Hz) common in pickleball. Incorporating these nano-fibers into acoustic foams and textiles significantly enhances sound absorption, allowing for thinner materials while doubling performance compared to conventional materials. These fibers, about 1/500th the diameter of human hair, have a high surface area to volume ratio, aiding in sound scattering and increased friction with air molecules. This structure enables the efficient transformation of sound energy into heat, which is then effectively dissipated. Aligned with the Acoustical Society of America's standards, this abstract emphasizes a scientific breakthrough in sports acoustics, contributing to the reduction in urban noise pollution. The study underscores the impact of cutting-edge material technology in improving environmental acoustics and community well-being.

Eco-friendly Noise-absorbing Panels from Waste Materials: A Sustainable Solution to Control Noise Pollution

This research article deals with one of the major forms of pollution that is invisible but is a threat to living beings. Controlling noise pollution is important so to deal with this, a test was performed using a method known as the impedance tube method. To tackle this noise pollution a sustainable material would be good to use, so waste coming from food industries such as orange peel, sugarcane husk, and eggshells are used with newspaper sludge as a binding material. Disks were prepared of 90mm with different constituents of waste material and paper sludge. The test result showed that these panels were able to reduce sound coming from the source to the receiver side. Sound absorption capacity is different for every material depending upon their structural features. The test was done with 120 decibels of sound and at 120 decibels the SAC (sound absorption coefficient) was 0.35 which is better than other commercially available chemical-infused materials such as glass wool, mineral wool etc. As they are not better for the environment as well as living around. They cause lung disease if inhaled and skin problems come in contact with them. Materials in use for soundproofing have polyurethane which releases a high amount of smoke if brunt hence we cannot rely on this in case of fire. Hence environmentally friendly as well as materials that do not catch fire or realise high amounts of smoke and are also cost-effective should be used to reduce noise pollution in the environment we are living in.

Noise Pollution Status in South-South Nigeria

Noise pollution has gotten more significant as cities have grown more densely populated. This study aimed to assess the noise pollution level in the capital cities of Awa-Ibom, Bayelsa Calabar and Rivers State, South-South, Nigeria. Noise level measurement was conducted using Noise Level Meter (NM102). Noise level measurement for all sampling locations were conducted on working days (Monday through Friday) between February 2022 and January 2023. Results showed that noise concentration in Port Harcourt ranged between 31 and 103 db(A), 31 and 103 db(A) in Calabar, 32.1-90.1 in Uyo and 30.1-83 db(A) in Yenagoa. The noise levels in Rivers, Calabar and Uyo exceeded the WHO limit of 90 db(A). This has great consequence on the comfort and health of persons residing close to areas with high noise generation. Measure to reduce noise pollution should be put in place in these cities.

Managing health through environmental policies. Analysis for European Union countries

PurposeEnvironmental degradation resulting from human activities may adversely affect human health in multiple ways. Until now, policies aimed at mitigating environmental problems such as climate change, environmental pollution and damage to biodiversity have failed to clearly identify and drive the potential benefits of these policies on health. The conducted study assesses and demonstrates how specific environmental policies and instruments influence perceived human health in order to ensure input for a data-driven decision process.Design/methodology/approachThe study was conducted for the 2004–2020 period in European Union (EU) countries with the use of dynamic panel data modeling. Verification of specific policies' impact on dependent variables allows to indicate this their effectiveness and importance. As a result of the computed dynamic panel data models, it has been confirmed that a number of significant and meaningful relationships between the self-perceived health index and environmental variables can be identified.FindingsThere is a strong positive impact of environmental taxation on the health index, and the strength of this relationship causes effects to be observed in the very short term, even the following year. In addition, the development of renewable energy sources (RES) and the elimination of fossil fuels from the energy mix exert positive, although milder, effects on health. The reduction of ammonia emissions from agriculture and reducing noise pollution are other health-supporting factors that have been shown to be statistically valid. Results allow to identify the most efficient policies in the analyzed area in order to introduce those with the best results or a mix of such measures.Originality/valueThe results of the authors' research clearly indicate the health benefits of measures primarily aimed at improving environmental factors, such as environmental taxes in general. The authors have also discovered an unexpected negative impact of an increase in the share of energy taxes in total taxes on the health index. The presented study opens several possibilities for further investigation, especially in the context of the rapidly changing geopolitical environment and global efforts to respond to environmental and health challenges. The authors believe that the outcome of the authors' study may provide new arguments to policymakers pursuing solutions that are not always easily acceptable by the public.

A new perspective on the performance comparison of pure electric buses versus converted electric buses in public transportation systems

Abstract The utilization of electric buses presents a viable solution to the reduction of greenhouse gas emissions and the concomitant decrease in fossil fuel consumption. Furthermore, their low-noise operation has the additional benefit of reducing noise pollution, which is a particular issue in large urban areas. This constitutes a significant advantage for public transport systems. Additionally, they provide cost savings in operations and maintenance, which represent a substantial proportion of expenditure for public transport operators. However, the initial purchase cost of electric buses is higher than that of conventional buses (diesel and CNG). This discrepancy can be attributed primarily to the absence of economies of scale in the manufacturing of electric bus subsystems and the substantial expenses associated with non-standardized, disparate technologies, most notably the high-voltage traction battery. The considerable disparity in the upfront cost of electric buses (in comparison to their internal combustion counterparts of equivalent specifications) has prompted a novel strategy among local authorities responsible for the provision of public transportation services: Retrofit! This paper presents, for the first time, a comparison between all-electric buses constructed from the ground up and retrofitted diesel-electric buses in actual public transportation operations. The results obtained will facilitate an evaluation of the retrofit approach within the context of sustainable transport policies, with the ultimate objective of raising awareness among relevant audiences and decision-making mechanisms.

A Nature-Inspired Green–Blue Solution: Incorporating a Fog Harvesting Technique into Urban Green Wall Design

This research aims to explore the use of vegetation and nets to collect water from fog on facades to meet the needs of buildings’ functional requirements, particularly outdoor thermal comfort, water demands, and encouraging sustainability by suggesting a new architectural green–blue wall system. The system is posited to be applicable within an urban context, given its minimal spatial requirements and adaptability to existing structures. However, similar challenges to those encountered by green walls are anticipated, wherein the provision of sustainable benefits is offset by the demands of maintenance and associated additional costs. For this reason, this paper is mainly divided into two parts: in the first part, green facades are explained, referring to their effect on urban environment, including thermal comfort, pollution absorption, noise pollution, and well-being, as well as types of plants to apply on green walls; the second part focuses on the fog collector as an irrigation system for green walls, analyzing its components, structure, and fabric, to identify its development margins in the construction industry. Fog harvesting initiatives predominantly focus on rural regions to cater to agricultural demands; however, limiting fog harvesting to agricultural settings is considered insufficient, as it represents a crucial solution for addressing water challenges in specific urban environments. Nevertheless, it is worth investigating the fog collector’s potential for integrating water supply in urban environments as well. The study focuses on exploring the environmental benefits of fog harvesting and green walls, particularly through their combined implementation. The proposed review is significant for guiding the integration of a device into green facades, ensuring water self-sufficiency while concurrently addressing air purification, noise reduction, and thermal comfort for pedestrians and urban inhabitants. Nevertheless, it is worth investigating the fog collector’s potential for integrating water supply in urban environments as well. The proposed review is, therefore, useful for integrating a device represented by the fog harvesting system, also identified in the text as the blue system, into the design of green facades, identified in the text as the green system, integrating the blue element in the design of the green wall to make them water self-sufficient and at the same time purifying the air, reducing noise pollution, or giving thermal comfort to pedestrians and inhabitants of the urban context.

Acoustic analysis of chevron nozzle: A CFD approach

Noise pollution from aircraft is a critical environmental issue, affecting not only wildlife but also human health and comfort, especially for populations living near airports. The recent, researchers have been primarily focused on reducing noise pollution in aircraft systems. Among the major contributors to noise pollution are the aircraft engine and nozzle. To address noise in the nozzle, the chevron nozzle, characterized by a sawtooth pattern at its edge, has been commercialized. Thus, there is a need for dependable Computational Fluid Dynamics (CFD) capabilities to swiftly assess initial designs for noise reduction and analyze problems that involve fluid flows. For noise reduction in aircraft systems, CFD capabilities are essential. This study conducts Finite Element Method (FEM) analysis of the chevron nozzle. Additionally, design optimization is performed utilizing the Taguchi method.

Solar wireless charging of battery in electrical vehicle

Energy comes from a variety of natural sources, including the sun, nuclear power plants, and the chemical energy found in fuels. This study explores innovative solar-powered wireless charging methods for electric vehicles, aiming to enhance both efficiency and environmental sustainability. Traditional gasoline-powered vehicles contribute significantly to air pollution, noise pollution, and environmental degradation. In contrast, wireless charging technology, particularly through wireless power transmission (WPT), offers a cleaner alternative by eliminating the need for physical connections and reducing the associated emissions. The study highlights that WPT is not only reliable and effective but also operates silently, further contributing to a reduction in urban noise pollution. By integrating solar power, this method not only supports sustainable energy practices but also advances the push towards a cleaner and quieter future for transportation.

The Relationship between the Environmental Noise Intensity, Feeling and Annoyance with the Shiftwork in the Emergency Department

Background: Noise pollution is a serious issue in hospitals, especially in emergency departments where high noise levels from emergency patients and treatments can negatively affect medical personnel and patients. This study aimed to measure noise levels during day and night shifts in three major hospitals affiliated with Tehran University of Medical Sciences (Imam Khomeini, Shariati, and Sina hospitals) and investigate the level of annoyance experienced by medical staff.
 Methods: In this cross-sectional studyTES-1351B sound level meter was used to measure sound pressure levels and the measurement stations were determined according to ISO 9612 standard. A general questionnaire was used to determine demographic characteristics. Also, by a valid self-reporting questionnaire, the feeling about environmental noise intensity and noise annoyance was measured. Statistical analysis was done by SPSS software using ANOVA and t-test.
 Results: The average sound pressure level in the emergency departments of the studied hospitals was 67.940±7.70 dB. Significant differences were found between morning and evening shift noise levels. (p-value=0.001). The highest average sound pressure level occurred during the evening shift with an average of 72.382±4.35 db. Also, there was a significant difference between the feeling about environmental noise intensity and noise annoyance in Imam Khomeini and Sinai hospitals respectively, (p-value=0.037) (p-value=0.011).
 Conclusion: The study concludes that noise pollution in the emergency departments of these hospitals needs attention. Implementing administrative and technical-engineering measures to reduce noise pollution is essential to enhance the well-being of medical staff and patients and ensure a more satisfactory healthcare environment.

Charging Type Selection for Electric Buses Using Interval-Valued Neutrosophic Decision Support Model

Using electricity to fuel buses has always been known as a green option for the public bus operations considering the recent regulations on environmental and climate concerns. Emission-free public transportation modes such as electric buses improve local air quality and reduce noise pollution and also contribute to achieving sustainability goals by developing a sustainable transportation system. Many projects have been carried out using different charging strategies for electric buses around the world. However, selecting the most appropriate charging strategy for the electric buses in the public transportation is a challenging and multidimensional decision-making problem for transportation management sector. Therefore, this article proposes a decision support model based on the interval-valued neutrosophic set which uses Shannon's entropy and mixed aggregation by comprehensive normalization technique to choose the most appropriate charging type for urban electric buses among alternatives such as opportunity, depot, inductive, and no shift. This article presents a real-life case study in Turkey to illustrate the applicability and advantages of the proposed model. Extensive sensitivity analysis and comparative analysis tests are conducted to show the robustness of the proposed methodology. The results show that depot charging is the most suitable charging strategy for Istanbul's bus operator system.

Experimental investigation of effects of tertiary fuel on carbon deposition and emissions level of compression ignition engine

This study investigates the effect of increasing urbanization on the demand for petroleum products, which are limited natural resources. The study evaluated the use of biodiesel and clove oil as additives in diesel fuel to reduce carbon deposition on engine parts and noise emissions. Three fuel samples were tested: B30 (30 % biodiesel and 70 % diesel), clove oil at 3000 parts per million (PPM), and D100 diesel fuel. Endurance tests were conducted at a constant load and revolution per minute (RPM) to analyze carbon deposition on engine parts as well as noise emission levels at constant and variable RPM. It was found that biodiesel blended fuel had higher carbon deposition formation compared to diesel fuel, with a deposition rate of 77.48 % for B30 and 71.84 % for D100. In contrast, when clove oil was added to biodiesel, engine part deposition was decreased compared to diesel fuel, with a deposition rate of 47.71 % for clove oil. Furthermore, the study analyzed noise emissions at four positions (left, right, back, and top) using the three fuel samples. Clove oil showed lower noise emissions compared to diesel, indicating that it can help reduce noise pollution.

Effectiveness of Noise Barriers Based on Waste Materials in Case Study of Residential Noise Due to Double-Track Railways

The noise pollution in residential areas adjacent to double-track railways can significantly disturb the comfort and well-being of residents. The noise originates from passing trains on these double-track railways. The research problem aims to compare the noise levels in the residential area with the standard noise threshold and evaluate the effectiveness of a noise barriers based on waste material called sustainable noise barrier. The effectiveness of reducing noise levels for communities residing near the dual railway lines. The sustainable noise barrier is constructed using waste cardboard and sawdust as sound absorbers for reducing noise from passing trains. The objective of the research is to analyze the noise levels in the residential areas near the dual railway lines, referring to the noise threshold value specified in Kep.MenLH No.48 of 1996, which is 55 dBA. Additionally, the research aims to assess the effectiveness of the sustainable noise barrier in mitigating noise pollution in these residential areas. The research employs a quantitative experimental method, following the SNI 8427 of 2017 standard for measuring residential noise pollution and determining the sustainable noise barrier's effectiveness using Insertion Loss (IL) and Sound Transmission Loss (STL) measurements in both laboratory-scale and existing conditions (alongside the double-track railways). The research findings indicate that the noise levels in residential areas adjacent to dual railway lines exceed the threshold value, reaching 78.08 dBA. However, the sustainable noise barrier proves to be effective in reducing noise pollution by 27 dB at a frequency of 1,000 Hz in the residential areas neighboring the double-track railways. This research suggests that limiting noise disturbances in residental areas bordering railway lines is one solution with noise barriers.

Designing an IoT-Based System for Monitoring Noise Levels in the Computer Science Faculty and Library of the Technological University of Panama.

Noise pollution is a growing problem in urban areas, and it is important to study and evaluate its impact on human health and well-being. This work presents the design of a low-cost IoT model and implementation of two prototypes to collect noise level data in a specific area of the regional center of Chiriquí, at the Technological University of Panama that can be replicated to create a noise monitoring network. The prototypes were designed using Autodesk Fusion 360, and the data were stored in a MySQL database. Microsoft Excel and ArcGIS Pro were used to analyze the data, generate graphs, and display the information on maps. The results of the analysis can be used to develop strategies to reduce noise pollution and improve the quality of life in urban areas.