Risk assessment of noise pollution by analyzing the level of sound loudness resulting from central traffic in Shiraz

Negahdari, Hadi; Javadpour, Sirus; Moattar, Faramarz; Negahdari, Hashem

doi:10.15171/ehem.2018.29

Cited by 4 publications

(5 citation statements)

References 17 publications

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“…In this regard, sound pressure level measuring and frequency analysis were carried out and frequency was below 50 Hz with 115 dB. These two frequencies were determined as the disturbance frequency and the prevailing sound pressure level [59].…”

Section: Methodsmentioning

confidence: 99%

Designing, constructing and testing of a new generation of sound barriers

Negahdari

Javadpour

Moattar

2019

J Environ Health Sci Engineer

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Purpose Nowadays, noise pollution is considered a major environmental problem which has affected the health and comfort of millions of people around the world. Solving the mentioned problems need to design a new generation of acoustic barriers. Acoustics experts believe that stopping and absorbing the low-frequency sound is difficult. The aims of this study were to remove the harmful frequency in industries and cities. This study concentrates on the reduction of the noise level and increasing the mass law and resonance at low frequencies. Methods Sound measurement and frequency analysis did to fix the harmful frequency in the Shiraz city and in the Shiraz Gas Power Plant. COMSOL 5.3a software used for simulation. Suitable material chose for the manufacture of the sound barrier through the Cambridge engineering selection software 2013. The meta-material sound barrier made and tested in the acoustic room and in the free space. Results analyzed and optimized by Design of Experiment (DOE) and Response Surface Methodology (RSM) software. Mini Tab. 18.1 software used for Statistical Calculations. New sound barriers manufactured with adding new strategies to previous studies to improve the performance of meta-materials like beautification inspired from the flowers of nature and increasing of resonance in internal pipes. Results Three mechanisms used in this scatterer model which included, resonance phenomenon, Band Gap (BG) without absorption mechanism and inner-fractal-like structure. Our technique showed an advantage to reduce at frequencies below 100 Hz without adsorbent usage. The results showed that reduced noise exposures about 17.8 dB at frequency 50 Hz, about 9.1 dB within the range of 250 Hz according to EN 1793-2 standard (Lab Highlights Resonance phenomenon in IQFSCAB can reduce noise pollution. The Stopping and Absorbing of the low-frequency noise is difficult. Noise pollution is one of the most important environmental challenges in many countries. New barriers have added a number of new strategies to previous studies. Our technique shows a clear advantage to resonance at frequencies below 100 Hz without adsorbent usage. Three mechanisms have been used in this scatterer model including resonance phenomenon, BG and inner-fractal-like structure without absorption mechanism.

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Section: Methodsmentioning

confidence: 99%

Designing, constructing and testing of a new generation of sound barriers

Negahdari

Javadpour

Moattar

2019

J Environ Health Sci Engineer

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“…This correlation is linear without a threshold. Negahdari et al (2018) examined the danger of noise pollution caused by central traffic in Shiraz and found that the sound pressure levels above the Iranian environmental regulations and the values of the pressure levels were higher than the international limits.…”

Section: Literature Reviewmentioning

confidence: 99%

Environmental Noise in Residential Environments: The Case for Quality of Life in Minna, Nigeria

Akande¹,

Yusuf²

2022

E-BPJ

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Environmental noise pollution lowers the quality of life and is a public health concern in residential areas. In Minna, Nigeria, the effects of exposure to noise pollution on inhabitants' health and well-being were examined in this study. The indicated maximum limits for tolerable noise levels for quality of life in a home context were exceeded by the noise data measured using a sound level meter, a hand-held geographic positioning system, and a structured questionnaire (N = 880). The study recommended the design of noise-absorbing buildings, improved urban and infrastructure planning, and noise-regulating measures for a considerable increase in the quality of life of people. Keywords: Environmental noise; Public health; Quality life; Residential environment eISSN: 2398-4287 © 2022. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians/Africans/Arabians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. DOI: https://doi.org/10.21834/ebpj.v7i22.4161

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“…There are two filters named A and C in this sound meter. The network "A" modifies the frequency response in order to follow approximately the equal loudness curve of 40 phons, while the network "C" modifies approximately the equal loudness of 100 phons [1]. The facepiece filtering respirators have been widely used to reduce human exposure to the aerosol particles.…”

Section: Introductionmentioning

confidence: 99%

Noise Pollution Assessment in Sylhet City Corporation Using Geographic Information System (GIS)

RAHMAN

Alam²

2022

JAEHR

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Background: Noise pollution is a risk factor for human health which is continuously increasing in Sylhet City corporation, located in the Sylhet division in Bangladesh. Methods: In this study, we assessed the noise pollution level in Sylhet City by comparing it with the standard noise level. Also, the outcomes of this study were compared to other studies from different countries. In order to measure the noise level in decibel, BSWA 308 device was used in this study. A total of 38 samples were taken from different geographical locations in Sylhet City Corporation. The 38 samples provided 96 to 99% accuracy with a 95% confidence level of >36. Results: The decibel values ranged from 72 to 86 dB. From the observed data we calculated the values as follows: L10, L50 and L90 and Noise Climate (NC)=12.7 dB, equivalent continuous noise level Leq=77.18 dB and noise pollution level Lnp=89.88 dB. A contour map of the area was made using Arc GIS software version 10.5. Every line in the contour map defined a specific decibel value. The map was made by 2 dB intervals between the corresponding contour lines. More than 30% of the study area was vulnerable to a high level of noise (>82 dBA), and about 30% had the lower level of noise (<77 dBA). Only 40% of the area had moderate noise levels (i.e., between 77 to 82 dBA). Conclusion: After comparing the outcomes of noise level in this study with previous studies, we observed that the noise level of this area was more than acceptable limit for all parameters.

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Risk assessment of noise pollution by analyzing the level of sound loudness resulting from central traffic in Shiraz

Cited by 4 publications

References 17 publications

Designing, constructing and testing of a new generation of sound barriers

Designing, constructing and testing of a new generation of sound barriers

Environmental Noise in Residential Environments: The Case for Quality of Life in Minna, Nigeria

Noise Pollution Assessment in Sylhet City Corporation Using Geographic Information System (GIS)

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