Showing 8 results for Noise
E Sekhavati, M Mohammadi Zadeh , E Mohammad Fam , A Faghihi Zarandi ,
Volume 13, Issue 2 (7-2014)
Abstract
Introduction: exposure to noise pollution leaves Different effects on human. Goal in this Paper is the prioritizing methods of control and reduce noise pollution in Larestan cement Factory using analytical hierarchy process (AHP).
Methods: For screening criteria and methods used in AHP technique, Delphi method was used. After polling of 15 experts, 8 criteria and 9 methods was selected from their consensus. Then, in order to prioritizing methods of reduce and control noise pollution, carried out Paired comparison of the methods and criteria, by experts using Analytical Hierarchy Process.
Results: result of paired comparison of criteria show that initial investment cost was the most important criteria with the relative weight of 0.247, satisfaction from using of method, Account for the least important with the relative weight of 0.035. A paired comparison of methods according to the target of selecting control methods show that Personal exposure to noise Control method with the weight of 0.224 .was the first priority, and Insulation of building’s Method with the weight of 0.067 was the last priority.
Conclusion: Because of personal exposure to noise control method obtained as the best method of controlling noise pollution in this Factory, ACGIH instruction about the time of noise exposure in the workplace suggested to directors.
Z Zamanian, M Barzideh, S Ghanbari, H Daneshmandi,
Volume 13, Issue 4 (11-2014)
Abstract
Introduction: Noise and light can affect on body posture during the study. With regard to the importance of the mentioned factors and their effect on body posture, measurement and assessment of these parameters seems essential in the study rooms. This study aimed to measure and assess these factors and their relationship with students' postural status.
Methods: In this cross-sectional (descriptive- analytical) study, 167 male and single students in dormitories of Shiraz University of Medical Sciences (SUMS) were selected. Measurement of noise and lighting was done according to the standards of the Iran National Committee on Occupational Health. The RULA method was used to assess the students' posture.
Results: In this study, light (433.88 ± 114.83 lux) and sound pressure levels (49.59 ± 4.64 dB) were obtained. The results of assessment of physical exposure to musculoskeletal risks by RULA technique showed that in 34.7% of the studied subjects, the level of exposure to musculoskeletal risks was in Action Level (AC) 2, 41.3% in AC 3 and 24% in AC 4.
Results showed no significant correlation between the sound the students' posture, but significant correlation was observed between light and the students' postural status.
Conclusion: Posture of students during the study has correlation with light. Therefore, improved lightening can improve student posture and consequently a remarkable help to increase the students comfort.
Z Zamanian , K Nikeghbal , H Ebrahimi ,
Volume 14, Issue 6 (3-2016)
Abstract
Introduction: The prevalence of job-related stress has been proved to be high within the dentists in different studies. This stress, resulted from such factors as poor lightening as well as noise of dental office, can cause emotional distress, threaten dentists’ physical health and affect their quality of life. Hence, this study aimed to evaluate dentists’ professional quality of life, job-related stress and two important workplace factors of lighting and noise.
Methods: In this analytical-descriptive and cross sectional study, the researcher visited the dental offices in Shiraz and measured lighting and noise of the places. Moreover, dentist's quality of life and job stress were determined using McGill quality of life questionnaire and job-stress questionnaire. The relationship between quantitative variables was determined using regression test and the multiple regression t est was also applied for the modeling process.
Results: The local noise mean cased by the dental drills was 75.5 and 74.5 in the public and private offices, respectively. In 2.2% of the dental offices, lightening condition was reported below the standard levels. The study results revealed that 58.9% of dentists participating in this study experienced good or fairly good quality of life.
Conclusion: The study findings suggested that workplace conditions were correlated with the dentists’ professional stress and quality of life. Training how to manage this psychological disorder can significantly reduce its destructive effects and as a result, quality of life can be increased.
H Zarei Mahmoud Abadi ,
Volume 14, Issue 6 (3-2016)
Abstract
Introduction: Persecutors of aircraft noise at an airport has a close relationship with the alternate of landing and take-off weight of the aircraft and operations planning during the night. Now aircraft that spill in Yazd airport and take-off of aircraft is of jet engines or so-turbofan mean that the resulting sound will be very high.
Methods: In this descriptive, cross-sectional measurement of noise from aircraft traffic noise measuring station 7,The completed questionnaires to assess the effects of noise pollution in Yazd International Airport and the surrounding noise sensitive areas in 2014 by a portable audio device measurement is done.
Results: The most amount of noise caused by aircraft traffic in the airport area and in adjacent areas with average noise level 84.8 dB at station No. 5 Regional Airport, located south of the airport, with an average noise level which was 75.5 dB. The results of analysis of questionnaires showed that 75 percent of people living in residential areas around the airport are being harassed by aircraft noise. Results indicate that, sleep disorders, nervousness, stress and mental illness and interfere with speech, regardless of the priority of different factors in the study area, are of the highest impact of aircraft noise.
Conclusion: Aircraft noise is the strongest negative environmental factors that affect employees and residents around Yazd International Airport and can be harmful to health. The noise for health personnel, particularly those of daily tasks, are daily exposed to aircraft intense noise ,
are highly undesirable. So, essentially preventive severe conditions such as mandatory use of protective devices and soundproof acoustic shortening service personnel are needed for these people.
Iraj Alimohammad, Fakhradin Ahmadi Kanrash, Jamileh Abolaghasemi, Kazem Rahmani,
Volume 18, Issue 1 (5-2019)
Abstract
Introduction: Noise is considered as a physical hazard that seriously threatens human health in industrial environments. It is also the most important and influential harmful physical factor in workplace that can affect the individuals’ lifestyle and job. The present study aimed to determine the effects of chronic noise on the hearing ability as well as psychological and mental attitudes of workers in the workplace.
Methods: This descriptive-analytical study was carried out to measure the sound intensity received by the individuals' ears at an 8-hour equivalent level based on ISO 9612: 2009 standard, using the Testo device (model CEL-815). Annoyance (negative mental attitude to work environment) was also measured using a questionnaire containing 11 questions. Furthermore, the Stroop and Tower of London (TOL) tests were applied to investigate the cognitive performance.
Results: A total of 300 people with the mean age of 36.03 ± 3.79 were included in this study. The results clearly showed a significant relationship between cognitive indicators and hearing loss (P < 0/05 ). A significant relationship was also observed between annoyance and hearing level at different sound frequencies (P < 0/05). Besides, the results of the Stroop, Tower of London, and cognitive performance tests had a significant relationship with the annoyance caused by chronic exposure to noise (P < 0/05).
Conclusion: The results of this study clearly showed the positive effect of hearing loss on annoyance and cognitive performance indicators among the workers exposed to chronic noise.
Ahmad Alizadeh, Fatemeh Taghavi Soghondikolae, Jamshid Yazdani Charati,
Volume 18, Issue 6 (2-2020)
Abstract
Introduction: Noise is one of the most important pollutants in worksites. Hospitals are imposed to noise pollution. Considering lack of research in Sari educational hospitals and applicability of noise control by engineering controls and education, we proposed this research to evaluate the sound pressure level (SPL) in three educational hospitals of Sari, Iran.
Methods: In a descriptive-analytical study, the SPL of three hospitals was evaluated using sound level meter (model; CACELLA CELL-490, made in England). The evaluation was performed in 1.5 meter height, in three shifts, and in three days of the week. Data were analyzed using descriptive statistic methods and SPSS software version 24. For assessing the rate of effective factors, the GEE (Generalized estimating Equation) methods were used.
Results: According to the results, the mean SPL was 63.30 ± 7.33 dB and a significant difference was observed between the mean SPL and the standard (35 dB) (p <0.001). Moreover, the highest mean of sound in hospitals was observed in Fatemeh Al-Zahra Hospital. Considering the week days, Saturday and among shifts, the night shift had the highest mean SPL.
Conclusion: The findings showed that SPL was higher than the Iranian National Construction Regulations and World Health Organization (WHO) standards in all evaluated places. So, the noise control programs should be considered seriously.
Ehsan Janati, Mohammad Ali Morowatisharifabad, Reza Jafari Nodoushan, Mohammad Javad Zare Sakhvidi, Sara Jambarsang,
Volume 20, Issue 4 (11-2021)
Abstract
Introduction: The body's response to noise pollution is very similar to the way the body responds to stress, which can lead to poor health over time. In this regard, this study was conducted to determine the general health of the elderly and its relationship with traffic noise pollution in Ardakan.
Methods: This descriptive cross-sectional study was conducted in 1399. Participants were 200 elderly people in Ardakan chosen by random sampling. Data were collected through sound measurement with SVANTEK device, General Health Questionnaire 28 (GHQ-28). After completing the questionnaires and measurements, the collected data were entered into SPSS-19 software and descriptive statistics as well as analytical statistics such as Chi-square, regression and analysis of variance were used to analyze them.
Results: The overall average sound level equivalent in decibels at all measuring stations was within the standard range. There was a significant relationship between noise annoyance, the dimensions of "anxiety symptoms ,sleep disorders" ,and "depressive symptoms" of general health (p <0.001).
Conclusion: People with more noise annoyance experience more anxiety, sleep disorders and depression. Existence of noise pollution levels in the allowable or standard level can lead to the observation of no significant relationship between traffic noise pollution levels and general health. Reducing anxiety, depression and sleep disorders in the elderly is possible with interventions to reduce noise annoyance in them.
Mr Hamid Reza Farahzadi, Mr Mohammad Hasan Ehrampoosh, Mr Gholam Hossein Halvani, Mrs Farimah Shamsi,
Volume 22, Issue 3 (9-2023)
Abstract
Introduction: Traffic noise annoyance is one of the consequences of urban life which can have adverse effects on human health including sleep quality. The present study intends to investigate the extent of noise annoyance and its relationship with sleep quality of residents adjacent to high- and low-traffic roads in Yazd city in 1399.
Methods: This was a cross-sectional study conducted in 1399 in Yazd. Data were collected using two standard questionnaires of assessing noise annoyance and Pittsburgh sleep quality. Responses were collected from residents around 10 high- and low-traffic roads, and a total of 200 samples were obtained randomly.
Results: The mean score of sleep quality for all participants was 11.5 ± 35.25, and the mean score of noise annoyance was 3.73± 1.9. There was a significant difference between the average quality of sleep and the score of noise annoyance in terms the type of road (P/00.001). In general, there was also a significant and direct correlation between noise annoyance and sleep quality (r = 0.569, P = 0.001). But, the correlation between these two variables was not significant with the separation of the types of roads.
Conclusion: Based on the results of the present study, the quality of sleep of residents around high traffic roads is moderate, which suggests that noise annoyance caused by traffic affects the quality of sleep. In other words, the noise annoyance caused by traffic has reduced the quality of sleep in people living adjacent to high-traffic roads.
