نتایج جستجو برای: acceptable noise level anl test
تعداد نتایج: 1983163 فیلتر نتایج به سال:
Background and Aim: Noise pollution is recognized as a major problem in urban areas. Therefore, the current study was aimed to determine noise pollution indices in Birjand old districts. Materials and Methods: In this cross-sectional and analytical-descriptive study, noise measurement was performed by means of "CEL" sound level meter (model 450.490). Equivalent noise level "Leq 10 min" was meas...
Introduction: In Iran country, small enterprise with less than 10 workers comprise about %90 of all industries and 80% of working population. Noise, higher than the permissible level is among the hazardous agents, workers in these plants facing with. The aim of this study was to investigate the correlation between screening estimation and noise measurement in small plants. . Material and Metho...
Background and aims: Noise pollution is one of the risk factors of the human environment that may seriously threat physical and mental health of human beings. One of the main sources of this type of pollution is the noise produced by urban transportation and traffic, particularly subway in the environment. This article aims at study and evaluation of the noise condition in drivers’ cabin and ...
Background and Objectives: Noise pollution in cities, as a widespread and worldwide problem, can cause adverse health effects such as hearing loss. Traffic noise, as the most important source of urban noise, can influence many jobsincluding shopkeepers. The aim of this study was simultaneous assessment of traffic noise pollution and hearing threshold level of shopkeepers in congested area of Be...
We evaluated the occurrence of second cancers among 517 patients with non-Hodgkin's lymphoma (NHL) treated at the National Cancer Institute. Nine cases of acute nonlymphocytic leukemia (ANL) were observed compared to 0.08 cases expected (ratio of observed to expected cases, 105; 95% confidence limits, 48; 199). The excess risk of ANL was 4.1 cases per 1000 patients per year; the cumulative risk...
in this study, results of noise level measurements performed in 4 different mining sites aregiven. noise level measurements performed in opencast mining site of konya ilgin lignite corporation (ilc), in konya eyak mining quarry site and in aydin cine feldspar ore dressing facility have been evaluatedtogether with worker surveys. the noise level measurements performed in manisa soma uyar mining ...
in this study, results of noise level measurements performed in 4 different mining sites aregiven. noise level measurements performed in opencast mining site of konya ilgin lignite corporation (ilc), in konya eyak mining quarry site and in aydin cine feldspar ore dressing facility have been evaluatedtogether with worker surveys. the noise level measurements performed in manisa soma uyar mining ...
Introduction: Using diesel generators is necessary for activities like welding in construction sites and it is often accompanied with noise pollution. The aim of this study was to evaluate noise pollution induced by diesel generators in construction activities in one of the districts of Tehran city. Material and Method: In this descriptive study, 14 construction sites were selected for th...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید