نتایج جستجو برای: combined noise air quality
تعداد نتایج: 1447061 فیلتر نتایج به سال:
Background­ and objectives : Research has consistently shown that air quality personal factors and work related factors were the most effective parameters for sick building syndrome. Several epidemiological studies have been carried out to show the prevalence of the sick building syndrome among the office workers but less attention has been paid to the relation of the sick building s...
bus rapid transit is an innovative, high capacity, lower cost public transit solution in metropolitan cities. idea is to dedicate lanes for quick and efficient transport of passengers to their destinations. in the present investigation the environmental impact assessment of bus rapid transit in tehran metropolitan city is brought out. for this purpose bus rapid transit lane no. 10 is investiga...
Background: Symptoms such as headache, dizziness, nausea, cough and sneeze, irritated mucous membrane, eyes, throat, nose, inflammation and itching skin are associated with one of indoor air quality diseases, called sick building syndrome. The aim of this study was to assess the prevalence of symptoms of the syndrome and some related factors in educational hospital intensive care nurses in Kerm...
The outdoor noise levels from the various work places of the integrated steel plant were measured. The average noise level (L(eqst)) at the outdoor was found between 59-84 dBA. The combined noise level (L(eq)) of the plant was 90 dBA and 92 dBA on 1.12.2006 and 1612.2006, respectively. The noise levels in the far fields were found between 43-70 dBA for daytime and meet the noise quality for ind...
Background: Noise pollution is the third most dangerous risk factor for human health after air and water pollution. The aim of this study was to evaluate the effect of noise pollution on sleep disturbance among Neyshabur governmental teaching hospital staff, Iran, in 2015. Materials and Methods: This cross-sectional study was conducted in winter 2015. The sample size was 261 people from 2 hosp...
in order to the enhancement of the quality of speech corrupted by additive noise, a speech enhancement method has been put forward based on the combination of spectral subtraction and binary masking. spectral subtraction is a powerful method for removing noise from speech and binary masking provides essential elements to be used in monaural speech segregation. in the proposed combined method, f...
Leicester’s ITS provides a rich source of data (from traffic detectors, monitored both in real-time and archived, Air Quality Monitoring Stations, weather stations and meteorological services) which is integrated in an Air Quality Modelling Systems framework. The MESSAGE Project’s ‘Grid enabled’ “e-Science” infrastructure demonstration shows how additional data from pervasive environmental sens...
Background and aims: Discharging compressed air through conventional single jet nozzles or open pipes is a common jet noise in industry. This study is aimed to reduce air blow gun jet noise by designing and fabrication of multiple jet nozzle as a substitute for conventional single jet nozzles. Methods: One of the most common commercial air blow gun equipped with a conventional single j...
background: ototoxic chemicals can impair the sense of hearing and balance. in the past decades, the ototoxicity of solvents and their interaction with noise have become evident. this study has been carried out in the shoe manufacturing factory in tehran (iran) with the aim of evaluating the combined effects of noise and toluene on the workers' hearing. materials and methods: this cross-se...
Background and aims: In the steel industry, air blowers used to supply compressed air are considered as sources of annoying noise . This study aims to design an acoustic room chamber in order to control the noise level of the air blower. Methods: Measuring of the noise level along with frequency analysis was performed by using sound level meter, model ofCASELLA-Cell.450 . Dosimetery was per...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید