نتایج جستجو برای: equivalent noise level
تعداد نتایج: 1367872 فیلتر نتایج به سال:
Introduction: Installation of wind turbines in residential areas due to their unique sound characteristics may cause noise annoyance. Noise annoyance can increase the risk of health problems and sleep disturbance. Thus, this study was conducted to assess the effect of wind turbine noise annoyance on sleep disturbance among the Manjil wind farm workers. .Material and Method: All the Manjil wind...
Purpose: Hospital work generates noise. This article investigates the noise level in emergency departments (EDs) to assess the need to address this aspect of the work environment and to investigate whether the replacement of dry-erase with electronic whiteboards lowers the noise level. Method: In Study I we measured the noise level at the three coordination centres of an ED while it was still u...
in recent years noise has been well known as an environmental pollution. particularly its effects will be more serious in some environments including hospitals which patients need a calm and peaceful condition. this study aims to evaluate hospitals noise pollution level. this study is a cross-sectional study. noise measurements were made in all hospital wards in a workday and weekend from 8 to ...
The internal noise present in a linear system can be quantified by the equivalent noise method. By measuring the effect that applying external noise to the system's input has on its output one can estimate the variance of this internal noise. By applying this simple "linear amplifier" model to the human visual system, one can entirely explain an observer's detection performance by a combination...
Background and aims Overexposure to industrial noise pollution induce hearing loss workers. Occupational hearing loss may cause interference whit oral communication, so it may increase the risk of occupational accidents in workplace as well as affects whit social activities. This study was conducted on Lavan Island, are of oil extracting regions in the south of Iran. The object of this s...
Introduction: textile industry due to noise pollution may cause noise annoyance. Noise annoyance can increase the risk of health problems and sleep disturbance. Thus, this study was conducted to assess the effect of noise annoyance on the sleep disturbance among workers of a textile industry. Material and Method: All the workers have been divided into four groups according to their noise exp...
we investigated the issue of noise pollution in the bidboland gas refineryby noise measurement and surveys. the bidboland gas refinery has several process units.the sound pressure levels were measured at several places, such as units of 200, 300,400, 500, boiler, powerhouse area, cooling towers pumps, and maintenance area, and thecorresponding noise maps were produced by using sound plan softwa...
In this paper, we present an approach for analyzing the behaviour of editors in the large current awareness service “NEP: New Economics Papers”. We processed data from more than 38,000 issues derived from 90 different NEP reports over the past ten years. The aim of our analysis was to gain an inside to the editor behaviour when creating an issue and to look for factors that influence the succes...
Introduction Conclusions References Tables Figures
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید