نتایج جستجو برای: equivalent sound level

تعداد نتایج: 1290264  

Journal: :jundishapur journal of health sciences 0
sahar geravandi department of nursing, tehran medical sciences branch, islamic azad university, tehran, ir iran afshin takdastan environmental technologies research center, department of environmental health engineering, health faculty, ahvaz jundishapur university of medical sciences, ahvaz, ir iran elahe zallaghi department of environmental, khouzestan sciences and research, islamic azad university, ahvaz, ir iran mehdi vousoghi niri department of environmental health engineering, health faculty, ahvaz jundishapur university of medical sciences, ahvaz, ir iran mohammad javad mohammadi department of environmental health engineering, health faculty, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of environmental health engineering, health faculty, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-9355439707 hamed saki department of environmental health engineering, health faculty, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

conclusions according to the results of this study, with increasing load of traffic, there is an increasing need for proper consideration plans to control noise pollution and prevent its effects. results according to the research findings, the equivalent sound pressure levels in all stations were 76.28 ± 3.12 db (mean ± sd). according to sound measurements and the survey questionnaire, noise po...

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...

احمدی, سعید, لطفی, معصومه, منصوری, نبی الله, منظم, محمدرضا,

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...

ژورنال: طب کار 2016

Introduction: A hospital as a health care institution providing  treatment services can be heavily influenced by sources of noise. Noise pollution has negative impacts on patient comfort and staff welfare. This study aimed to evaluate the relationship between noise annoyance and sensitivity with noise parameters (PNC, SIL) in the hospitals of Behbahan. Methods: This study...

ژورنال: طب کار 2022

Introduction: Overhead cranes play a vital role in guiding steel industries and maintaining their normal condition. These machines are operated by humans and pose a great risk of accidents that may occur due to mistakes made by operators. According to the mentioned contents, the non-negligible effects of noise on the physical and mental health of people in the work environment, the complexity a...

Journal: :International journal of occupational medicine and environmental health 2015
Mohammad Reza Monazzam Elham Karimi Majid Abbaspour Parvin Nassiri Lobat Taghavi

OBJECTIVES Spatial assessment of traffic noise pollution intensity will provide urban planners with approximate estimation of citizens exposure to impermissible sound levels. They could identify critical noise pollution areas wherein noise barriers should be embedded. The present study aims at using the Geographic Information System (GIS) to assess spatial changes in traffic noise pollution in ...

Journal: :بهداشت و توسعه 0
رضا حسین پور کاظم جعفری نعیمی محمدرضا قطبی راوندی

background: one of the most widely used equipments in harvesting hay and grains are four wheel mowers. the aim of the present study was to determine the levels of noise exposure in drivers and bystanders in different states, speeds and gear of four wheel mowers (bcs model 622).   methods: the iso 5131 and iso 6814 standards were used to assess noise exposure in drivers and bystanders, respectiv...

Journal: :international journal of occupational hygiene 0
seyedehzahra jalilzadeh islamic republic of iran broadcasting university, tehran, iran. mohammad asgari islamic republic of iran broadcasting university, tehran, iran. mohammadebrahim sadeghi islamic republic of iran broadcasting university, tehran, iran.

acoustic experimental data of irib (islamic republic of iran broadcasting) server room was taken to measure the acoustic noise characteristics of frequency and sound pressure level (spl). the purposes of this paper are measuring the noise pollution and its evaluation through the regulations. the measurements were taken in two stages. the first one was taken at 10 points by sound investigator 22...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید