نتایج جستجو برای: equivalent sound level

تعداد نتایج: 1290264  

Journal: :international journal of occupational hygiene 0
parvin nassiri department of occupational health, school of public health, tehran university of medical sciences, tehran, iran. hamidreza heidari research center for environmental pollutants, qom university of medical sciences, qom, iran. monireh khadem department of occupational health, school of public health, tehran university of medical sciences, tehran, iran. hoda rahimifard department of occupational health, school of public health, qom university of medical sciences, qom, iran. elham rostami department of epidemiology and biostatistics, school of public health, tehran university of medical science, tehran, iran.

noise is a common and widespread problem in workplaces. noise can lead to hearing loss, hypertension, nervous and mental disorders, annoyance and stress, sleep disturbance, negative impact on productivity and working capacity. the undesirable effects of noise on an individual or group are called annoyance. some personal and social characteristics can affect on annoyance. this study was aimed to...

Journal: :international journal of occupational hygiene 0
damon ketabi department of occupational health, yazd university of medical sciences, yazd, iran. abalfazl barkhordari department of occupational health, yazd university of medical sciences, yazd, iran.

the aim of the present study was to examine the rate of noise induced hearing loss in a group of punching and cutting section and other occupational groups workers and its relation with sound pressure levels, age and work history. this descriptive, cross-sectional study included 245 workers of the punching and cutting section and other occupational groups of an iranian axial parts factory in 20...

Ahmad Reza Yari, Esmaeil Idani, Gholamreza Goudarzi, Mehdi Vosoughie, Mohammad Javad Mohammadi, Mohammad Sadegh Rezaie, Niloofar Mohamadrezai Esfarjani, Poya Mohammadian Geravand, Reza Malihi, Roghayeh Hayati, Sahar Geravandi,

Background & Aims of the Study: Among the environmental pollutions, noise pollution, due to the potential physiological and psychological effects on humans, is of a particular importance. Exposure to noise can result in hearing loss in citizens. Health risks from noise associated with road traffic. Noise health effects are the health consequences of elevated sound levels. This ...

Journal: :تحقیقات نظام سلامت 0
امین پراور کارشناس ارشد، گروه مهندسی محیط زیست، دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی، واحد علوم تحقیقات تهران، تهران، ایران محمد رضا منظم استاد، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشکاه علوم پزشکی تهران، تهران، ایران نبی اله منصوری دانشیار، گروه مهندسی محیط زیست، دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، تهران، ایران مسعود مطلبی کاشانی دانشیار، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی کاشان، کاشان، ایران

background : studies have shown that noise pollution has harmful effects on human health. the sound of traffic is the main source of noise pollution in cities. the purpose of this study was to determine noise pollution using a geographical information system (gis) in the main streets of kashan, iran. methods: in this study, 180 noise samples were collected from 20 regions of the main streets in...

Journal: :journal of biotechnology and health sciences 0
ahmad nikpey department of occupational health, qazvin university of medical sciences, qazvin, ir iran mehran ghalenoei department of occupational health, qazvin university of medical sciences, qazvin, ir iran; department of occupational health, qazvin university of medical sciences, qazvin, ir iran. tel: +98-2833328212, fax: +98-2833345862 ali safary variani department of occupational health, qazvin university of medical sciences, qazvin, ir iran hamed nadri department of occupational health, shahid beheshti university of medical sciences, tehran, ir iran

background noise at intensive care units (icu) has an adverse effect on patients and icu staff. there are some evidences that sleep, recovery from critical illness and average background noise in hospitals as recommended by the us environmental protection agency (epa) and world health organization (who) should not exceed 30 a-weighted decibel (dba) and peaks during night time should be less tha...

Journal: :تحقیقات نظام سلامت 0
رستم گل محمدی دانشیار، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت و مرکزتحقیقات علوم یهداشتی، دانشگاه علوم پزشکی همدان، همدان، ایران محسن علی آبادی مربی، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران

background: hospital is a place to provide medical services. it is affected by noise pollution sources that can be associated with negative impacts on health and comfort status of the staff members and patients. the aim of this study was to measure noise levels in different wards of hospitals and to determine the irritation caused by noise among the hospital staff members in hamadan, iran. meth...

Background: Noise pollution is one of the common physical harmful factors in many work environments. The current study aimed to assess the personal and environmental noise level and project the sound map of an Iranian tire manufacturing complex using Surfer V.14 and Noise At Work tools. Materials and Methods: This descriptive study was conducted in the curing hall [including curing, sandblast,...

ژورنال: سلامت کار ایران 2013

  Background and Objective : Noise is considered as a common occupational health hazard in a wide range of occupational settings including oil and gas industries and related companies. This research aimed to assess the environmental noise and personal exposure in a petrochemical plant.   Method: First, environmental noise measurement was performed as recommended by ISO9612 (1997) and next, shor...

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