نتایج جستجو برای: noise

تعداد نتایج: 194715  

Journal: :تحقیقات نظام سلامت 0
رستم گلمحمدی دانشیار، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت و مرکز تحقیقات علوم بهداشتی، دانشگاه علوم پزشکی همدان، همدان حیدر محمدی دانشجوی کارشناسی ارشد، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران هادی بیات دانشجوی کارشناسی ارشد، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران علیرضا سلطانیان استادیار، گروه آمار زیستی، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران.

background and aims: since using city power for welding process is not allowed, diesel generators are used as a power supply in construction industries. they could be introduced as a main source of noise pollution. the purposes of this study were to assess and control noise pollution produced by construction diesel generators in hamadan, iran. methods: in this descriptive, cross-sectional study...

Journal: :international journal of occupational hygiene 0
mehran shesh baradaran department of environmental engineering, school of environment and energy, science and research branch, islamic azad university, tehran, iran parvin nassiri professor, department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran mohammad reza monazzam esmail pour professor, department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran

original article     the aim of this study was to design and build a software for noise propagation prediction (indoor and from indoor to outdoor spaces) which is being commonly used in industry.  in this regard, firstly a mathematical complex model was created based on existing relationships about noise propagation in indoor spaces and transmission through the walls and propagation in outdoor ...

Convolutional neural network is one of the effective methods for classifying images that performs learning using convolutional, pooling and fully-connected layers. All kinds of noise disrupt the operation of this network. Noise images reduce classification accuracy and increase convolutional neural network training time. Noise is an unwanted signal that destroys the original signal. Noise chang...

ژورنال: مجله طب نظامی 2019

Background and Aim: Combined exposure to noise and temperature can affect the neurophysiological responses of the office staff. The present study was done to investigate the impacts of combined exposure to noise and low air temperature on physiological responses and environmental comfort. Methods: In this experimental study, the studied population included the students who were randomly selecte...

Journal: :auditory and vestibular research 0
yones lotfi department of audiology, university of social welfare and rehabilitation sciences, tehran, iran samira salim department of audiology, university of social welfare and rehabilitation sciences, tehran, iran saiedeh mehrkian department of audiology, university of social welfare and rehabilitation sciences, tehran, iran tayebeh ahmadi department of audiology, university of social welfare and rehabilitation sciences, tehran, iran akbar biglarian department of biostatistics, university of social welfare and rehabilitation sciences, tehran, iran

background and aim: different tests have been developed to evaluate reduced ability of speech perception in noise, and the words-in-noise test is one of the easiest ones in terms of speech materials. this study aimed to develop and determine the validity and reliability of the persian version of the words-in-noise (win) test for 7 to 12-year-old children. methods: this research is a tool-making...

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: :تحقیقات نظام سلامت 0
رستم گلمحمدی دانشیار گروه مهندسی بهداشت حرفه‎ای، دانشکده بهداشت و مرکز تحقیقات علوم بهداشتی، دانشگاه علوم پزشکی همدان، همدان، ایران محسن علی آبادی ستادیار گروه مهندسی بهداشت حرفه‎ای، دانشکده بهداشت، دانشگاه علوم پزشکی و خدمات بهداشتی درمانی همدان، همدان، ایران ابراهیم درویشی عضو مرکز تحقیقات بهداشت محیط و مربی گروه مهندسی بهداشت حرفه‎ای، دانشکده بهداشت، دانشگاه علوم پزشکی و خدمات بهداشتی درمانی کردستان، سنندج، ایران

background: in the steel industry, coke-fueled furnaces are used for smelting iron ore to produce cast iron are considered as sources of annoying noise.this study aims to evaluate the noise pollution blast furnace and sound source characteristics in order to present noise control measures in the steel industry. methods: measurement of noise level and its frequency analysis was performed using s...

Journal: :international journal of occupational and environment medicine 0
sa moussavi-najarkola department of occupational health, school of medical sciences, tarbiat modares university, tehran a khavanin department. of occupational health, school of medical sciences, tarbiat modares university, tehran r mirzaei department of occupational health, health promotion research center, zahedan university of medical sciences, zahedan m salehnia department of anatomical sciences, school of medical sciences, tarbiat modares university, tehran a muhammadnejad cancer research center, iran cancer institute, tehran university of medical sciences, tehran m akbari department of audiology, school of rehabilitation, iran university of medical sciences, tehran

background: noise-induced hearing loss (nihl) is one of the most common occupational illnesses. most of the studies on nihl were conducted at high noise levels that people are rarely exposed to but in industries. the function of the outer hair cells (ohcs) is impaired after exposure to industrial noise. distortion product otoacoustic emissions (dpoaes) are useful in examination of noise-induced...

Journal: :jentashapir journal of health research 0
malek kenani department of anatomy, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran asghar rajabzadeh department of anatomy, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran ghasem saki physiology research center, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran ali khodadadi department of immunology, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran alireza sarkaki physiology research center, school of medicine, ahvaz jundishapur university of medical sciences, ahvaz, ir iran alborz jafai department of anatomy, school of medicine, abadan university of medical sciences, abadan, ir iran

conclusions it seems that noise pollution has harmful effects on the fertility of males. also these findings may suggest the use of a natural curative approach rather than pharmaceutical drugs to optimize both neuroendocrine gonadal axis and testicular integrity induced by pathogenesis stress, and enhance fertility capacity in men. background this study was conducted to examine the efficacy of ...

Journal: :health scope 0
sedigheh atrkar roshan department of economic, university of alzahra, tehran, ir iran omran ahmadi department of sciences of occupational health, tarbiat modarres university, tehran, ir iran; department of sciences of occupational health, tarbiat modarres university, tehran, ir iran. tel: +98-9144241240

conclusions since traffic noise pollution is a high cost for tabriz residents, extensive preventive measures and comprehensive control programs by managers and city authorities as unavoidable necessities are suggested. the measures have to be taken by urban managers and decision-makers to reduce the health impact of traffic noise on tabriz residents. background noise pollution is one of the mos...

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