نتایج جستجو برای: noise test

تعداد نتایج: 991260  

Journal: :The international journal of occupational and environmental medicine 2013
P Nassiri M Monazam B Fouladi Dehaghi L Ibrahimi Ghavam Abadi S A Zakerian K Azam

BACKGROUND Noise is defined as unwanted or meaningless sound that apart from auditory adverse health effects may distract attention from cues that are important for task performance. Human performance is influenced by many job-related factors and workplace conditions including noise level. OBJECTIVE To study the effect of noise on human performance. METHODS The participants included 40 heal...

رحیمی فروشانی, عباس, فلاح مدواری, روح اله, فلاح مدواری, علیرضا, لعل, فریدون, مجلسی, فرشته, منظم اسماعیل پور, محمد رضا,

Introduction: The use of hearing protective devices (HPDs) is the last way for noise control. It is important to know the information about the duration time using these devices to ensure protetion effectiveness. The aim of this study was to investigate the effect of increasing duration time of the using of the devices on hearing loss in tile industry workers with application of the BASNEF educ...

Journal: :IEICE Transactions 2011
HyeonUk Son Incheol Kim Sang-Goog Lee Jin-Ho Ahn Jeong-Do Kim Sungho Kang

This paper proposes a built-in self-test (BIST) scheme for noise-tolerant testing of a digital-to-analogue converter (DAC). The proposed BIST calculates the differences in output voltages between a DAC and test modules. These differences are used as the inputs of an integrator that determines integral nonlinearity (INL). The proposed method has an advantage of random noise cancelation and achie...

Introduction: Functional MRI methods have been used to study sensorimotor processing in the Spinal cord. However, these techniques confront unwanted contributions to the measured signal from the physiological fluctuations. For the spinal cord imaging, most of the challenges are consequences of cardiac and respiratory movement artifacts that are considered as significant sources of noise, especi...

Journal: :Brazilian journal of otorhinolaryngology 2015
Andressa Forlevise Sbompato Lilian Cassia Bornia Jacob Corteletti Adriane de Lima Mortari Moret Regina Tangerino de Souza Jacob

INTRODUCTION Individuals with the same ability of speech recognition in quiet can have extremely different results in noisy environments. OBJECTIVE To standardize speech perception in adults with normal hearing in the free field using the Brazilian Hearing in Noise Test. METHODS Contemporary, cross-sectional cohort study. 79 adults with normal hearing and without cognitive impairment partic...

اعتمادی نژاد , سیاوش, علی زاده , احمد, محمدیان , محمود, یزدانی چراتی , جمشید,

Background and purpose: Noise is one of the most harmful factors in the environment. It is also one of the harsh phenomenons in this century that people are exposed to. Exposure to noise higher than threshold limit value could cause some physical and mental disorders. High traffic flow due to recent increase in number of vehicles causes higher noise pollution. There are few studies regarding ...

جام بر سنگ, سارا , جعفری, محمد جواد , صارمی, مهناز , منظم, محمد رضا , ناصرپور, مهسا , پورآقا شاه‌نشین, حمیدرضا ,

Introduction: In the most industrial environment, workers are exposed to noise everyday. Exposure to this physical hazardous agent can cause immediate as well as delayed adverse effects. Cognitive performance decrement is one of the adverse effects of noise exposure which its main consequences is occupational accidents. This study attempted examine the effect of exposure to different levels of ...

Journal: :iranian journal of public health 0
m malakootian environmental health research center and dept. of environmental health engineering, school of publi m ahmadian social development & health promotion research center, kermanshah university of medical sciences, ke k yaghmaeian dept. of environmental health engineering, tehran university of medical sciences, tehran, iran sh dowlatshahi environmental health research center and dept. of environmental health engineering, school of publi mr ghotbi ravandi dept. of occupational health, kerman university of medical sciences, kerman, iran

background: the purpose of this research was to determine the traffic noise level and changes in the kerman city, southeast iran in recent years. methods: this cross-sectional study was carried out in 2008 to investigate the existing noise situation in kerman. sound levels (l max , l min , l eq , l 99 , l 90 , l 50 and l 10 ) were determined throughout 13 stations using sound level measurement ...

Journal: :Indian journal of physiology and pharmacology 1999
N Shankar N Awasthy H Mago O P Tandon

Environmental noise is a known stress, which induces alterations of various physiological responses in individuals exposed to it. Stress has been shown to cause changes in the perception of various sensations including pain and stress-induced analgesia has been observed following exposure to a diverse set of stimuli. To examine the algesic behavior of rats exposed to loud environmental noise, f...

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