نتایج جستجو برای: continuous noise.

تعداد نتایج: 447974  

Journal: :medical journal of islamic republic of iran 0
zahra jafari rehabilitation research center (rrc), department of basic sciencesin rehabilitation, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)سازمان های دیگر: rehabilitation research center (rrc) shaghayegh omidvar rehabilitation research center, department of audiology, school ofrehabilitation, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences)سازمان های دیگر: rehabilitation research center fateme jafarloo rehabilitation research center, department of audiology, school ofrehabilitation, tehran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences)سازمان های دیگر: rehabilitation research center

background: according to previous studies, most of the speech recognition disorders in older adults are the results of deficits in audibility and auditory temporal resolution. in this paper, the effect of ageing on timecompressed speech and auditory temporal resolution by word recognition in continuous and interrupted noise was studied. methods: a time-compressed speech test (tcst) was conducte...

Journal: :iranian red crescent medical journal 0
s a moussavi-najarkola depu~togncowpowk~a iooalthmawhoocooomeoocmmd{cimnsg{mnwesniuurooeurmdu~mwewiv}r{}}})(tmu), jalal aal ahmad highway, nasr bridge, iran 982182883849, [email protected] a khavanin depu~togncowpowk~a iooalthmawhoocooomeoocmmd{cimnsg{mnwesniuurooeurmdu~mwewiv}r{}}})(tmu), jalal aal ahmad highway, nasr bridge, iran 982182883849, [email protected]; depu~togncowpowk~a iooalthmawhoocooomeoocmmd{cimnsg{mnwesniuurooeurmdu~mwewiv}r{}}})(tmu), jalal aal ahmad highway, nasr bridge, iran 982182883849, [email protected] r mirzaei dept. of occupational health, health promotion research center, zahedan university of medical sciences (zums), iran

background outer hair cells' (ohcs') dysfunctions as the extent of temporary and permanent threshold shifts (tts and pts) and cochlear damage were assessed in rabbits exposed to continuous noise methods twelve new zealand white rabbits were studied in noise (n) (n=6; exposed to continuous noise; 95 db spl, 500-8000 hz for 8 h per day during 5 consecutive days) and control (c) (n=6; no...

Journal: :journal of advances in computer research 2010
pooya davari

in many active noise control (anc) applications, an online secondary pathmodelling method that uses a white noise as a training signal is required. this paperproposes a new feedback anc system. here we modified both the fxlms and thevss-lms algorithms to raised noise attenuation and modelling accuracy for theoverall system. the proposed algorithm stops injection of the white noise at theoptimum...

قضایی, صمد, معتمدزاده, مجید,

This study was conducted to determine the combined effects of noise and shift work on physiological parameters including body temperature, heart rate and blood pressure. This study was performed in a chemical industry in Tehran in 1993.           The workers’ physiological parameters was recorded at the beginning and at t...

 Background: According to previous studies, most of the speech recognition disorders in older adults are the results of deficits in audibility and auditory temporal resolution. In this paper, the effect of ageing on timecompressed speech and auditory temporal resolution by word recognition in continuous and interrupted noise was studied. Methods: A time-compressed speech test (TCST) w...

Background and purpose: Irreversible damage to the inner ear is known as noise-induced hearing loss (NIHL). Exposure to excessive noise can affect the expression of genes in molecules involved in development of NIHL. SLC26A4 gene or PDS is responsible for causing both syndromic and non-syndromic deafness and is located at DFNB site. The aim of this study was to investigate the expression level ...

احمدی آسور, اکبر, نوری, کرامت الله, گلبابایی, فریده, نصیری, پروین ,

This study has been carried out in two shoe-making factories in Tehran with the aim ofevaluating the cobined effects of noise and toluene on the workers' hearing. Sixty four workers were assigned to three groups according to their exposure to noise andtoluene. 33 were exposed to noise (group 0), 5 to toluene (group 1) and 26 to noise andtoluene (group 2).The concentration were measured in the ...

Journal: :international journal of occupational and environment medicine 0
p nassiri department of occupational health, school of public health, tehran university of medical sciences, tehran, iran m monazam department of occupational health, school of public health, tehran university of medical sciences, tehran, iran b fouladi dehaghi department of occupational health, school of public health, tehran university of medical sciences, tehran, iran l ibrahimi ghavam abadi department of environmental management, islamic azad university, science and research branch, khouzestan, iran sa zakerian department of occupational health, school of public health, tehran university of medical sciences, tehran, iran k azam epidemiology and biostatistics department, school of public health, tehran university of medical sciences, tehran, iran

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 healt...

Journal: :pollution 2015
rebeca bouzón angel m costa gholamreza roshan j.a. orosa

noise is one of the main parameters to be considered to achieve a healthy indoor ambience in ferries. therefore, the noise standards need to be more specialized and specifically based on real sampled data and case studies. in the present research, the noise levels in a ship, under different working conditions, were sampled and compared with those specified in the new and old standards. an initi...

In many active noise control (ANC) applications, an online secondary path modelling method that uses a white noise as a training signal is required. This paper proposes a new feedback ANC system. Here we modified both the FxLMS and the VSS-LMS algorithms to raised noise attenuation and modelling accuracy for the overall system. The proposed algorithm stops injection of the white noise at the op...

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