نتایج جستجو برای: hearing in noise
تعداد نتایج: 17014750 فیلتر نتایج به سال:
introduction: after presbycusis, noise-induced hearing loss is the second most common cause of acquired hearing loss. numerous studies have shown that high-intensity noise exposure increases free radical species; therefore, use of antioxidants to detoxify the free radicals can prevent cellular damage in the cochlea. we studied the potential hearing protective effect of different doses of ascorb...
background : noise exposure is the most frequent occupational factor which may increase the risk of work-related injuries. the purpose of this study was to estimate the association between occupational injuries and noise exposure as well as hearing loss. methods : this study was conducted from april 2008 to march 2009 on 1062 workers in the tabriz tractor manufacturing plant. sound pressure lev...
Background: Many elderly individuals complain of difficulty in understanding speech in noise despite having normal hearing thresholds. According to previous studies, auditory training leads to improvement in speech-in-noise perception, but these studies did not consider the etiology, so their results cannot be generalized. The present study aimed at investigating the effectiveness of envelope-b...
Introduction: The sound pressure levels caused by work environment noise, along with the effects and ways of reducing it, are one of the most important issues in the manufacturing industry. Noise is the most common pollutant in the industrial environment, which can cause many disorders in various organs of the body, such as the auditory and vascular systems. This study aimed to investigate the ...
magnetic resonance imaging (mri) is a notable medical imaging technique that makes of phenomenon of nuclear magnetic resonance. because of the resolution and the technology being harmless, mri has considered as the most desirable imaging technique in clinical applications. the visual quality of mri plays an important role in accuracy of medical delineations that can be seriously degraded by exi...
Background : Noise-induced hearing loss is among the most common cause of occupational-related hearing loss. Nowadays, noise-induced hearing loss is a disastrous event of industrial world that may influence all races, ethnics and age groups. Methods : This cross sectional study was performed on 100 workers exposed to noisy environment (greater 85db) in Azmayesh factory. Having excluded all con...
Abstract Background: Noise-induced hearing loss is on of the most important disease which may lead to some disturbances in workers' safety and performance. This study was conducted to evaluate the frequency of hearing loss among the workers of a uranium mine in the central region of Iran. Methods: This was a cross-sectional descriptive study. Measurements were performed in A-weighting scale ...
Introduction: In the present study, was performed to investigate the relationship between toluene(1000 ppm), noise, toluene and toluene along with noise (frequencies 250- 2000 Hz) per auditory Brain Stem response (ABR) on rabbits in which being exposed to this contaminants. Materials & Methods: Three months old, male adult white New Zealand rabbits (1400-1700 g body weight) were used throug...
background: previous studies have shown that interaural-time-difference (itd) training can improve localization ability. surprisingly little is, however, known about localization training vis-à-vis speech perception in noise based on interaural time difference in the envelope (itd env). we sought to investigate the reliability of an itd env-based training program in speech-in-noise perception a...
Introduction: Noise is considered as a physical hazard that seriously threatens human health in industrial environments. It is also the most important and influential harmful physical factor in workplace that can affect the individuals’ lifestyle and job. The present study aimed to determine the effects of chronic noise on the hearing ability as well as psychological and mental attitudes of wor...
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