نتایج جستجو برای: combined noise
تعداد نتایج: 563331 فیلتر نتایج به سال:
Background: It is well known that shift work produces fatigue. This effect is enhanced in seniors and could be potentiated by physical and psychosocial job demands. The aim of this study was to investigate the combined effects of work-related risk factors, age and shift work on fatigue. Materials and methods: The field study was performed based on a questionnaire about sleep characteristics, e...
Introduction: Noise is an environmental stressor and can cause or exacerbate mental disorders along with other stressors, and even affect the individual performance in certain conditions. The aim of this study was to evaluate the combined effects of noise and smoking on cognitive performance of the workers in an automotive industry. Methods: This is a descriptive-analytical study with cross-se...
Background: Ototoxic chemicals can impair the sense of hearing and balance. In the past decades, the ototoxicity of solvents and their interaction with noise have become evident. This study has been carried out in the shoe manufacturing factory in Tehran (Iran) with the aim of evaluating the combined effects of noise and toluene on the workers' hearing. Materials and Methods: This cross-sect...
This paper presents a combined active noise control and noise reduction scheme for hearing aids to tackle secondary path effects and effects of signal leakage through the fitting. While such leakage contributions and the secondary accoustic path from the reciever to the tympanic membrane are usually not taken into account in standard noise reduction systems, they appear to have a non-negligible...
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...
growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید