نتایج جستجو برای: noise control methods
تعداد نتایج: 3072762 فیلتر نتایج به سال:
Background and aims: The power plants, including important industry of the country in which a large number of noise sources which workers are exposed with harmful levels occupational noise. The aim of this study was designing enclosures to noise control in the feed water pumps in a power plant. Methods: This cross-sectional study and their Interventional plants were done on the ground floor ...
in spite of the existing reports on behavioural and biochemical changes related to the cerebellum due to noise stress, not much is known about the effect of noise stress on the neuronal changes in the cerebellum. the present study aims at investigating the effects from one week noise exposure on granule cell number and purkinje cell volume within the neonate rat cerebellum. 15-day-old male wist...
background acoustic trauma is an injury to the hearing mechanisms in the inner ear due to excessive noise. this injury is the most prevalent cause of sensorineural hearing loss in humans, especially from occupational exposure. previous studies have shown the essential role of free radical formation in the inner ear hearing loss caused by acoustic trauma. objectives this study was performed to d...
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...
Background and Aim: Occupational exposure to noise in the workplaces is a significant health problem and cardiovascular disease is one of the most important and common non-communicable diseases and one of the main causes of premature death. In addition to hearing impairments, noise as a stressor may cause cardiovascular problems, high blood pressure, nerve stimulation, stress and hormonal dis...
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 ...
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