conclusions the adoption of 85 dba as the permissible exposure limit has preserved hearing threshold level among participants at 3000 hz compared to those who embraced 90 dba. patients and methods this is an intervention study done on two automobile factories. there were 203 employees exposed to noise levels beyond the action level. hearing protection devices were distributed to reduce noise le...

Introduction: Hearing loss is one of the most common occupational diseases. In most workplaces, workers are exposed to noise and solvents simultaneously, so the potential risk of hearing loss due to solvents may be attributed to noise.  In this study we aimed to assess the effect of exposure to mixed aromatic solvents on hearing in the absence of exposure to hazardous noise.   Materials and Met...

the exposure to electromagnetic field emitted by mobile telephones is increasing rapidly worldwide that causes side effects, including thermal and non thermal side effects. ear proximity to electromagnetic source may lead to greater damage and side effects, including hearing loss. this study was performed to assess the chronic effect of exposure to electromagnetic field of mobile telephones on ...

ra (rheumatoid arthritis) is a chronic multisystem disease with a variety of systemic manifestations. one of these manifestations, is hearing disorder, so study of the relation between ra and hearing disorders is seem important. this was a case-control study which has done from december 2004 to august 2006. this study compared 50 patients with ra, with age, sex and job-matched as control. audio...

BACKGROUND This study examined the relative contribution of genetic and environmental effects on the air-conducted hearing threshold level (0.5-4 kHz) and speech recognition threshold level of the better ear as well as self-reported hearing in older women. METHODS Hearing was measured as a part of the Finnish Twin Study on Aging in 103 monozygotic (MZ) and 114 dizygotic (DZ) female twin pairs...

exposing the ear to an intense noise will probably cause to hearing loss. this loss may be temporary threshold shift (tts), permanent threshold shift (pts), or a combination of the two. the average audiograms for the 157 textile workers, exposed to an average 100 db (a) overall noise level, in 5 age groups indicated that the losses were most prominent for frequencies of 3 to 6 kc/s showing a pe...

INTRODUCTION Noise as a common physical hazard may lead to noise-induced hearing loss, an irreversible but preventable disorder. Annual audiometric evaluations help detect changes in hearing status before clinically significant hearing loss develops. This study was designed to track hearing threshold changes during 2-year follow-up among tile and ceramic workers. METHODS This follow-up study ...

Background: Hearing loss induced by noise is one of the well-known and main health problems of occupational exposures. As a result, the current study sought to examine the association between age, working experience, and smoking status and hearing loss among sugar factory workers. Materials and Methods: This cross-sectional study was conducted in 2016 among 270 workers of a sugar factory in Fa...