original article   extended exposure to noise can cause permanent hearing damage. this study aimed to determine the incidence time of hearing loss and its effective factors in workers exposed to noise. this retrospective cohort study, was conducted on a total of 273 workers in various sectors of kerman copper by-industries co. their hearing status and the incidence of hearing loss (hearing thre...

Published articles have been reprinted with the permission of the copyright holders. All illustrations are made by the author. Abstract i Abstract Understanding speech in the presence of background noise can be difficulty and even more so if you suffer from a hearing loss. Although speech understanding depends on hearing acuity, the individual capacity to perform higher-order Working Memory (WM...

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...

regardless of severity, earlier intervention to correct hearing loss in children improves speech development and conversational abilities. a cross-sectional study was performed on 230 neonates who were at risk of hearing loss in tehran university of medical sciences hospitals between september 2000 and february 2002. hearing was examined before the 3rd month by auditory brainstem responses (abr...

The classic view of sensorineural hearing loss (SNHL) is that the "primary" targets are hair cells, and that cochlear-nerve loss is "secondary" to hair cell degeneration. Our recent work in mouse and guinea pig has challenged that view. In noise-induced hearing loss, exposures causing only reversible threshold shifts (and no hair cell loss) nevertheless cause permanent loss of >50% of cochlear-...

Introduction: Children learn to communicate by hearing sounds. If there is hearing loss, the cognitive and speaking abilities and language learning will deteriorate. Early detection and intervention are important factors in the successful treatment of hearing loss in children. Hearing loss (HL) is divided into two main groups: conductive hearing loss (CHL) and sensorineural hearing loss (SNHL)...

conclusions the assr can accurately predict the degree and configuration of hearing loss and discriminate the normal hearing from mild or moderate hearing loss and mild from moderate hearing loss, except for 500 hz. the air-conducted assr could not define the type of hearing loss. results the assr accurately estimates the behavioral thresholds as well as flat and sloping configurations. there w...

Introduction: A common cause of conductive hearing loss in young children is otitis media, which when chronic or recurrent can effect speech and language development. However, little is known about the effects of such conductive loss on resting activity levels in the auditory system. Hypothesis: Conductive hearing loss will change spontaneous activity levels at the inner hair cell synapse, and ...

Deficits in central auditory processing may occur in a variety of clinical conditions including traumatic brain injury, neurodegenerative disease, auditory neuropathy/dyssynchrony syndrome, neurological disorders associated with aging, and aphasia. Deficits in central auditory processing of a more subtle nature have also been studied extensively in neurodevelopmental disorders in children with ...