noise induced hearing loss (nihl) is one of the most important occupational disease worldwide. nihl has been found potentiate by simultaneous carbon monoxide (co) exposure. free radicals have been implicated in cochlear damage resulted from the exposure to noise and due to the co hypoxia. this study examined whether α-tocopherol administration, as a free radical scavenger, causes the attenuatio...

Approved for public release; distribution is unlimited. In this study, we have evaluated peer-reviewed publications and contracted reports to provide an overview of what is known about auditory processing by fishes and the behavioral and physiological effects of various noise stimuli as documented by the best and most appropriate studies. We include reviews of work on both cartilaginous (sharks...

Listeners in complex auditory environments can benefit from the ability to use a variety of spatial and spectrotemporal cues for sound source segregation. Probing these abilities is an essential part of gaining a more complete understanding of why listeners differ in navigating the auditory environment. Two fundamental processes that can impact the auditory systems of individual listeners are a...

background: lead still remains an important problem for poor, inner-city, ethnic minority children, with a particular emphasis on lead paint and dust. in egypt, there is no national survey about the prevalence of elevated blood lead level among children. objective: to assess the environmental lead level as well as to determine blood lead level among primary school children and find out its rela...

When the e a r i s stimulated by high-intensity lowfrequency sounds by means of ordinary earphones a sound p res su re is reached were tacti le receptors a r e stimulated. Different attempts have been made to establish the audiometric threshold of this tactile sensation. During pure-tone audiometry i t was observed that some severely hard of hearing and profoundly deaf subjects could give three...

Mammals exposed to loud aerial sounds exhibit temporary threshold shifts (TTS) that are linearly related to increases of sound pressure above baseline hearing levels. It was unknown if this relationship held true for aquatic ectotherms such as fishes. To test this linear threshold shift hypothesis (LINTS) in fishes, we examined the effects of increased ambient sound on hearing of two species di...

Subjects receiving treatment with ototoxic agents were evaluated concurrently with conventional and high-frequency (> or = 8 kHz) behavioral threshold measures and with ABR to click and to 8, 10, 12, and 14 kHz tone-burst stimuli. Behavioral threshold data revealed ototoxic change in 51 percent of ears evaluated. Of these ears demonstrating behavioral change, 90 percent revealed concurrent ABR ...