Physical discomfort of earplug is a common complaint, so much it jeopardizes the health and safety workers, resulting in frequent noncompliance to proper wearing earplugs. A pressing need thus arises understand underlying mechanics for interaction earplugs with earcanal walls. An idealized cylindrical geometry first treated computational analytical modeling predict pressure induced by roll-down...

Hearing protection devices (HPDs) play a significant role in protecting workers from occupational noise-induced hearing loss. Individual HPD fit-testing estimates the amount of protection, or attenuation, that an individual achieves from a given HPD as it is worn. Results from a single fit-test may not be representative of real-world HPD performance over time, however, due to inconsistency in h...

abstract background: sleep is one of the basic human needs and sleep deprivation causes numerous undesirable effects on the human body and mind, especially in the intensive care unit (icu) patients. it seems that noise and light are important environmental factors interrupting sleep in these patients. this study was carried out to determine the effect of earplugs and eye mask on iranian patient...

INTRODUCTION Although quarry operations have high economic significance, the effects they cause to the workers in terms of excessive noise production cannot be overlooked. This cross-sectional study assessed the extent of noise exposure and its influence on hearing capabilities among quarry workers in Ashanti region. METHODS The study involved 400 workers randomly selected from five quarries ...

Biological time series datasets provide an unparalleled opportunity to investigate regional and global changes in the marine environment. Baleen whales are long-lived sentinel species integral part of ecosystem. Increasing anthropogenic terrestrial activities alter ocean systems, such alterations could change foraging feeding behavior baleen whales. In this study, we analyzed δ13C δ15N whale ea...