Real-world levels of attenuation from hearing protection devices are usually much lower than the rated values obtained under near-ideal circumstances. The shortfall is even more extreme for earplugs than it is for earmuffs, primarily because of the complicated process of fitting the plugs within the ear canal. This study examines the use of a commercially-available lubricant for hearing aids to...

The prevalence of noise-induced hearing loss (NIHL) in current motorcycle grand prix racers was investigated. A total of 44 riders was randomly recruited and underwent interview, otological examination and pure tone audiometry. The median age was 28 (range 18-37) years and median racing experience was 10 (range 2-21) years. Twenty riders (45%) had hearing losses greater than expected for age ma...

Background: A bright circumstance, cold temperature with loud noise where there are many activities around could influence baby’s sleep.Objective: This study aimed to identify the effect of using earmuffs and earplugs on physiological response preterm infants.Methods: crossover involved 15 medically stable infants treated in a closed incubator. It used consecutive sampling technique babies’ And...

As the number of electric vehicles increases, the impact of their charging on distribution networks is being investigated using different load profiles. Due to the lack of real charging data, the majority of these load impact studies are making assumptions for the electric vehicle charging demand profiles. In this paper a two-step modelling framework was developed to extract the useful informat...

INTRODUCTION Sleep deprivation is common in critically ill patients in the intensive care unit (ICU). Noise and light in the ICU and the reduction in plasma melatonin play the essential roles. The aim of this study was to determine the effect of simulated ICU noise and light on nocturnal sleep quality, and compare the effectiveness of melatonin and earplugs and eye masks on sleep quality in the...

colleagues [1] reporting that earplugs may be useful in the prevention of delirium in non-ventilated ICU patients. Unfortunately, they did not report any potentially negative effects of earplugs related to sensory deprivation for example, restlessness, discomfort, or anxiety. In non-ventilated critical care patients the combination of earplugs and eyemasks were effective to improve sleep [2], a...