Anzeige
Erschienen in:
2015 | OriginalPaper | Buchkapitel
67. An Experimental Study of the Effects of Low Barometric Pressure on Human Hearing Level
verfasst von : Junmin Du, Weiyu Sun, Huajun Xiao, Wangqiang Xu
Erschienen in: Proceedings of the 15th International Conference on Man–Machine–Environment System Engineering
Verlag: Springer Berlin Heidelberg
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
The goal of this study is to explore the effects of low barometric pressure on human hearing level in aviation environment. A hypobaric chamber was used to simulate low barometric pressure condition in aviation. 7 participants were exposed to the hypobaric chamber at 5 simulated altitudes (1500, 2400, 3000, 4000, and 5000 m). 5 frequencies pure tones (50, 100, 400, 1000, and 8000 Hz) were played at each altitude. The hearing thresholds were recorded. It was found that the hearing thresholds ascended with the increasing of simulated altitude under all the frequencies pure tones. There were significant differences of the hearing thresholds between altitudes mostly (P < 0.05). It could be concluded that low barometric pressure had negative effects on hearing threshold significantly. The hearing level decreased with the altitude raising. This study is useful for the pressure design, sound design, and audition protecting in low barometric pressure condition.