The effect of high frequency sounds on hearing

All people who work in airline have annually medical examination included audiometry, because of common hearing Loss among them. Different reasons like decrease in blood supply of hair cells are considered for it. High frequency inverted curved in audiogram in 2-6 kHz that may be temporary or permanent. Hearing deficiency disturbed vocal communication. This article is a research in aviation medicine site with hearing, high frequencies and hearing keywords and recommended that personal who is in low and high frequency circumstance must be protected against its harmful effect to protect them from permanent or temporary effect in hearin.