Contemporary methodic approach to evaluation of acoustic load on civil aircraft crew members

Abstract

The article characterizes occupational factors including acoustic ones that influence work conditions of civil aircraft crew members, presents methodic basis to evaluate parameters of aviation noise inside cabin, with consideration of additional load from aviaheadsets. To specify scientifically based method for calculating acoustic load on civil aircraft crew members in cabins, the authors measured noise parameters inside cabins of aircrafts used at present in Russia, and noise-proof properties of domestic and foreign aviaheadsets. Normalized values suggested: equivalent level of A sound over a month (L_A,eq,m), over a year (L_A,eq,y); suggestions for reference values: equivalent level of A sound (L_A,eq,g), over an arbitrary period of piloting length (L_A,eq,T); coefficient of piloting load. Principles of these calculations are determined. The method is designed as an addition to sanitary rules and regulations 2.5.1.2423-08, determining hygienic requirements to work and rest conditions for civil aircraft pilots.