Although flight helmets selected for Navy use may possess exceptionally good noise attenuation qualities, maximum attenuation may not always be realized when the helmet is worn, particularly if the helmet does not fit. The lack of a standardized procedure for fitting flight helmets often results in a poor compromise that sacrifices noise exclusion for comfort. A procedure that involves the use of a noise source and an automatic recording audiometer has been developed as an aid in the fitting process. The noise source allows the aviator to detect acoustical leakage around his ears so that a better fit can be effected. Masked hearing threshold levels obtained with the helmet's earphones may be used to demonstrate improved performance. (Author)
A Technique for Optimal Fitting of Flight Helmets
1970
12 pages
Report
No indication
English
Aerodynamic forces on flight crew helmets
AIAA | 1988
|Aerodynamic forces on flight crew helmets
AIAA | 1989
|Online Contents | 1994