Uncomplicated, inexpensive intercom protects head, face, and hearing. Adaptation of highly suitable stock helmet and face shield unit to stock intercom headset provided ideal unit, allowing wearer total use of hands and body while protecting head, face, and hearing. Unit allows wearer to work effectively, efficiently, and safely while communicating from remote areas that require special precautions. Total cost of fabricating unit, using stock parts and including labor, less than $100.
Communications Headgear With Protective Features
NASA Tech Briefs ; 9 , 2
1985-10-01
Miscellaneous
No indication
English
Engineering considerations in the design of protective headgear
Automotive engineering | 1978
|On the Use of the Head Injury Criterion (HIC) in Protective Headgear Evaluation
SAE Technical Papers | 1975
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