Human Response to Several Impact Acceleration Orientations and Patterns.

There is considerable indicatiou that the head wl present a problem in tolerance wo impaot accelration, patterns as more severe expoures are invetatigated. There is. however. no basis in theso results for a fore-mstof any probatble or aluolute uzjus level.Preliminary results af a mnathemnatical analysts have beem presented, and the ttends indicatethat it h desirable to attenuate high.frrqmeney owiipcaents of the ac~ cdc ration Pulse in impact protectin. The pow r density spectrum of the iriput Ar, StionS hawe been presentesi 2nd discwed'as a method -I of approaching the problem of de-enmining th~e tole. abltyo an arbitrary acceleration. paitern. .-