Accession Number : ADD002000
Title : Adjustable Earmuffs.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Desimone,David N
Report Date : 11 Feb 1975
Pagination or Media Count : 5
Abstract : The patent concerns an ear protecting headgear having means for adjusting the pressure of an earmuff seal against the head of a wearer useful in high noise environments. In a headgear such as a helmet the apparatus includes a pair of cords connected at their respective one ends to a pair or resilient supports containing earmuffs, and at their other ends to a single take-up device mounted on the helmet. Manual manipulation of the take-up device selectively and simultaneously shortens the extensible length of both cords moving both earmuffs inwardly toward a wearer's ears, adjusting the earmuff seal pressure against the wearer's head and effectuating varying degrees of ambient sound attenuation.
Descriptors : *Patents, *Ear protectors, *Headgear, Noise, Protection, Helmets, Attenuation, Seals(Stoppers)
Subject Categories : Protective Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE