Accession Number : AD0693261

Title :   REAL-EAR SOUND ATTENUATION CHARACTERISTICS OF CBS LABORATORIES' MARK II EARPHONE INCLOSURES,

Corporate Author : ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER ALA

Personal Author(s) : Camp,Robert T. , Jr. ; Kovacs,Ronald F.

Report Date : JUL 1969

Pagination or Media Count : 28

Abstract : The real-ear attenuation characteristics of the CBS Laboratories' MARK II earphone inclosures were determined by standard procedures and equipment. The inclosures were mounted in an Army APH-5 helmet. The results of the tests show that the MARK II earphone inclosures do improve the attenuation characteristics of the APH-5 at frequencies from 75 to 500 Hz. (Author)

Descriptors :   (*AVIATION PERSONNEL, HEARING), (*HEARING, PROTECTION), (*EARPHONES, ACOUSTIC PROPERTIES), ATTENUATION, THRESHOLDS(PHYSIOLOGY), AUDIOMETRY, INSTALLATION, HELMETS

Subject Categories : Personnel Management and Labor Relations
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE