Accession Number : AD0693261

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

Corporate Author : ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL

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

PDF Url : AD0693261

Report Date : Jul 1969

Pagination or Media Count : 23

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.

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

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE