Accession Number : AD0711659

Title :   AUDIOMETER ATTENUATOR CALIBRATION METHOD.

Descriptive Note : Final rept. 15 Oct 69-15 Apr 70,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : Brogan,F. A.

Report Date : JUL 1970

Pagination or Media Count : 12

Abstract : The implementation of standards for audiometers--together with a general upgrading of those for audiometer calibration--requires calibration checks of the steps of the audiometer hearing-level attenuator. The aim of the study was to determine the feasibility of using transformer and common base preamplifier impedance-matching, in conjunction with laboratory voltmeters or sound-level meters, to detect the very-low-level electrical signals from the audiometer. Additional applications of this device are suggested. (Author)

Descriptors :   (*AUDIOMETRY, INSTRUMENTATION), (*ATTENUATORS, CALIBRATION), FEASIBILITY STUDIES, IMPEDANCE MATCHING, PREAMPLIFIERS, SIGNAL-TO-NOISE RATIO, DETECTION, MEASURING INSTRUMENTS

Subject Categories : Medicine and Medical Research
      Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE