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:

1970-07-01

Pagination or Media Count:

12.0

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