DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD0744823
Title:
Pure-Tone Threshold with TDH-49 Earphones
Descriptive Note:
Progress rept. Jun 1971-May 1972
Corporate Author:
SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
Report Date:
1972-06-01
Pagination or Media Count:
16.0
Abstract:
Pure-tone thresholds of 24 normal-hearing listeners were determined at 11 audiometric frequencies on two TDH-49 and two TDH-39 earphones. Thresholds were recorded in decibels of sound pressure level, as measured with a National Bureau of Standards type 9-A earphone coupler. Threshold data were used to compute appropriate calibration values for audiometers with TDH-49 earphones, reference Appendix F of ANSI S3.6-1969.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE