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
Personal Author(s):
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.
Descriptors:
Subject Categories:
- Medicine and Medical Research
- Electrical and Electronic Equipment