A DETERMINATION FOR THE NAVY OF ZERO HEARING LEVEL FOR SPEECH

Abstract

Twenty-three normal-hearing candidates for the Submarine Force were examined for Speech Reception Threshold (SRT) by speech audiometry using phonetically-balanced (PB) lists of monosyllables instead of the usual spondee words. Such PB words are felt to be considerably better in assessing the important frequency regions for daily speech communication, namely, 500-2000 cycles per second. The Navy threshold for SRT(PB) is 25 db sound pressure level re 0.0002 dyne/sq cm, or 6 db higher than the standard SRT(Spondees). A standard speech audiometer, now calibrated for spondees according to USA standards Institute specifications, can then be used with the PB lists by subtracting 6 db from the Hearing Level dial reading to arrive at the particular subject's SRT(PB).

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Document Details

Document Type
Technical Report
Publication Date
Jul 25, 1969
Accession Number
AD0697932

Entities

People

  • James F. Willott

Organizations

  • Naval Submarine Medical Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Audiometry
  • Biomedical Research
  • Classification
  • Connecticut
  • Engineering
  • Handbooks
  • Navy
  • Security
  • Sound Pressure
  • Specifications
  • Speech
  • Standards
  • Submarine Bases
  • Submarines
  • Systems Engineering
  • Word Lists

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Mathematics or Statistics
  • Speech Processing/Speech Recognition.