STUDIES IN SHORT DURATION AUDITORY FATIGUE. 5. AN INVESTIGATION OF THE SPREAD OF FATIGUE WITHIN NARROW FREQUENCY LIMITS

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Abstract:

If a tone is sounded in one ear and immediately a second tone is sounded, there is a decrease in sensitivity to the second tone. A 1000 cps. tone was presented to five observers for 435 msec. followed by a silent interval of 35 msec., then a test tone of 50 msec. was presented. The first tone was given at sensation levels of 30-90 db. in 10 db. steps. Frequencies of the second tone were varied randomly from 900-1100 cps. The greatest decrement in sensitivity was found for test tones from 990-1010 cps. in the form of a broad spread at the higher sensations levels. At the lower sensation levels only a slight effect was found. Author

Author(s):
Rawnsley, Anita I. ; Harris, J. D.
Author Organization(s):
NAVAL MEDICAL RESEARCH LAB NEW LONDON CT
Supplementary Note:
NMRL rept. no. 9, v11 n16, 16 may 1952.
Pagination:
0016

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
199, V-11-N16
Project Number(s):
NAVMED-NM-003-041.34.04
Monitor Series:
199, NMRL
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_5_Command and Control; JCA_5.3_Planning; JCA_6_Net Centric
Modernization Areas:
Microelectronics
Communities of Interest:
Biomedical
Descriptor(s):
*AUDITORY PERCEPTION, *PITCH DISCRIMINATION, AUDIO FREQUENCY, AUDIOMETRY, FATIGUE(PHYSIOLOGY), HEARING, PSYCHOACOUSTICS, SENSITIVITY
Field(s)/Group(s):
Anatomy and Physiology
Report Date:
1952 May 16