The Effect of Helmet Form on Hearing: Free-Field Thresholds

reportActive / Technical Report | Accession Number: AD0745121 | Open PDF

Abstract:

Audiometric threholds were determined for 12 subjects under three head conditions bareheaded, while wearing an M1 helmet, and wearing an experimental helmet. The thresholds were measured for seven tones 125, 250, 500, 1000, 2000, 4000 and 8000 Hz, at each of five angular orientations. Statistically noteworthy differences were studied for main effects and interactions. These appear to fall within the range of variation most people ordinarily experience on a day-to-day basis.

Author(s):
Randall, R. Bradley ; Holland, Howard H.
Author Organization(s):
HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD
Descriptive Note:
Technical note
Pagination:
0020

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):
HEL-TN-5-72
Monitor Series:
HEL
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_6.1.3_Switching and Routing; JCA_6_Net Centric; JCA_4.6_Engineering; JCA_3.2_Engagement; JCA_3_Force Application; JCA_6.1_Information Transport; JCA_3.2.1_Kinetic Means
Modernization Areas:
Directed Energy
Communities of Interest:
Human Systems
Descriptor(s):
*HELMETS, *AUDIOMETRY, FREQUENCY, TEST METHODS, HUMAN FACTORS ENGINEERING, AUDITORY PERCEPTION, ACOUSTIC SIGNALS, THRESHOLDS(PHYSIOLOGY)
Field(s)/Group(s):
Anatomy and Physiology, Protective Equipment
Keyword(s):
M 1 HELMETS
Report Date:
1972 Apr 01