Accession Number:

AD0728909

Title:

Field Evaluation of an Improved Ear Plug (INM-Modified V.51R),

Descriptive Note:

Corporate Author:

ROYAL NAVAL PERSONNEL RESEARCH COMMITTEE LONDON (ENGLAND)

Personal Author(s):

Report Date:

1969-10-01

Pagination or Media Count:

40.0

Abstract:

A modified form of the V.51R type ear plug designed to allow much improved speech communication, while retaining the impulse noise attenuation of the original V.51R, is described with a brief account of the principles which led to its design. Details are then given of the practical trials in which the expected performance was confirmed these included speech communication tests under controlled and field conditions, and evaluation of the protection against the noise of the self-loading rifle SLR and two heavy weapons by measurements of temporary threshold shift. Author

Subject Categories:

  • Protective Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE