Accession Number:

ADA456892

Title:

High Speed Vessel Medical Limited Objective Experiment, Noise Assessment and Noise Reducing Stethoscope Field Test

Descriptive Note:

Memorandum rept. Dec 2002-Jun 2004

Corporate Author:

NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT

Report Date:

2006-08-26

Pagination or Media Count:

20.0

Abstract:

Throughout NSMRLs pursuit in making optimal use of auditory information in sonar displays, interference from airborne sound in the listening environment has been a major issue. NSMRLs success in using active noise cancellation to prevent masking by airborne sound has lead to the realization that shipboard spaces may be habitable by hearing-risk standards, but not operationally suitable for critical mission tasks. Digital sound processing has opened up the auditory detection, display and transmission of information in inherently noise environments. This Medical Limited Objective Experiment LOE was valuable both to evaluate the noise environment in spaces not designed for habitation, and to simultaneously test a pre-production noise-reducing stethoscope. In controlled setting under operationally-relevant shipboard noise conditions in the field tests, the noise-reducing stethoscope proved to be significant, substantial improvement over a conventional sound-powered device.

Subject Categories:

  • Medicine and Medical Research
  • Acoustics
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE