Accession Number:

ADA592042

Title:

Acoustic Measurement and Model Predictions for the Aural Nondetectability of Two Night-Vision Goggles

Descriptive Note:

Final rept. 1 Nov 2012-1 Sep 2013

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD HUMAN RESEARCH AND ENGINEERING DIRECTORATE

Report Date:

2013-11-01

Pagination or Media Count:

32.0

Abstract:

This study evaluates two different night-vision goggles NVGs to determine if the devices meet level II aural nondetectability standards of MIL-STD-1474D for a detection distance of 10 m. These systems PVS-14 and PVS-7D were tested while mounted on an Advanced Combat Helmet placed on the Knowles Electronic Manikin for Acoustic Research Auditory Test Fixture in the Environment for Auditory Research s Dome Room, a semi-anechoic research space. All tests were conducted in both the linear and automatic gain control AGC modes of operation for each system, and measurements were made at eight locations around the devices. The results of the testing revealed that in the linear mode, both devices emitted a faint tone centered at 2 kHz, but in no case did the NVGs fail the nondetectability criteria of 10 m. In AGC mode, both systems emitted a tone but the PVS-14 did not fail the nondetectability criteria. However, the PVS-7D failed the 10-m detection criteria at several of the measurement positions.

Subject Categories:

  • Optical Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE