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

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.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2013
Accession Number
ADA592042

Entities

People

  • Jeremy Gaston
  • Kelly Dickerson
  • Tim Mermagen

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Ambient Noise
  • Automatic Gain Control
  • Department Of Defense
  • Detection
  • Ear
  • Engineering
  • Environment
  • Frequency
  • Measurement
  • Military Research
  • Night Vision
  • Research Facilities
  • Sound Pressure
  • Standards
  • Temperature Gradients
  • Test Fixtures

Readers

  • Acoustics.
  • Image Processing and Computer Vision.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems
  • Space
  • Space - Space Objects