Identification of Sound Source Azimuth with Active and Passive Hearing Protectors

Abstract

A stimulus identification procedure was used to investigate the effects of active and passive circumaural hearing protectors on static auditory localization ability. Signals were long duration broad band noise bursts presented randomly from 36 equally spaced transducers arranged in a circle. Results indicate that, in some subjects, the passive devices caused an approximate 180 deg shift in perceived azimuth without reducing the available range of locations. The active devices effectively eliminated localization ability by reducing the number of perceptual loci to one or two. Loss of localization ability is attributed to electroacoustic deficiencies of the active circuits. Keywords: Ballistic protection devices; Army artillery crewmen; Marine Corps combat vehicle crewmen.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1982
Accession Number
ADA168542

Entities

People

  • Lloyd F. Elfner
  • William R. Howse

Organizations

  • Florida State University

Tags

Communities of Interest

  • Air Platforms
  • Biomedical

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Acoustics
  • Amplifiers
  • Amplitude
  • Anechoic Chambers
  • Attenuation
  • Biomedical Research
  • Combat Vehicles
  • Ear
  • Identification
  • Losses
  • Marine Corps
  • Medical Personnel
  • Microphones
  • Perception
  • Quadrants
  • Transducers

Fields of Study

  • Engineering

Readers

  • Acoustics.
  • Phased Array Antenna Design.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.

Technology Areas

  • Space
  • Space - Space Objects