Sound Source Identification with ANR Earmuffs

PDF

Authors
  1. Abel, S.M.
  2. Shelly Paik, J.E.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
Abstract
The effect on sound localization of hearing protective earmuffs which incorporate active noise reduction (ANR) was studied. Two groups of normal hearing subjects aged 18-30 yrs and 40-55 years participated. Sound localization was assessed using a circular array of eight loudspeakers. Three stimuli, one-third octave bands centered at 0.5 kHz and 4 kHz and broadband noise, were presented Age, gender, and ANR were not significant determinants of outcome. The probably of correctly discriminating among the eight speakers decreased significantly with the muff, relative to unoccluded listening by 10%, 35% and 40% for the 0.5 kHz, 4 kHz and broadband stimuli respectively. The pattern of errors indicated that the earmuffs interfered with the encoding of interaural and spectral cues normally used by the brain for sound source identification. The results argue strongly against the use of earmuffs in situations where the perception of the direction of hazard is of concern.

Il y a un résumé en français ici.

Keywords
hearing protection;active noise reduction;directional hearing
Report Number
DRDC-TORONTO-SL-2003-130 — Scientific Literature
Date of publication
30 Apr 2004
Number of Pages
10
DSTKIM No
CA027639
CANDIS No
525644
Format(s):
Electronic Document(PDF)

Permanent link

Document 1 of 1

Date modified: