AN INVESTIGATION INTO THE EFFECT OF +Gz STRESS ON BINAURAL SIGNAL DETECTION PERFORMANCE USING A SPATIAL AUDIO DISPLAY

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Authors
  1. Welker, A.C.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Welker Audio Consulting, Waterloo ONT (CAN)
Abstract
The study was completed under DCIEM Contract W711-6-7331/001/SRV and was undertaken to investigate binaural speech discrimination performance of several types of headgear in both diotic and diffuse-field masking noise. This document describes the equipment setup requirements for this experiment in addition to the results of a pilot study involving five subjects. The details of the equipment and speech discrimination task are described in detail in "An Investigation into the Differences Between HRTFs in a Spatial Audio Disply System for Improving Speech Intelligibility" by Welker, 1996. Each subject completed 4 sessions with each of the following headset/diotic masker combinations: Stax Lambda Headphone/Speech Babble; AKG K-500 Headphone/Speech Babble; Gentex SPH5 Helmet/Speech Babble; Peltor MT22H7F Headset (ANR Active)/Speech Babble; Stax Lambda Headphone/SeaKing Helicopter Noise. These sessions used maskers presented over the headset under test within an International Acoustics Company (IAC) sound-attenuating booth. Each session lasted approximately 30 minutes and measured speech intelligibility thresholds of randomized three digit numbers presented under a Diotic condition and spatialized at 0, 60, 90, 270, and 300 degrees azimuth. TRUNCATED
Keywords
Human Binaural Signal Detection Performance;Binaural Reproduction Hardware/Software;Head Related Transfer Function (HRTF) Validation;Spatial Auditory Display;Effect of Physiological Stress on Audition
Report Number
DCIEM-97-CR-34 — Contractor's Report (Final)
Date of publication
01 Oct 1997
Number of Pages
39
DSTKIM No
98-00300
CANDIS No
506962
Format(s):
Hardcopy;Document Image stored on Optical Disk

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