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Journal Article

Multichannel Spatial Auditory Display for Speech Communications

Authors: Begault, Durand R.; Erbe, Tom

Journal of the Audio Engineering Society · Volume 42 · Issue 10 · pp. 819–826 · October 1994

Abstract

A spatial auditory display for multiple speech communications was developed at NASA/Ames Research Center. Input is spatialized by the use of simplified head-related transfer functions, adapted for FIR filtering on Motorola 56001 digital signal processors. Hardware and firmware design implementations are overviewed for the initial prototype developed for NASA-Kennedy Space Center. An adaptive staircase method was used to determine intelligibility levels of four-letter call signs used by launch personnel at NASA against diotic speech babble. Spatial positions at 30° azimuth increments were evaluated. The results from eight subjects showed a maximum intelligibility improvement of about 6-7 dB when the signal was spatialized to 60 or 90° azimuth positions.

Details

Publication
Journal of the Audio Engineering Society
Volume
42
Issue
10
Pages
819–826
Publication date
October 6, 1994
Affiliation
Human Interface Branch, Aerospace Human Factors Research Division, NASA-Ames Research Center, Moffett Field, CA ; School of Music, California Institute for the Arts, Valencia, CA (See document for exact affiliation information.)
Type
Journal Article