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Multichannel spatial auditory display for speech communicationsA 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 degrees 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 degrees azimuth positions.
Document ID
20040089768
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Begault, D. R.
(NASA Ames Research Center Moffett Field CA United States)
Erbe, T.
Wenzel, E. M.
Date Acquired
August 21, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Journal of the Audio Engineering Society. Audio Engineering Society
Volume: 42
Issue: 10
ISSN: 0004-7554
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Space Human Factors
NASA Discipline Number 06-10
NASA Center ARC
NASA Program Space Human Factors Engineering

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