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Multichannel Spatial Auditory Display for Speed CommunicationsA spatial auditory display for multiple speech communications was developed at NASA/Ames Research Center. Input is spatialized by the use of simplifiedhead-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 degree 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 degree azimuth positions.
Document ID
20000065625
Document Type
Reprint (Version printed in journal)
Authors
Begault, Durand R. (NASA Ames Research Center Moffett Field, CA United States)
Erbe, Tom (NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
October 10, 1994
Publication Information
Publication: Journal of the Audio Engineering Society
Volume: 42
Subject Category
Communications and Radar
Distribution Limits
Public
Copyright
Other