Multi-channel spatial auditory display for speech communicationsA spatial auditory display for multiple speech communications was developed at NASA-Ames Research Center. Input is spatialized by 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 deg azimuth increments were evaluated. The results from eight subjects showed a maximal intelligibility improvement of about 6 to 7 dB when the signal was spatialized to 60 deg or 90 deg azimuth positions.
Document ID
19950028513
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Begault, Durand (NASA Ames Research Center Moffett Field, CA, United States)
Erbe, Tom (Mills College, Oakland, CA United States)