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Multichannel spatial auditory display for speech communications.

D R Begault1, T Erbe

  • 1Aerospace Human Factors Research Division, NASA-Ames Research Center, Moffett Field, CA 94035-1000, USA.

Journal of the Audio Engineering Society. Audio Engineering Society
|October 1, 1994
PubMed
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NASA developed a spatial auditory display to improve communication clarity. Spatializing sound to 60 or 90 degrees azimuth significantly enhanced speech intelligibility for launch personnel.

Area of Science:

  • Acoustics
  • Human-Computer Interaction
  • Signal Processing

Background:

  • Effective auditory displays are crucial for complex operational environments like space launch facilities.
  • Existing auditory systems may struggle with multiple simultaneous audio inputs, leading to reduced intelligibility.
  • NASA's Ames Research Center has pioneered advancements in spatial audio technology.

Purpose of the Study:

  • To develop and evaluate a spatial auditory display for enhancing multiple speech communications.
  • To assess the impact of sound source localization on speech intelligibility in a noisy environment.
  • To determine optimal spatial audio parameters for critical communication tasks.

Main Methods:

  • Development of a spatial auditory display using simplified head-related transfer functions (HRTFs) and FIR filtering.
Keywords:
NASA Center ARCNASA Discipline Number 06-10NASA Discipline Space Human FactorsNASA Program Space Human Factors Engineering

Related Experiment Videos

  • Implementation of hardware and firmware for a prototype system at NASA Kennedy Space Center.
  • Utilizing an adaptive staircase method to measure speech intelligibility of call signs against speech babble at various spatial positions.

    • Main Results:

    • Speech intelligibility was measured for four-letter call signs under diotic and spatialized conditions.
    • Spatialization of the auditory signal was evaluated at 30-degree azimuth increments.
    • A maximum intelligibility improvement of 6-7 dB was observed when signals were presented at 60 or 90 degrees azimuth.

    Conclusions:

    • Spatial auditory displays can significantly improve speech intelligibility in multi-talker environments.
    • Specific spatial audio configurations (60-90 degrees azimuth) offer optimal benefits for communication clarity.
    • This technology has direct applications for enhancing operational safety and efficiency at NASA and similar organizations.