Accession Number:

ADA175350

Title:

Development of Simulated Directional Audio for Cockpit Applications

Descriptive Note:

Technical rept. Nov 1984-Jan 1986

Corporate Author:

GEORGIA INST OF TECH ATLANTA SYSTEMS ENGINEERING LAB

Report Date:

1986-01-01

Pagination or Media Count:

230.0

Abstract:

The long-term objective of this work is to develop techniques for conveying accurate spatial information via audio signals delivered to the listener through headphones or earphones. This project included three major activities 1 an extensive review and synthesis of the research literature on auditory localization, 2 the design, fabrication, and evaluation of an apparatus for demonstrating simulated auditory localization SAL, and 3 experimental research to determine characteristics of the audio signal, in the time and frequency domains, which enhance localization performance with simulated cues. Previous research is reviewed which describes the cues involved in the perception of sound-source direction, both horizontally and vertically, when the head is stationary. Also reviewed is research on auditory distance perception, the roles of head movement and vision in auditory localization, the perception of auditory motion and volume, and the effects of noise on auditory localization. A feedback control model is presented, which integrates evidence derived from four different theoretical positions concerning the effects of head movement and vision on auditory localization. Possible applications of SAL technology in aircraft cockpits are outlined, and the potential benefits of such applications are discussed. Topic areas in auditory localization are identified where further basic research is needed to support the development of Sal into a valuable pilot aid.

Subject Categories:

  • Aircraft
  • Acoustic Detection and Detectors
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE