Accession Number:

ADA265563

Title:

Human Auditory Localization Performance in Azimuth

Descriptive Note:

Final rept. Oct 85-Jan 91,

Corporate Author:

ARMSTRONG LAB WRIGHT-PATTERSON AFB OH

Report Date:

1991-01-01

Pagination or Media Count:

36.0

Abstract:

The Harry G. Armstrong Aerospace Medical Research Laboratory developed a unique research auditory localization facility for special, in-depth investigations of human auditory localization phenomena. A study was conducted in the facility to measure localization performance with three types of acoustic signal in azimuth 1 natural, free-field acoustic cues heard with the ears uncovered, 2 simulated cues recorded at the ears of an acoustic manikin and presented over headphones, and 3 acoustic cues generated by an electronic auditory localization cue synthesizer and presented over headphones. Purposes of the study were 1 to evaluate relative localization accuracy and response time with the free-field, simulated and synthesized cues, 2 to examine the feasibility of localization of synthesized cues over headphones, and 3 to establish data base of human auditory localization performance with these signals. Results across the three conditions averaged about 5 to 6 degrees in accuracy magnitude error and 3.5 to 4.5 seconds in response time. Localization performance with simulated and synthesized cues was essentially equivalent to natural free-field cues, demonstrating the capability of the localization cue synthesizer to present realistic directional sounds in azimuth.

Subject Categories:

  • Psychology
  • Medicine and Medical Research
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE