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


Personal Author(s) : Ericson, Mark A ; McKinley, Richard L ; Valencia, German


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265563.pdf


Report Date : Jan 1991


Pagination or Media Count : 36


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.


Descriptors :   *ORIENTATION(DIRECTION) , *AUDITORY PERCEPTION , *EARPHONES , DATA BASES , SIGNAL PROCESSING , ELECTRONICS , PERFORMANCE(HUMAN) , DEPTH , ACOUSTIC SIGNALS , MEDICAL RESEARCH , EAR , SOUND GENERATORS , CUES(STIMULI) , AUDITORY ACUITY , AUDITORY SIGNALS , DIRECTIONAL , HEAD(ANATOMY) , ACOUSTIC EQUIPMENT , SOUND , ACCURACY , HUMANS , FACILITIES , ELECTRONIC EQUIPMENT


Subject Categories : Psychology
      Medicine and Medical Research
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE