Accession Number : ADA306267

Title :   Further Research on Super Auditory Localization for Improved Human-Machine Interfaces.

Descriptive Note : Final technical rept. 1 Jun 94-31 Jan 96,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS

Personal Author(s) : Durlach, Nathaniel

PDF Url : ADA306267

Report Date : 15 MAR 1996

Pagination or Media Count : 25

Abstract : The general objectives of our initial work on Super Auditory Localization were to determine, understand, and model the perceptual effects of altered localization cues. We had initially intended to conduct this work using a virtual-environment (VE) system for visual as well as auditory stimulation, and to include examination of a wide variety of transformations (rotations, scalings, filterings, asymmetries, exponentiations). As will be seen in the following discussion, we have made substantial progress towards our general objectives. However, our work was conducted using a hybrid VE in which the acoustical simulation was virtual but the visual simulation was real, we focused on only one family of azimuthal transformations, and we made no effort to measure our own HRTFs. The decision to use available HRTFs rather than to construct our own was based on the realization that, at least for our purposes, such work would have a relatively low payoff-to-effort ratio compared to other work that needed to he done. Both the hybrid VE and the azimuthal transformation used are described in Sec. l.B below. The gaps between our stated objectives and our actual accomplishments are the result of a number of factors. The first and most important is that the total funding we have received constitutes only a small fraction of the funding that we requested in order to achieve the above-stated goals. whereas our proposal totalled roughly $1,501,000, the total amount of funds that we have actually received to date for this project is roughly $700,000 ($650,000 from AFOSR and $50,000 from NASA). (All figures are Total Costs, not Direct Coats).

Descriptors :   *MAN MACHINE SYSTEMS, *VIRTUAL REALITY, *AUDITORY PERCEPTION, MATHEMATICAL MODELS, SIGNAL PROCESSING, COMPUTERIZED SIMULATION, IMAGE PROCESSING, STIMULATION(PHYSIOLOGY), OPTIMIZATION, REAL TIME, PERFORMANCE(HUMAN), RESOLUTION, ECHOES, ACOUSTIC SIGNALS, HYBRID SYSTEMS, VISUAL PERCEPTION, RESPONSE(BIOLOGY), AZIMUTH, MICROPHONES, HEARING, HELMET MOUNTED DISPLAYS, PSYCHOPHYSICS, PSYCHOPHYSIOLOGY, EARPHONES, CUES(STIMULI), ADAPTATION(PHYSIOLOGY).

Subject Categories : Cybernetics
      Human Factors Engineering & Man Machine System
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE