Advanced Audio and Virtual Human Sensory Interfaces: Improved Algorithm for Controlling Distance in 3-D Audio Displays
Department of Defense
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Small Business Information
Planning Systems, Inc.
7923 Jones Branch Drive, Mclean, VA, 22102
Socially and Economically Disadvantaged:
Gary L. Gibian
AbstractThe project goal is to produce an algorithm for synthesizing auditory distance which will be accurately perceived with little or no learning required. The algorithm could be added to an existing AF 30D audio system which uses headphones in a noise-reducing helmet. The approach is to combine very accurate recently developed atmospheric modeling with head-related transfer functions (HRTFs) to produce the most realistic simulation of outdoor sound propagation achieved to date. There are four technical objectives: (1) Demonstrate that realistic atmospheric modeling, including HRTFs for azimuth and elevation, provides effective distance cues. (2) Demonstrate that reference sounds, properly located in elevation, azimuth, and distance, provide accurate absolute distance cues. (3) Determine how listener training and learning affect performance. (4) Establish a range of distances which can be encoded, considering expected cockpit noise levels.
* information listed above is at the time of submission.