| WARF: P94101US |  |
| Methods and Apparatus for Producing Directional Sound |
| INVENTORS | • | Jiashu Chen, Barry Van Veen, Kurt Hecox |
OVERVIEW
Free-field-to-eardrum transfer functions (FETFs) are developed by comparing auditory data for points in three-dimensional space for a model ear and auditory data collected for the same listening location with a microphone. Each FETF is represented as a weighted sum of frequency-dependent functions obtained from an expansion of the measured FETF's covariance matrix. Spatial transformation characteristic functions
(STCFs) are applied to transform the weighted frequency-dependent factors to functions of spatial variables for azimuth and elevation. A generalized spline model is fit to each STCF to filter out noise and permit interpolation of the STCF between measured points. Sound is reproduced for a selected direction by synthesizing the weighted frequency-dependent factors with the smoothed and interpolated
STCFs.
ADDITIONAL INFORMATION
Intellectual Property Status
Tech Fields
Information Technology - Software
CONTACT INFORMATION
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