Title:
【発明の名称】指向性音を作る方法及び装置
Document Type and Number:
Japanese Patent JPH08502867
Kind Code:
A
Abstract:
Free-field-to-eardrum transfer functions (FETF's) 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 (STCF's) 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 STCF's.
Inventors:
Chen Iashu
Vanven Barry Dee
Hecox Cart E
Vanven Barry Dee
Hecox Cart E
Application Number:
JP51102293A
Publication Date:
March 26, 1996
Filing Date:
March 01, 1993
Export Citation:
Assignee:
Wisconsin Alumni Research Foundation
International Classes:
H04R5/027; H04R5/033; H04S1/00; H04S7/00; (IPC1-7): H04S1/00; H04R5/027; H04R5/033; H04S1/00; H04S7/00
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)