Editing distance information in compact microphone array recordings for its binaural rendering (応用音響)

Spatial sound information can be recorded using spherical microphone arrays. Realistic binaural renderings of such recordings require the head-related transfer functions (HRTFs), characterized from thousands of surrounding positions to both ears. We propose a 3D audio processing method to make sounds appear closer or farther than their original distance. HRTFs for only some surrounding positions at a fixed distance are required. Binaural signals are synthesized from samplings of the sound pressure field on a rigid spherical surface. The directional structure of both the sound pressure field and the HRTFs are encoded using spherical harmonics. Distance manipulations rely on the use of the spherical Hankel functions.

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