Spherical harmonic analysis has been a widely used approach for spatial audio processing in recent years. Among all applications that benefit from processing, Active Noise Control (ANC) remains unique with its requirement open spherical microphone arrays to record the residual sound field throughout continuous region. Ideally, low delay recording algorithm is desired real-time ANC systems. Curr...

Spherical harmonics are often used for compact description of incident radiance in low-frequency but distant lighting environments. For interaction with nearby emitters, computing the incident radiance at the center of an object only is not sufficient. Previous techniques then require expensive sampling of the incident radiance field at many points distributed over the object. Our technique all...

There has been a strong interest in theory and design of spherical microphone arrays in recent years due to their possible use in recording directional sounds for surround sound creation. The theory of such arrays is based on decomposition of sound fields to spherical harmonics which are the natural basis functions for valid sound fields over three dimensional space. However, due to physical si...