Fast Time-Domain Spherical Microphone Array Beamforming

Capturing and reproducing 3D audio has several applications. Spherical array based beamforming is an important technique in this field. However, such a beamformer is very expensive to implement, especially for interactive applications. In this paper, we propose a fast spherical beamforming algorithm in the time domain. It uses pre-computed data and can be steered to arbitrary 3D directions. It is ideal for interactive audio applications such as 3D games, etc. Simulation and experimental results are demonstrated to verify our algorithm.