Figure 4

Microphone array setup of the proposed system and its coordinate system. The setup uses an array with three microphones, in a 2D array positioned horizontally. There are two coordinate systems being used: the local coordinate system per microphone array D _{l;x y} that uses the front of the pair as its reference, and the global coordinate system \(\mathit {D}^{[0]}_{l;xy}\) that uses the front of the whole array as reference.