Fig. 4

Plan view of the M2 microphone configuration. A description of the microphone labels is given in Table 2. The radial grid spacing of the polar plot is 0.1 m. DPA 4060 microphones are used for the inner circular microphone array and AKG CK32 microphones are used for the outer circular microphone array. The circle drawn around the microphones represents the M2 microphone configuration in the floor plans in Fig. 6. For extracting more precise coordinates of the microphone and loudspeaker positions, the MATLAB or Python scripts discussed in Section 6.2 should be used