Preliminary experiment in a reverberant room

For evaluation in a realistic environment, we used 16 microphones placed at 4 $\times$ 4 mesh points with spans of 10cm in a reverberant room with computer noise present. The target sound arrived from a one-meter distance in the direction perpendicular to the microphone plane. Interfering speech sounded at the 10dB signal-to-noise ratio to which reverbaration and computer noises in the room were added.

The recognition results are shown in Table 2. Compared with the case of one microphone, CSCC method remarkably improved the performance, though it did not work significantly better than the Delay-and-Sum method, probably due to the reverberant condition of the room.