Simulated microphone array

In simulated microphone array experiments, 3 to 16 micorphones were equally spaced on a circle with a diameter of 30cm. The target and noise sources were assumed to be on the same plane as the microphone array.

Word accuracies are shown in Table 1. ``1 microphone'' means the performance without using microphone array. It is clear that the CSCC method outperforms the Delay-and-Sum method in all conditions and yields high performances near to clean speech recognition.

表 2: Word accuracy [%] in preliminary experiments in a real reverberant environment

	1 microphone	DS	CSCC
clean	37.4	61.1	59.5
noisy	9.3	34.1	38.2