Practically Efficient Blind Speech Separation Using Frequency Band Selection Based on Magnitude Squared Coherence and a Small Dodecahedral Microphone Array

Table 4

Experimental results.

(𝐵1,𝐵2,𝐵3)	Number of selected bands	Computational complexity	SIR improvement (dB)	Segmental SNR (dB)	Cepstral distortion (dB)
(1,1,1) (conventional method)	200	1.0	24.4	7.85	2.65
(1/3,1/2,1)	134	0.45	22.3	7.80	2.51
(1/3,1/2,1/2)	97	0.24	21.8	7.74	2.48
(1/5,1/3,1/2)	77	0.15	20.6	7.52	2.30
(1/5,1/3,1/3)	64	0.1	20.8	7.45	2.30
Uniformly spaced	64	0.1	19.9	6.18	2.58