[Retracted] Research and DSP Implementation of Speech Enhancement Technology Based on Dynamic Mixed Features and Adaptive Mask

Table 2

Average Short-Term Objective Intelligibility of Speech (STOI).

Noise	Signal-to-noise ratio (dB)	SRNN	SRU	GRU	CGRU
factory2	−5	0.773	0.789	0.786	0.805
	0	0.852	0.868	0.870	0.888
	5	0.901	0.916	0.912	0.929
buccaneer1	−5	0.623	0.625	0.584	0.636
	0	0.745	0.748	0.720	0.760
	5	0.833	0.836	0.826	0.852
destroyerengine	−5	0.624	0.616	0.595	0.633
	0	0.749	0.752	0.734	0.767
	5	0.841	0.850	0.841	0.865
hfchannel	−5	0.655	0.655	0.645	0.671
	0	0.768	0.774	0.773	0.792
	5	0.847	0.862	0.861	0.879