TABLE 6.

Comparison of the proposed GRU model with LSTM model for different noise types. Noisy speech mixed with alert signal at 0 dB SNR.

Noise Type	SE Method + Separation	Objective measures
		SAR	SDR	SIR	CSII
	GRU	−2.32	−3.18	24.64	0.5243
Traffic	LSTM	−2.56	−3.90	24.17	0.5135
	GRU	1.37	1.32	24.67	0.6222
Machinery	LSTM	0.94	0.90	24.09	0.6142
	GRU	−4.02	−4.36	21.86	0.4178
Babble	LSTM	−4.33	−4.72	21.08	0.4096