Comparsion among vocoders:

Example 1 (SNR=17.5dB, Reverberation T60=188ms)
Natural Noisy and Reverb	Natural Clean
Baseline-NSF'	Baseline-NSF	Baseline-HiNet'	Baseline-HiNet	DNR-HiNet	DNR-HiNet w/ BF

Example 2 (SNR=12.5dB, Reverberation T60=300ms)
Natural Noisy and Reverb	Natural Clean
Baseline-NSF'	Baseline-NSF	Baseline-HiNet'	Baseline-HiNet	DNR-HiNet	DNR-HiNet w/ BF

Example 3 (SNR=2.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean
Baseline-NSF'	Baseline-NSF	Baseline-HiNet'	Baseline-HiNet	DNR-HiNet	DNR-HiNet w/ BF

Example 4 (SNR=17.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean
Baseline-NSF'	Baseline-NSF	Baseline-HiNet'	Baseline-HiNet	DNR-HiNet	DNR-HiNet w/ BF

Example 5 (SNR=7.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean
Baseline-NSF'	Baseline-NSF	Baseline-HiNet'	Baseline-HiNet	DNR-HiNet	DNR-HiNet w/ BF

Example 6 (SNR=2.5dB, Reverberation T60=188ms)
Natural Noisy and Reverb	Natural Clean
Baseline-NSF'	Baseline-NSF	Baseline-HiNet'	Baseline-HiNet	DNR-HiNet	DNR-HiNet w/ BF

Comparsion with SE methods:

Example 1 (SNR=17.5dB, Reverberation T60=188ms)
Natural Noisy and Reverb	Natural Clean
DNR-HiNet w/ BF	cIRM	SEGAN	WaveNet	T-GSA	DNR-HiNet* w/ BF

Example 2 (SNR=12.5dB, Reverberation T60=300ms)
Natural Noisy and Reverb	Natural Clean
DNR-HiNet w/ BF	cIRM	SEGAN	WaveNet	T-GSA	DNR-HiNet* w/ BF

Example 3 (SNR=2.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean
DNR-HiNet w/ BF	cIRM	SEGAN	WaveNet	T-GSA	DNR-HiNet* w/ BF

Example 4 (SNR=17.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean
DNR-HiNet w/ BF	cIRM	SEGAN	WaveNet	T-GSA	DNR-HiNet* w/ BF

Example 5 (SNR=7.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean
DNR-HiNet w/ BF	cIRM	SEGAN	WaveNet	T-GSA	DNR-HiNet* w/ BF

Example 6 (SNR=2.5dB, Reverberation T60=188ms)
Natural Noisy and Reverb	Natural Clean
DNR-HiNet w/ BF	cIRM	SEGAN	WaveNet	T-GSA	DNR-HiNet* w/ BF

 

Ablation studies:

Example 1 (SNR=17.5dB, Reverberation T60=188ms)
Natural Noisy and Reverb	Natural Clean		DNR-HiNet w/ BF	DNR-HiNet-S w/ BF	DNR-HiNet-S w/ F
DNR-HiNet-S w/ B	DNR-HiNet-S wo/ C w/ BF	DNR-HiNet-S wo/ RNI w/ BF	DNR-HiNet-S wo/ Iloss w/ BF	DNR-HiNet-S wo/ R w/ BF	DNR-HiNet-S wo/ N w/ BF

Example 2 (SNR=12.5dB, Reverberation T60=300ms)
Natural Noisy and Reverb	Natural Clean		DNR-HiNet w/ BF	DNR-HiNet-S w/ BF	DNR-HiNet-S w/ F
DNR-HiNet-S w/ B	DNR-HiNet-S wo/ C w/ BF	DNR-HiNet-S wo/ RNI w/ BF	DNR-HiNet-S wo/ Iloss w/ BF	DNR-HiNet-S wo/ R w/ BF	DNR-HiNet-S wo/ N w/ BF

Example 3 (SNR=2.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean		DNR-HiNet w/ BF	DNR-HiNet-S w/ BF	DNR-HiNet-S w/ F
DNR-HiNet-S w/ B	DNR-HiNet-S wo/ C w/ BF	DNR-HiNet-S wo/ RNI w/ BF	DNR-HiNet-S wo/ Iloss w/ BF	DNR-HiNet-S wo/ R w/ BF	DNR-HiNet-S wo/ N w/ BF

Example 4 (SNR=17.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean		DNR-HiNet w/ BF	DNR-HiNet-S w/ BF	DNR-HiNet-S w/ F
DNR-HiNet-S w/ B	DNR-HiNet-S wo/ C w/ BF	DNR-HiNet-S wo/ RNI w/ BF	DNR-HiNet-S wo/ Iloss w/ BF	DNR-HiNet-S wo/ R w/ BF	DNR-HiNet-S wo/ N w/ BF

Example 5 (SNR=7.5dB, Reverberation T60=593ms)
Natural Noisy and Reverb	Natural Clean		DNR-HiNet w/ BF	DNR-HiNet-S w/ BF	DNR-HiNet-S w/ F
DNR-HiNet-S w/ B	DNR-HiNet-S wo/ C w/ BF	DNR-HiNet-S wo/ RNI w/ BF	DNR-HiNet-S wo/ Iloss w/ BF	DNR-HiNet-S wo/ R w/ BF	DNR-HiNet-S wo/ N w/ BF

Example 6 (SNR=2.5dB, Reverberation T60=188ms)
Natural Noisy and Reverb	Natural Clean		DNR-HiNet w/ BF	DNR-HiNet-S w/ BF	DNR-HiNet-S w/ F
DNR-HiNet-S w/ B	DNR-HiNet-S wo/ C w/ BF	DNR-HiNet-S wo/ RNI w/ BF	DNR-HiNet-S wo/ Iloss w/ BF	DNR-HiNet-S wo/ R w/ BF	DNR-HiNet-S wo/ N w/ BF

 

SPSS experiments:

Example 1
Natural Noisy and Reverb	Natural Clean
Pre-SE+HiNet	No-SE+DNR-HiNet	No-SE+HiNet

Example 2
Natural Noisy and Reverb	Natural Clean
Pre-SE+HiNet	No-SE+DNR-HiNet	No-SE+HiNet

Example 3
Natural Noisy and Reverb	Natural Clean
Pre-SE+HiNet	No-SE+DNR-HiNet	No-SE+HiNet

Example 4
Natural Noisy and Reverb	Natural Clean
Pre-SE+HiNet	No-SE+DNR-HiNet	No-SE+HiNet

Example 5
Natural Noisy and Reverb	Natural Clean
Pre-SE+HiNet	No-SE+DNR-HiNet	No-SE+HiNet

Example 6
Natural Noisy and Reverb	Natural Clean
Pre-SE+HiNet	No-SE+DNR-HiNet	No-SE+HiNet