Adaptive Noise Reduction Algorithm Based on SPP and NMF for Environmental Sound Event Recognition under Low-SNR Conditions

Table 1

F1-score for the recognition task.

Input SNR	Method	Scream	Car horn	Gunshot	Average
5 dB	Noisy	87.9	76.2	77.3	80.5
	Pro	90.0	92.8	92.0	91.6
0 dB	Noisy	82.0	75.7	75.0	77.6
	Pro	88.0	91.2	89.1	89.4
-5 dB	Noisy	67.2	65.5	67.5	66.7
	Pro	80.8	85.7	84.0	83.5
Average	Noisy	79.0	72.4	73.3	74.9
	Pro	86.2	89.9	88.4	88.2