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Table 5 Performance comparison of the SNR improvement in decidels for different methods in the presence of car noise

From: A semisoft thresholding method based on Teager energy operation on wavelet packet coefficients for enhancing noisy speech

SNR (dB) Universal threshold WPF algorithm WTHSKL method Proposed method
15 1.2 1.3 2.7 3.1
10 3.2 3.1 4.5 5
5 5.1 5 4.99 7.89
0 6.12 5.97 6.92 9.38
-5 8 7.76 8.86 11.9
-10 9.5 9.78 10.94 12.5
-15 11.51 10.98 11.1 13.37