146040.fig.008a
(a)
146040.fig.008b
(b)
146040.fig.008c
(c)
146040.fig.008d
(d)
Figure 8: Results of the proposed algorithm in an exhibition hall-noise environment: (a) noisy speech signal at SNR −5 dB, (b) clean speech signal, (c) the proposed feature, and (d) edge detection filter output based on the proposed feature.