The Scientific World Journal / 2014 / Article / Fig 4

Research Article

Voice Activity Detection in Noisy Environments Based on Double-Combined Fourier Transform and Line Fitting

Figure 4

Difference in patterns of 1st FFT and 2nd FFT: (a) pattern of noisy speech signal and pattern of noise signal after 1st FFT and (b) pattern of noisy speech signal and pattern of noise signal after 2nd FFT.
146040.fig.004a
(a)
146040.fig.004b
(b)