Figure 2
From: Incipient Gear Fault Detection Using Adaptive Impulsive Wavelet Filter Based on Spectral Negentropy

Simulation signal: (a) without noise, (b) with noise, and (c) the FFT of the simulation signal
From: Incipient Gear Fault Detection Using Adaptive Impulsive Wavelet Filter Based on Spectral Negentropy
Simulation signal: (a) without noise, (b) with noise, and (c) the FFT of the simulation signal