De-noising Analysis of Acoustic Emission Signals from Growth Process of Diamond Single Crystals Based on the Wavelet Transform

According to basic principle and method of wavelet transform, the acoustic emission (AE) signals from growth process of diamond single crystals under high-temperature and high-pressure were denoised by wavelet threshold denoising. The results show that the wavelet threshold denoising could be effective to eliminate noise of acoustic emission signals from growth process of diamond single crystals, and the acoustic emission characteristics of signals could not be destroyed. So the growth process of diamond single crystals could be studies accurately.