妇儿健康导刊2024，Vol.3Issue(13)：21-24,4.
胎心音信号降噪研究
Study on noise reduction of fetal heart sound signal
蔡凤丽1
作者信息
- 1. 山东省巨野县中医医院妇产科,山东巨野 274900
- 折叠
摘要
Abstract
Objective To study fetal heart sound signal noise reduction.Methods Based on the ensemble empirical mode decomposition(EEMD)and fetal heart sound signal denoising algorithm of wavelet entropy,EEMD was performed on the cardiac sound signal,calculated the decomposed intrinsic mode function(IMF)of normalized autocorrelation function,picked out the noise of the IMF adaptive wavelet entropy threshold of noise reduction,Finally,the fetal heart sound signal was reconstructed based on the denoised IMF and the signal-dominated IMF to achieve noise reduction.Results The signal-to-noise ratio of the model was 12.35,which was better than that of wavelet denoising,wavelet entropy threshold denoising,and the combination of EEMD and wavelet threshold denoising algorithm.Conclusion The noise reduction model proposed in this research can reduce the noise of fetal heart sound signals more effectively.关键词
集合经验模态分解/小波熵/胎心音/降噪Key words
Ensemble empirical mode decomposition/Wavelet entropy/Fetal heart sound/Noise reduction分类
医药卫生引用本文复制引用
蔡凤丽..胎心音信号降噪研究[J].妇儿健康导刊,2024,3(13):21-24,4.
