基于多带谱减法的生物雷达语音增强方法研究

A New Kind of Nonlinear Spectral Subtraction Method for Radar Speech Enhancement

传统麦克风采集语音信号存在一定的局限性,如不能长距离获取语音、抗噪声性能弱、方向性差等。为了克服传统麦克风存在的缺点,采用一种新型的雷达式麦克风来获取语音。然而采用生物雷达获取的语音信号存在着较强的电磁噪声和环境噪声;因此,采用多频带谱减法对生物雷达语音信号进行了增强。与传统语音增强方法的对比结果表明,这种多带谱减法针对性强、效果较好。

The traditional microphone acquisition signal has some limitations that it can＇t obtain the voice for a long distance and has a weak performance of anti-noise and poor sense of direction. In order to overcome the limitations,radar microphone is used which is a new speech collecting technology. However,electromagnetic noise and environmental noise exist in the process of radar collect speech,therefore,a new kind of nonlinear spectral subtraction（ multi-band spectral subtraction） method is used to eliminating the noise. Compared results with the traditional speech enhancement method suggest that the proposed method is a better way to remove the noise.