摘要
基于声音信号特征判定复合材料是否脱层的研究中,为避免噪声对判定的干扰,需要对声音信号进行端点检测。提出一种将改进的谱减法和短时能量相结合的方法,利用谱减法对带噪语音信号进行增强处理,再基于短时平均能量进行单参数双门限的检测方法,实现了声音信号端点的检测。实验结果表明,此方法能快速有效的检测到声音信号的起止点。
In the investigation of deiamination, detection for composite structures based on sound, the noise will affect the results. To avoid the affection, sound endpoint detection is a necessary. A new method combing the spectral subtraction with the short-term en- ergy is proposed. The sound signal with noise is strengthened by the spectral subtraction, and then based on the mean short-term energy, a single parameter with double threshold test will be conducted. In this way, the sound endpoint detection is realized. Experi- ments show that the new method enables quick and effective detection of the sound starting point and endpoint.
出处
《机械制造与自动化》
2016年第3期191-192,209,共3页
Machine Building & Automation
关键词
谱减法
短时能量
双门限
声音信号
端点检测
spectral subtraction
short-term energy
double threshold
sound signal
endpoint detection
