中文摘要：

在对现有水下目标噪声信号分布研究的基础上,基于声学分析中的1/3倍频程分析和人耳的听觉掩蔽效应,提出了1/3倍频程掩蔽谱特征提取方法,并对水下目标辐射噪声进行了特征提取和特征分析。结果表明,不同类的目标,其主频范围有其固定的区域。I类目标的主频一般在100Hz附近,II类目标的主频一般在100Hz和200Hz附近,III类目标的主频一般在450Hz附近。针对从属于三大类目标的29种目标中提取出的1107个样本进行了分类识别实验,识别正确率大于86%,验证了所提出的方法的有效性。

英文摘要：

The feature extraction method of 1/3 octave masking spectrum for underwater target noise is proposed in this paper by combing the 1/3 octave analysis in acoustics and masking effect of human ears.The features of three kinds of underwater target noise are extracted by using 1/3 octave masking spectrum.The results show that every kind of target noise has its own main frequency band.The main frequency band of the first kind of targets is near 100Hz,the second kind near 100Hz to 200Hz,and the third kind near 450Hz.Total 1107 noise data sets of 29 targets which belong to three kinds are analyzed,and 86 percent of correct recognition probability obtained,so the effectiveness of 1/3 oc-tave masking spectrum for feature extraction is verified.