引入J-偏差作为有向偏差的改进,并提出了一种新的距离有效性评价指标-归一化关键点高度(NKH).利用仿真数据和舱段试验数据,以线谱频率改变等4种类型的常见声学故障为研究对象,针对欧氏距离等5种距离定义,系统地开展声学故障检测有效性的评价研究.结果表明,J-偏差的检测效果要优于常用的欧式距离和Hausdorff距离.%J-divergence was induced as an improvement of directive divergence.By introducing a new kind of evaluation index, normalized key-points height (NKH), a simulation and a cabin model test were presented to evaluate the effect of five different distance concepts including Euclidean distance etc.on four kinds of acoustic faults.The result showed that J-divergence is the best choice for acoustic fault detection.
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