中文摘要：

声纳平台偶发噪声监测受随机干扰影响大．针对噪声监测虚警率高的问题，提出了基于二级报警阈值模型，在一级信号能量阈值的基础上，设置二级报警次数阈值．消声水池水下模型试验表明，二级阈值的设置能够有效减少虚警，提高报警准确度．

英文摘要：

The accidental noise monitoring of sonar platforms is affected by the random disturbance.Aiming at the noise monitoring problem of the false alarm rate,the model of a double stages threshold was proposed.The second threshold of the alerts number was founded,based on the first threshold of the signal energy.The results of the model experiment in an anechoic pool showed that the set of the second threshold can reduce the false alarm rate and improve the alarm accuracy.