基于听觉感知的不同航速稳态舰船噪声合成

声纳人员培训和人耳辨识舰船声实验中常需要完备的敌我舰船辐射噪声样本,但实录各国舰船噪声几乎是不可能的。因此,合成与真实水下声样本听觉感知相同的舰船辐射噪声十分必要。研究了舰船航速对其辐射噪声的影响及人耳听音的临界带通特性,通过已知的零散舰船噪声样本合成目标舰船在其它未知状态下的辐射噪声。采用临界带通滤波和线谱迭加方法,分别合成了目标舰船在低、中、高三种不同航速下的稳态辐射噪声。为了验证合成声的有效性,进行了主观评价实验,采用成对比较法验证了15组不同航速状态下的合成舰船噪声样本。结果表明,合成舰船噪声样本能够被人耳有效识别,准确率达93%。

Auditory perception based steady ship noise synthesis at different speeds

The actual ship noise is extremely required in sonar operator training,however,it is almost impossible to obtain such noise samples,hence the synthesis of the ship noise based on timbre is necessary.This paper first summarizes the influence of ship’s speed on its radiated noise and the critical bandpass property of human hearing,and further presents a method to synthesize the ship noise at different speeds from some segments of sound in hand.The critical bandpass filtering and the line spectra summation are introduced.Finally,the paired comparison（PC） is carried out in a subjective evaluation test with 10 subjects participated in,to validate the synthesized noise’s availability.The result shows that human auditory can effectively identify the synthesized ship noise with a mean accurate rate of 93%.