舰船噪声不同窄带包络间相关

Envelopes correlation between different narrow-band filtered ship noise

给出了舰船噪声不同中心频率窄带包络间相关系数（频间包络相关）R和滤波中心频率差值（频差）△fni、起始滤波中心频率fn的值、滤波带宽△f以及时延τ的关系,并和海洋环境噪声的R～△fni曲线进行了比较。结果表明,舰船噪声频间包络相关和海洋环境噪声频间包络相关有显著差异。

The relationship among the narrow-band envelopes correlation coefficient (Frequency-envelopes correlation) of ship noise, R, the mid-frequency difference △fni of filter, the initial filter mid-frequency fn, the filter pass-band △f and the time-delay τ is presented. The relation curves mentioned above are compared with the R - △fni curve of sea ambient noise. It is shown that there exists significant difference between the frenquecy-envelopes correlations of ship noise and sea ambient noise.