MARINE BIOLOGICAL CHORUSES OBSERVED IN XIAMEN HARBOUR     

张民强  施性乞  林学清  李伟  兰柏桂  柯路阳  黄晓丹 《海洋学报(英文版)》1984,3(3):321-326

Marine biological choruses observed in Xiamen harbour from August 1981 to October 1982 lasted for a few hours each time during the neap tide in spring, summer and autumn, in both the evening and the morning, with molt energy at frequencies between 700 Hz and 1.6 kHz and spectral peaks mainly at 800 Hz, 1 kHz and 1.25 kHz. During choruses, noise spectrum levels rose up to 46 dB higher than the background noise in the sea Mate 0. The statistics of occurrence of the evening choruses indicate that they might be fairly widespread in and near shallow waters of the region. Sources of such choruses are likely to be attributed to Johnnius belengerii and Collichthys lucidut of the family Sciaenidae.  相似文献   

最佳系统流噪声的分析     

张民强  柯路阳  黄晓丹 《海洋技术学报》1983,(3)

本文利用McGrath等人的观测流噪声的结果和Stasrberg的理论估算作为分析最佳系统流噪声的依据。  相似文献   

厦门港观测的海洋生物大合唱     

张民强  施性乞  林学清  李伟  柯路阳  黄晓丹 《海洋学报》1984,6(1):10-15

本文描述了1981年8月至1982年10月间在厦门港观测的海洋生物大合唱。这些大合唱出现在春、夏和秋季小潮期间,一次持续几个小时,其声能主要集中在700-1600赫之间,主谱峰在800,1000和1250赫。大合唱时,噪声谱级比零级海况的背景噪声级高46分贝。在该测站上,观测到黄昏大合唱和黎明大合唱。出现黄昏大合唱的统计数字表明这种大合唱可能在该浅海区及其邻近海域是相当普遍的。本文还讨论上述大合唱之可能的噪声源,大概是石首鱼科之皮氏叫姑鱼和棘头梅童鱼。  相似文献