文献类型：期刊文献

中文题名：基于VMD-Hilbert变换的大型网箱养殖鱼群声特性研究

英文题名：Study on Acoustic Characteristics of Cultured Fish in Large-Scale Cage Based on VMD-Hilbert Transform

作者：沈晨[1];张培珍[1];刘欢[1];唐杰平[1];高守勇[2];王振鹏[3]

机构：[1]广东海洋大学电子与信息工程学院,广东湛江524088;[2]91388部队湛江水声对抗国防科技重点实验室,广东湛江524022;[3]中国科学院广州能源研究所,广州510640

年份：2023

卷号：41

期号：6

起止页码：1054

中文期刊名：吉林大学学报（信息科学版）

外文期刊名：Journal of Jilin University（Information Science Edition）

收录：CSTPCD

基金：国家自然科学基金资助项目(11974084);湛江市创新创业团队引育领航计划基金资助项目(211207157080994);广东海洋大学研究生教育创新计划基金资助项目(040205112101)。

语种：中文

中文关键词：鱼群噪声;声压级;时频分析;变分模态分解;网箱养殖

外文关键词：fish noise;sound pressure level(SPL);time-frequency analysis;variational mode decomposition(VMD);cage farming

中文摘要：为解决养殖户很难监测到自己养殖鱼类的行为状态与投料反馈的问题,针对大型半潜平台“澎湖”号网箱养殖鱼群进行了昼夜连续的被动声学监测。结合昼夜时频分析结果,获得人工投料、投料机自动投料、外来船舶惊扰及深夜安静状态等4个时段的噪声频带及声压级分布特性。时频分析结果显示大范围自动投料下测得的鱼群活跃度明显高于其他状态,相对海洋环境背景噪声的声强度高出30 dB左右。外来船舶惊扰时测得的鱼群噪声强度高出人工投料时刻9 dB左右。深夜鱼群处于安静状态,鱼群活跃度最低,噪声声压级约为70~75 dB。通过变分模态分解(VMD:Variational Mode Decomposition)对时域信号进行模态分解,获得Hilbert谱分析显示:IMF1为鱼群拍打和泳动噪声高频噪声分量,IMF2为金鲳鱼摄食及活动噪声,频带位于1 100~3 000 Hz。石斑鱼进食及活动噪声频带为300~1 100 Hz,是第3阶IMF(Intrinsic Mode Function)分量的主要构成。希尔伯特边际谱在600~700 Hz频带范围内出现峰值,鱼群的生物噪声能量占比最高。研究海洋鱼群发声特性、行为状态与环境背景关系,预期为投饵调控、海上施工及网箱养殖鱼群种群分类研究提供基础。

外文摘要：Passive acoustic monitoring is carried out during a continuous day and night for cage culture fish in a large semi-submersible platform,named ‘Penghu'.Basing on the results of time-frequency analysis,the noise frequency band and sound pressure levels of four moments,e.g,manual feeding,automatic feeding by machine,ship disturbance,and quiet state in the middle of the night,are obtained.The results show that the activity of fish measured under large-scale automatic feeding is obviously higher than that of other states,and the sound intensity is about 30 dB higher than the background noise of the marine environment.When the ship passing by,the fish noise intensity is about 9 dB higher than that of the artificial feeding moments.Fish are in a quiet state and not active during late night,and noise sound pressure level is about 70 ~ 75 dB.The time-domain signal is decomposed by VMD(Variational Mode Decomposition).The obtained Hilbert spectrum analysis shows that IMF1 is the high-frequency noise component caused by fish flapping and swimming noise.IMF2 is the vocalization of golden pomfret with a frequency band of 1 100-3 000 Hz.The frequency band of grouper sound is 300~1 100 Hz,which is the main component of the third order IMF(Intrinsic Mode Function) component.The peak of Hilbert marginal spectrum is ranged in the 600~700 Hz,which is the frequency band that the highest energy proportion of bio-noise produced by fish.It is expected to provide a basis for bait regulation and population classification of the fish cultured in the large cage by studying the relationship between the vocal characteristics,behavioral state and environmental background.