文献类型：期刊文献

中文题名：大型网箱养殖鱼群声信号短时频谱特性

英文题名：Short-time Characteristics of Acoustic Signals of Fish Farming in Large Cages

作者：刘欢[1];张培珍[1];沈晨[1];李高聪[1];高守勇[2]

机构：[1]广东海洋大学电子与信息工程学院,广东湛江524088;[2]湛江水声对抗国防科技重点实验室,广东湛江524022

年份：2023

卷号：43

期号：3

起止页码：17

中文期刊名：广东海洋大学学报

外文期刊名：Journal of Guangdong Ocean University

收录：CSTPCD、、CSCD_E2023_2024、北大核心、CSCD、北大核心2020

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

语种：中文

中文关键词：大型网箱养殖;短时分析;鱼声信号辨识;声特征提取;统计特性

外文关键词：large cage farming;short-term analysis;fish sound recognition;acoustic feature extraction;statistical characteristics

中文摘要：【目的】研究大型网箱养殖鱼群声信号特性,为鱼类声学特性研究和智能养殖提供参考。【方法】利用被动声学技术对大型网箱鱼群进行昼夜持续监测,计算人工投料、自动投料、摄食后以及深夜安静等特殊时段下鱼群发声信号的短时谱,获取短时能量和短时过零率的统计特征,对比区分网箱混叠三种鱼群在不同外界激励条件下的发声频段、发声方式和短时特征。【结果与结论】1)石斑鱼(Epinephelus drummondhayi)进食时发出咕噜和轰隆声,信号频带为200~1000 Hz;卵形鲳鲹(Trachinotus ovatus)进食过程通过喉齿摩擦和拍打发出声音,信号频带为600~2000 Hz;叫姑鱼(Johnius grypotus)摄食时通过鳔内的气体振动发出以200~1500 Hz为基频的声音,且存在持续到7000 Hz的高频谐波。2)鱼群游动身体相互摩擦和拍打水花的噪声频段为2000~5000 Hz。3)网箱混叠三种鱼群的声信号在短时特征上可得到区分,短时特征值大小为叫姑鱼>卵形鲳鲹>石斑鱼。

外文摘要：【Objective】The characteristics of acoustic signals of fish farmed in large cages are studied to provide a reference for fish acoustic characteristics research and intelligent aquaculture of fish.【Method】During day-and-night,passive acoustic technology was used for continuous monitoring of fish stocks in the large cage.The short-time spectrums of the sound signal of fish during special periods were calculated,such as manual feeding period,automatic feeding period,feeding completion period and quiet period at midnight.The statistical characteristics of short-time energy and short-time zero crossing rate were obtained.Under different external excitation conditions,the frequency band,vocalization methods and short-time characteristics of the aliasing sound from three fish groups in the cage were compared and distinguished.【Result and Conclusion】(1)The sound of groupers(Epinephelus drummondhayi)are grunts and booms when they eat,the frequency band of them is about 200-1000 Hz;The golden pomfrets(Trachinotus ovatus)make sounds through tooth friction and patting during the feeding process.The frequency band is about 600-2000 Hz;The drum fish(Johnius grypotus)make sounds with a fundamental frequency of 200-1500 Hz through the vibrations of their swim bladders,and exist high frequency harmonics up to 7000 Hz.(2)The frequency band of radiated noise generated by the friction between the bodies and the splashing of the water when the fish are in the free-swimming state is about 2000-5000 Hz.(3)The acoustic signals of the three schools of fish farming in the large cage can be distinguished by short-time characteristics.The short-time eigenvalues of the three fish are:the drum fish>the golden pomfrets>the groupers.the values of the drum fish are maximum,then the golden pomfrets,the values of the groupers are minimum.