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对所采集到网箱中人工养殖的两组不同年龄大黄鱼(Pseudosciaena crocea)产生的声信号进行定量分析和比较,运用分段指数振荡函数合成大黄鱼声信号,并利用振荡频率和衰减指数定量地描述了鱼声信号特性。结果显示,合成的大黄鱼声信号在时频域都显示出很好的拟合优度,13—15月鱼龄组的平均振荡频率和衰减指数均低于7—8月鱼龄组。结果表明函数的振荡频率和衰减指数与大黄鱼发声的物理过程及年龄特征存在一定的联系,为今后人工养殖大黄鱼中声学技术的相关应用提供一定的科学参考和基础。
The acoustic signals from two groups of artificial breeding Pseudosciaena crocea cultured in cages were quantitatively analyzed and compared. The acoustic signals of the large yellow croaker were synthesized by the piecewise exponential oscillating function and quantified using the oscillation frequency and the attenuation index Described the fish sound signal characteristics. The results showed that the synthesized signals of large yellow croaker showed good goodness of fit in the time-frequency domain. The average oscillation frequency and attenuation index of fish in the 13-15 month group were lower than those in the July-August fish age group. The results show that the oscillation frequency and attenuation index of the function are related to the physical process and age characteristics of large yellow croaker, which will provide some scientific reference and basis for the future application of acoustics in farmed yellow croaker.