论文部分内容阅读
根据频率特性对圈养宽吻海豚(Tursiops truncatus)在自由游动和训练两种实验条件下的声通讯信号进行分类,并利用双尾t检验统计分析方法对两种条件下的信号声谱参数进行统计比较。结果显示,宽吻海豚在自由状态下通讯信号的种类多并以正弦型为主,而训练期间的通讯信号则大多数为上扫频类。此外,统计分析表明起始频率不能反映这两种状态的不同(p=0.22)。结束频率、最小频率、最大频率、频率变化量、拐点数、环形数、阶数、波形数和周期等则显示了两种状态显著的差异性(p<0.05)。结果为今后海豚声行为研究提供一定的科学参考和基础。
According to the frequency characteristics, the acoustic communication signals of Tursiops truncatus under free-roaming and training conditions were classified. The two-tailed t-test statistical analysis method was used to measure the signal-to-sound spectrum parameters under both conditions Statistics comparison. The results showed that there were many kinds of communication signals in the free state of the bottlenose dolphins, and most of them were in the sinusoidal type, while most of the communication signals in the training period were in the upper sweep class. In addition, statistical analysis showed that the initial frequency did not reflect the difference between the two states (p = 0.22). End frequency, minimum frequency, maximum frequency, frequency variation, inflection point number, number of rings, number of orders, number of waveforms and period show significant differences between the two states (p <0.05). The results provide some scientific references and foundation for the future research of dolphin acoustics.