【作者】 周韦峥嵘； 许肖梅； 邵志文；

【Author】 ZHOU-WEI Zheng-rong;XU Xiao-mei;SHAO Zhi-wen;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology(Xiamen University),Ministry of Education;

【机构】 厦门大学水声通信与海洋信息技术教育部重点实验室；

【摘要】 本文研究了中华白海豚whistle声信号在通讯中的作用机理,对采集到的whisle信号的谐波进行了统计分析,通过计算谐波的声传播损失和谐波声源级,估算了谐波的有效作用距离。结果表明,whistle信号中多个谐波分量的存在,不仅增强了信号的指向性,而且提高了信号的抗干扰能力;此外,从谐波的有效作用距离来看,中华白海豚个体间在相距约23m时,为了利用高次谐波的指向性和协调群体之间行动,会发出更多次的whistle信号。更多还原

【Abstract】 In the present study,we discussed the manner that the humpback dolphin uses whistles in the wild,analysed the harmonics in the whisles,and estimated the active distance of the harmonics by calculating the sound transmission loss and the source level of harmonics.The results showed that,the existence of multiple harmonic components in the whistle,enhance both the directivity and anti-interference ability of the whistle;Moreover,in view of the active distance,when spaced an average of 23 m,the humpback dolphin will send more whistles to take advantage of the directivity of high order harmonics to coordinate the group movement.更多还原