The emission and receiving of calls are not only influenced by the sound - emitting apparatus and sound - receiving apparatus , but also by the body size , age , state and foraging stages of bats 回声定位声波的发出和分析处理不仅受声波发射器官及声波接收器官结构的限制，也受蝙蝠的体型、年龄、蝙蝠的状态、蝙蝠捕食阶段等因素的影响。
The study of the echolocation calls of bat is hotspot and emphases in the world . the speciality of the ecological niche and the calls of bat make it very important to study the echolocation calls of bats 蝙蝠回声定位的研究在国际上一直是热点和重点，因为蝙蝠特殊的生态位及声行为的独特性，决定了蝙蝠回声定位行为的生态学研究具有重要意义。
These differences were analyzed to show that the echolocation calls will change greatly so as to adapt to the different flying style , foraging behavior and habitats of bats . 3 蝙蝠不同状态下回声定位声波存在差异的分析说明，蝙蝠的回声定位声波能够产生较大的变异，其意义在于适应其不同的飞行方式、捕食策略和栖息环境以及捕食猎物的体型大小。
These sounds are generally emitted through the mouth , but horseshoe and leaf - nosed bats emit their echolocation calls through their nostrils , there they have basal fleshy horseshoe or leaf - like structures that are well adapted to function as megaphones 这些声音一般通过口发出，但具有马蹄铁形和叶形鼻于的蝙蝠则通过鼻孔发出它们的回声定位叫声，在那里它们具有非常适合放大器功能的基本的肉质马蹄铁或叶状结构。
During the evolution bait flys to avoid competitions with other animals which live in ocean or on land . successful evolution of echolocation system in the sky makes them avoid competitions with birds . so thy occupied a special ecological niche - sky of night 在进化的过程中，蝙蝠避开与其他海陆兽类的竞争而飞向天空；在空中，回声定位系统的高度进化使它们避开与鸟类的竞争而占据了独特的生态位- - - -黑暗的夜空。
The echolocating calls in the state of fly were compared with those in the state of hang in two kinds of bats , r . yunanensis and h . pratti , and the doppler compensation effect was described . the analyzing result indicated that the frequency in hang was higher that that in fly , the duration and interpulse duration in hang were longer than those in fly , and the fm bandwidth in hang was narrower than that in fly 比较了云南菊头蝠和普氏蹄蝠飞行状态和悬挂状态下的回声定位声波，描述这2种蝙蝠的多普勒补偿效应，悬挂状态声波频率显著高于飞行状态，声脉冲时间和间隔时间显著长于飞行状态， fm带宽窄于飞行状态。
There are some intra - species differences in the echolocation calls of myotis daubentoni , myotis ricketti , myotis capaccinii , miniopterus schreibersii parvipes and pipistrellus abramus when they are in different state such as flying , being held , crawing and setting off . the intra - species differences of myotis daubentoni , myotis ricketti are most significant 栉鼠耳蝠、大足鼠耳蝠、毛腿鼠耳蝠、普通长翼蝠福建亚种和普通伏翼在飞行、手持、爬行和起飞等不同状态下的回声定位声波均具有一定差异。
This paper applies discret wavelet transform ( dwt ) to the analysis of echolocation calls of several bats . taking advantage of retractility and time - delay characteristics of wavelet , this paper solves the problems of fixed resolving power and large redundance of the information caused by traditional sonogram analysis by choosing the scale of wavelet correctly 本文将离散小波变换应用于蝙蝠回声定位叫声的分析中，利用小波的伸缩和时移特性，通过对小波尺度的适当离散，解决了传统语谱分析的分辨率固定、信息冗余量大的问题。
The characteristics of echolocating calls of r . yunanensis , r . macrotis , h . pratti and h . bicolor were analyzed and described ; it is the first time in china to do this kind of research . r . yunanensis is native to china , so the research on its echolocation is characteristic of china and provides new data to set up the echolocating calls database in the world 对云南菊头蝠、大耳菊头蝠、普氏蹄蝠、双色蹄蝠的回声定位声波进行分析，描述其声波特征，是国内首次对这4种蝙蝠回声定位声波的报导，云南菊头蝠是中国特有蝙蝠，对其进行声波描述具有中国特色，为国际蝙蝠回声定位声波库的建立提供新的数据和资料。
The bat mother and its child were compared concerning their morphology and echolocating calls , and the change in morphology and echolocating calls , which happened as the young bat grew were discussed . the communicating behavior between the mother and the young was described and thus the calls played an important role in the communication between the mother and the young 对云南菊头蝠的母幼蝠进行形态和声波上的比较研究，探讨随着云南菊头蝠生长发育其形态和回声定位声波的变化，描述母幼的交流行为，确定其母幼交流的方式主要为声音。
