Dwt is testified to be a new effective way in analyzing the echolocation signals of bats 因此，小波分析是分析蝙蝠回声定位叫声的一种有效的新途径，有其广泛的应用价值。
Many bats emit an echolocation call that contains a narrow frequency range and then analyze returning echoes to navigate and to detect prey 许多蝙蝠会发出频率?围狭窄的回声定位呼叫，然后分析回声来作导航与侦测猎物。
When ben was 3 , he began teaching himself echolocation , something he picked up by tossi ng objects and making clicking noises to find them 班恩三岁时，就自学回声定位，他丢掷物体再藉由发出舌音去找那些东西，这样就学会了。
Most species are highly vocal , although they vary in the range of sounds they produce , and many forage for food using echolocation1 大部分的种类有很好的发音能力，尽管他们制造的声音不同，而且许多用来做食物的草料都是用回声定位功能。
Echolocation calls are usually ultrasonic ranging in frequency from 20 to 200 kilohertz ( khz ) , whereas human hearing normally tops out at around 20 khz 用于回声定位的叫声一般是20 200千赫之间的超声波，而人所能听到的最高频率在20千赫左右。
We can find some new character of the echolocation calls of bat , and it is very important for search for new character of bats in animal ecology 从分析结果中我们能够发现一些蝙蝠回声定位信号的新的特征信息，这对于进一步寻找蝙蝠新的生态学特征有着重要意义。
After all , why not just wire the entire sensory system for high - resolution input and eliminate the need to constantly shift the eyes , star , or echolocation frequency 说来说去，何不将整个感觉系统都装配成高解析度的接收器，就可以免除不断移动眼睛、星鼻或改变回声定位频率的麻烦？
First , we introduces the meaning of studying echolocation , what means have been used by now , accomplishments got by others and pose the meaning of surveying sound field intensity 首先，介绍研究蝙蝠回声定位信号的意义，目前的研究手段以及研究成果，提出对其声场测量的学术意义。
Blind as a bat ? hardly . to detect prey and other objects , some bats use a sight - free radar system called echolocation . but all bats can see . see 像蝙蝠一样看不见吗？才不是呢。为了探测猎物和其它物体的方位，有些蝙蝠用一种叫作回声定位的雷达系统，无需视力，但所有蝙蝠都看得见。你明白了吗？
Fm sweeping and interpulse intervocal ranging from 23 . 6 ms to 443 . 8ms . myotis capaccinii use echolocation calls with short duration , long interpulse intervocal , wide fm sweeping and low duty cycle 6种蝙蝠飞行状态下的回声定位声波均为fm型，一般包括1 3个谐波，能量多集中于第1谐波，第2谐波和第3谐波较弱。
