Like bats, they use echolocation to navigate.

和蝙蝠一样，它们也利用回声定位来导航。

OCT is a form of optical echolocation.

OCT的原理是光学回声定位。

Think of it like echolocation with a melody.

把它想象成带有旋律的回声定位。

" … and then the echolocation calls in between, and then trills again."

“然后回声出现在两者之间，然后再次发出颤音。”

Well, bats do hunt in the dark using echolocation.

好吧，蝙蝠确实是使用回声定位在黑暗中狩猎。

At this point, the zombies rely on echolocation after losing their sight.

在这一阶段，僵尸失去视力后依靠回声定位。

But bats already invest most of their vocal resources in echolocation for hunting.

但蝙蝠已将大部分声音资源投入捕猎回声定位中。

Both have evolved to use echolocation to spot environments even in total darkness.

两者都进化到即使在完全黑暗的环境中也能使用回声定位来看清环境。

Its echolocation beam is locked onto its prey, but the moth is also emitting ultrasound.

它的回声定位声波已经锁定了它的猎物，但蛾子也在发射超声波。

The acoustic energy from the echolocation is thus absorbed.

这样，回声定位产生的声能就会被吸收。

Even more amazing, bats navigate by echolocation which basically means they can see using sound.

更令人惊奇的是，蝙蝠是通过回声定位来导航的，这基本上意味着它们可以用声音来看到东西。

Something amazing about dolphins is the way they find their prey: echolocation!

令人惊讶的是，海豚通过超声波定位来寻找猎物。

Bats use echolocation to hunt for their meals, and moths are often on the menu.

蝙蝠利用回声定位来捕获食物，飞蛾也经常出现在它们的菜单上。

Grover said the whales use a system called echolocation to find food and avoid barriers underwater.

格罗弗说，鲸鱼使用一种叫做回声定位的系统来寻找食物并避开水下的障碍物。

And they resonate at frequencies that pretty much perfectly match the frequencies that bats use for echolocation.

飞蛾鳞片共振的频率与蝙蝠用来回声定位的超声波频率几乎完全一致。

That's the sound of a narwhal looking for food using echolocation, like a dolphin or a bat.

这是独角鲸像海豹或蝙蝠那样利用回声定位觅食时的声音。

So if bats are hunting at night, they can ricochet their echolocation off of a leaf configuration and find moths that way.

因此，如果蝙蝠在夜间捕食，它们可以从树叶结构上反弹回声定位，这样就可以找到飞蛾。

Every night, hundreds of species of hungry bats fly around the rainforest and use echolocation to hunt for their meals.

每天晚上，几百种饥饿的蝙蝠在雨林飞来飞去，使用回声定位来捕食。

He also -- we can tell he's -- when he's moving his head, he's working on his echolocation and exploring.

他也——我们可以看到他——当他晃动头部，他在努力定位和探索。

15.OK, so quick summary of how echolocation works.

好了，我们快速说一下回声定位是如何起作用的。