And we placed infrasonic microphones around the elephants as we did these experiments.

在进行这些实验时，我们把次传器放置在大周围。

Elephants do that. Rhinos do that. Hippos do that. Crocodiles do that. Alligators do it. They produce infrasound.

大就会次交流，犀牛也会。还有河马，鳄鱼，短吻鳄。它们都能发出次波。

Elephants, for example, talk with each other using infrasound– far below our human hearing range.

大远低于人类听觉范围的次波唠嗑。

It's possible you could have actually died from the sound wave impacting and smashing through your body.

你甚至可能会死于这次波对你的冲击和粉碎。

At the other end, in the deep infrasound, elephants and whales, tigers and some birds make sound.

另一端的低频次，大、鲸鱼、老虎和一些鸟类会制造这样的音。

But even if you didn't, you would be guaranteed to be permanently deaf for life afterwards.

但即你能幸免于难，这次波也能保证你后半生会终身失聪。

Anything below that is called infrasound.

低于此的任何东西都称为次。

So, that is how elephants use infrasound.

好了，这就是大次波的方式。

But it travels even further through the earth as infrasonic rumbles.

但随着次波的隆隆，它在地球上传播得更远。

But this peacock is also making very loud infrasound with its tail, which you cannot hear, but female peahens can.

但这只孔雀与此同时也在它的尾巴制造次巨响，你是听不到的，但雌性孔雀可以听见。

These are extremely low sounds that we humans are unable to hear, but fans, wind turbines and traffic can produce them.

次波的频率非常低，我们人类无法听到，但是它能产生于风扇，风轮机和交通工具。

The system, the firm claims, produces frequencies from infrasonic to ultrasonic that are " essentially capable of effectively simulating any ship" .

该公司称，该系统产生从次波到超波的频率，“基本上能够有效地模拟任何船只”。

Hidden sounds, because much acoustic communication in nature occurs in the high ultrasound, above your hearing range, or in the deep infrasound, below your hearing range.

隐秘音，是因为自然界中很多音的交流都会在高频超的频段，超过了你的听觉范围，或是在低频次的频段，低于你的听觉范围。

And it turns out they're communicating to each other in infrasonic rumbles to warn each other of the threat of bees and to stay away from the area.

后来发现它们在次波段隆隆低语地交流来警告彼此蜜蜂的威胁并且远离蜜蜂所在区域。