句间停顿:
  • 1S
  • 3S
  • 5S
语速: x 1.0
  • 速度0.8X
  • 速度1.0X
  • 速度1.2X
  • 速度1.5X
  • 速度1.8X
  • 速度2X
始终显示原文
欢迎使用 KMF 精听精研
坚持练习精听,反复听、吃透每个句子,能够快速 提升听力能力
开始精听
或按 「 空格」开始播放

段落1

This is Scientific American 60-Second Science. I'm Karen Hopkin. This'll just take a minute.

点击显示原文

隐藏原文=

Got your attention? Thought so.

点击显示原文

隐藏原文=

But what is it about a piercing shriek that really turns our heads?

点击显示原文

隐藏原文=

It's what it does to our brains.

点击显示原文

隐藏原文=

The acoustical properties of the human scream poke at the neural circuits that control fear.

点击显示原文

隐藏原文=

That's according to a study in the journal Current Biology.

点击显示原文

隐藏原文=

Our every waking moment is filled with noise, from planes flying overhead to various creatures scrambling underfoot.

点击显示原文

隐藏原文=

But a heartfelt cry can cut through all that.

点击显示原文

隐藏原文=

So what's so special about the sound of a screech?

点击显示原文

隐藏原文=

To find out, researchers prepared a sampler of screams from YouTube videos, popular films and excited volunteers.

点击显示原文

隐藏原文=

If that screech sounded familiar, that's because it's the famous Wilhelm Scream, a stock sound effect heard in everything from Bugs Bunny to Star Wars.

点击显示原文

隐藏原文=

The scientists analyzed the acoustical characteristics of the various screams.

点击显示原文

隐藏原文=

And they found these alarming sounds are not only loud, they're particularly rough.

点击显示原文

隐藏原文=

That is, they rapidly change in frequency.

点击显示原文

隐藏原文=

Normal speech is relatively smooth, with frequencies ranging only between four and five Hertz, or cycles per second.

点击显示原文

隐藏原文=

But a shriek can swiftly fluctuate between 30 and 150 Hertz——a range that can make your hair stand on end.

点击显示原文

隐藏原文=

When the researchers asked people to rate how frightening screams were, they found that more roughness meant more terrifying.

点击显示原文

隐藏原文=

And increasing roughness of the sound corresponded to greater activation of the fear center of the brain.

点击显示原文

隐藏原文=

Only one other noise scored as high as screams in terms of roughness .

点击显示原文

隐藏原文=

Which, ironically, is enough to make you.

点击显示原文

隐藏原文=

Thanks for the minute, for Scientific American 60-Second Science. I'm Karen Hopkin.

点击显示原文

隐藏原文=
[ < 空格 > ]
当前句 /
/
  • 段落1
  • 第 1 句
  • 第 2 句
  • 第 3 句
  • 第 4 句
  • 第 5 句
  • 第 6 句
  • 第 7 句
  • 第 8 句
  • 第 9 句
  • 第 10 句
  • 第 11 句
  • 第 12 句
  • 第 13 句
  • 第 14 句
  • 第 15 句
  • 第 16 句
  • 第 17 句
  • 第 18 句
  • 第 19 句
  • 第 20 句
  • 第 21 句

+ 创建收藏夹
保存 取消