"I think we have got to pay a wonderful tribute to a man to whom we owe all of this, he is in Johannesburg and if we make a loud enough noise he will hear us and so we say, halala Nelson Mandela."

VOA: standard.2010.06.11

Hunger is not essentially a message to other people but when humans when it involves a loud noise the reason why we've evolved loud noises is to communicate with other people.

饥饿不是一个传达给别人的信息,但人类会发出很大的声音,我们为什么会进化出很大的声音,就是为了与人沟通。

耶鲁公开课 - 心理学导论课程节选

So, why should a non-frightening incongruity cause people to make a distinctive loud noise consisted of staccato segments of one fifteenth of a second each separated by a fifth of a second?

为什么不引起恐惧的不一致性,会让人们发出一种与别不同的声音,而且这种声音是间断的，一节声音持续15分之一秒,两节声音之间也是相隔15分之一秒？

耶鲁公开课 - 心理学导论课程节选