测试结束后，一组人在一个三维虚拟现实房间里坐了15分钟，观看大自然的图片，聆听大自然的声音。
After the test, one group of people sat in a 3D virtual reality room for fifteen minutes with pictures and sounds of nature.
13年前，研究者研究了一组在受到不熟悉的刺激比如不寻常的气味和未知声音的录音时表现出轻微紧张的25名婴儿。
154thirteen years ago, researchers studied a group of 25 infants who showed signs of mild distress when exposed to unfamiliar stimuli such as an unusual odor or a tape recording of an unknown voice.
然后他们向听力正常的一组人回放录音，看看他们是否可以从不同声音中辨认出发声人的情绪。
Then they played back those recordings for a group of hearing individuals, to see if they could decipher the emotion behind each sound.
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