每段录音都有一系列的押韵字词，志愿者要在不同程度的背景噪音下佩戴与不佩戴该智能扩音器来辨别这些词。
Each recording had a series of rhyming words that the volunteers had to identify, with and without the intelligent microphone, for different levels of background noise.
如果辨别正确，会被要求再试一次。 值得注意的是，这次会在之前的声音中加入噪音，使元音更加难以辨认，本周的《新科学家》报道。
If they got it right, they were asked to try again, only this time, noise was added to make the sound harder to recognise, this week’s New Scientist reports.
另外一个实验是让参与者辨别出混入在立体声白色噪音中特定声音的方向。
Another test asked participants to work out the direction of specific sounds embedded within stereo white noise.
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