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The clever way your brain filters out background noise

Ever wondered how we can still pick up conversations in noisy environments? Apparently our brains do some clever filling in when it misses out fragments of speech. Professor Matthew Leonard who's with the Department of Neurological Surgery at the University of California San Francisco tests out the hearing - and thinking - of our presenters.

(Photo: Woman shielding ears Credit: Thinkstock )

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Duration:

3 minutes