More than 99% of the time, two words are enough for people with normal hearing to distinguish the voice of a close friend or relative amongst other voices. His study involved playing recordings to Canadian French speakers, who were asked to recognize on multiple trials which of the ten male voices they heard was familiar to them. "Merci beaucoup" turned out to be all they needed to hear.
from Strange & Offbeat News -- ScienceDaily http://ift.tt/1QbyZCh
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