NewScientist.com has reported that using new reconstructions of Neanderthal vocal tracts, anthropologist Robert McCarthy has been able to work out how they would have sounded.
By using fossil evidence and computers, scientists have been able to simulate what Neanderthals would have sounded like. They have concluded that Neanderthals spoke, but lacked "quantal vowel" sounds in their speech.
McCarthy's team has managed to engineer the Neanderthal "e" sound so far. Eventually, McCarthy wants to model an entire Neanderthal sentence.