The Neanderthals became extinct from this earth 30,000 years ago.  Now a technology has been developed which will help us understand how the Neanderthals used to speak.  It is a computer model developed by Florida Atlantic University.  Robert McCarthy is an anthropologist at Florida Atlantic University.  He used fossils dating back 50,000 years old and reconstructed Neanderthal vocal tracts to imitate their voice.  He opined that the Neanderthal speech lacked quality vocal sounds, which are the basis of modern speech.  Mr. McCarthy pointed out that the quantal vowels offer clues that help people with different vocal size tracts understand one another.  He said this in a meeting held at Columbus, Ohio of the American Association of Physical Anthropologist.  They had spoken differently.  They have not able to produce these vowels, which is the basis of the spoken language.  The researchers modeled the sounds of the Neanderthal vocal pipes.  They engineered the way a Neanderthal would produce the sound of E.   Mr. McCarthy would try to imitate a Neanderthal would speak a full sentence.