Talk:Kagamine Rin \ Len/@comment-4494553-20121029192957/@comment-5051846-20121029193426

In linguistics, a triphone is a sequence of three phonemes. [1] Triphones are useful in models of natural language processing where they are used to establish the various contexts in which a phoneme can occur in a particular natural language.

Bought to you by Wikipedia. (I didn't know either, so now we are both smarter for it)

You may understand better if you also check out the Phonemes article.