  We define an alphabet, the IHA, of the 10-D phonetic-prosodic space. The
dimensions of this space are perceptual observables, rather than articulatory
specifications. Speech is defined as a random chain in time of the 4-D phonetic
subspace, that is, a symbolic sequence, augmented with diacritics of the
remaining 6-D prosodic subspace. The definitions here are based on the model of
speech of oral billiards, and supersedes an earlier version. This paper only
enumerates the IHA in detail as a supplement to the exposition of oral
billiards in a separate paper. The IHA has been implemented as the target
random variable in a speech recognizer.
