Prospects for speech pattern element aids.

A brief discussion is given of new hearing aids which are based on the use of speech pattern elements. Their operation essentially involves the reduction of the complex acoustic structure of the original speech signal into simpler sets of perceptually clear components which are then encoded for maximally relevant presentation to the listener. This approach has four primary features which may contribute crucially to future advances. First, by providing for external analysis, reduced or even non-existent ability in the impaired ear can be palliated. Second, by the selection of appropriate elements of the original speech signal, the stimulation can be tailored so that it matches the residual auditory ability--psychophysical and cognitive--of the deaf person. Third, the speech, language, and also environmental needs of the individual adult or developing child can be met in structured ways. Fourth, the use of selective pattern sensitive analysis methods makes it possible in practice to provide a degree of in-built immunity to domestic and working acoustic environments.