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Articulatory Training of the Deaf using Low-Frequency Surrogate Fricatives

Harry Levitt
Bell Telephone Laboratories, Murray Hill, New Jersey

Philip A. Bellefleur
Pennsylvania School for the Deaf, Philadelphia, Pennsylvania

This preliminary investigation attempted to determine whether training of the deaf using realtime acoustic displays of low-frequency surrogates for /s/ and // would aid in the improvement of the articulation of these phonemes. Each member of the experimental group received articulatory instruction largely devoted to fricatives while having auditory access both to a teacher's production of low-frequency surrogate fricatives and to simultaneous feedback of his own productions in the surrogate form. Members of a control group received similar instruction short of exposure to the surrogates. The results indicate that training with acoustic surrogate fricatives mildly facilitated improvement in articulation of /s/ and substantially facilitated articulation of //.