H-and-H model

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Lindblom's theory of Hyper and Hypo-articulation claims that speakers vary articulatory clarity according to the informational requirements of their listener: speakers hyper-articulate when listeners require maximum acoustic information, and reduce articulatory effort when listeners can supplement the acoustic input with information from other sources (Lindblom, 1990). To prevent speakers from over-economising to a point of unintelligibility, hypo-articulation is governed by a constraint of lexical distinctiveness: speakers hypo-articulate only while listeners are able to distinguish the target from competing lexical items.

Link

Utrecht Lexicon of Linguistics

References

  • Lindblom, B. 1990. Explaining phonetic variation: A sketch of the H & H theory, In W. J. Hardcastle & A. Marchal: "Speech Production and, 403-439, Kluwer Academic Publishers, Dordrecht