Voiceless Alveolar Sibilant - Comparison With The Spanish Apico-alveolar Sibilant

Comparison With The Spanish Apico-alveolar Sibilant

The term "voiceless alveolar sibilant" is potentially ambiguous in that it can refer to at least two different sounds. Various languages of northern Iberia (e.g. Astur-Leonese, Catalan, Basque, Galician, Portuguese and Spanish) have a so-called "voiceless apico-alveolar sibilant" which lacks the strong hissing of the described in this article, but rather has a duller, more "grave" sound quality somewhat reminiscent of a voiceless retroflex sibilant. Basque, Mirandese and some Portuguese dialects in northeast Portugal (as well as medieval Spanish and Portuguese in general) have both types of sounds in the same language.

There is no general agreement about what actual feature distinguishes these sounds. Spanish phoneticians normally describe the difference as apical (for the northern Iberian sound) vs. laminal (for the more common sound), but Ladefoged and Maddieson claim that English /s/ can be pronounced apical, which is evidently not the same as the apical sibilant of Iberian Spanish and Basque, In addition, Adams asserts that many dialects of Modern Greek have a laminal sibilant with a sound quality similar to the "apico-alveolar" sibilant of northern Iberia.

Some authors have instead suggested that the difference lies in tongue shape. Adams describes the northern Iberian sibilant as "retracted". Ladefoged and Maddieson appear to characterize the more common hissing variant as grooved, and some phoneticians (e.g. J. Catford) have characterized it as sulcal (which is more or less a synonym of "grooved"), but in both cases there is some doubt about whether all and only the "hissing" sounds in fact have a "grooved" or "sulcal" tongue shape.