The Role of Semi-vowels

الملخص EN

This experiment shows how a semivowel is the same as an approximant vowel, except that is momentary.

As soon as one prolongs the approximant structure of [j] or [w], it turns back into a vowel.

Vowels are maintainable sounds.

Semivowels are momentary.

Another way of describing the difference is to say that articulators are going into position, a (hold) when the articulators remain in position for an appreciable time, and a (release) or (off-glide) when the articulators move away from the position they took up during the 'hold’.

A semi-vowel, on the other hand, has only one or two phases- it completely lacks the (hold) phase.

As initial semivowel, like (y) [i] in (yes) has no audible approach, no hold, but only a rapid release, or off glide from the [i] position.

A medial semivowel, like the [w] in (away), has an approach (on-glide) followed immediately by a release (off-glide) with no intervening hold.

The articulators go from a neutral or relaxed position into the position for [w], which they immediately leave again (Catford, 1.994 : 71-72).