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Interpenetration of stages

Interpenetration of stages usually takes place when consonants of a similar or identical nature are joined.

In this case the end of the first sound penetrates not only into the beginning but also into the middle part of the second sound.

Sounds of a similar nature articulated by different parts of the tongue.

The organs of speech move away already in the middle of the first sound to take up the position necessary to pronounce the second sound.

The back part of the tongue is raised in the direction of the soft palate, and is pressed against the soft palate, and a complete obstruction is formed. At this moment the tip of the tongue is raised in the direction of the alveolar ridge to form a complete obstruction. After the tip of the tongue touches the alveolar ridge the back part of the tongue is lowered.

When the complete obstruction is removed, the air escapes through the mouth of cavity with a kind of plosion; then the blade with the tip of the tongue is lowered, the soft palate is lowered too, and the organs of speech take up a neutral position

Sounds of a similar nature articulated by the same part of the tongue (with the same place of articulation).

Two adjacent dental sounds with different manner of the production of noise are linked by interpenetration of stages.

For example in the pronunciation of [-nth-], the on-glide of the second sound partly penetrates into the on-glide of the first sound. The same type of junction takes place when two alveolar consonants with different manner of the production of noise are joined together.

The air escapes through the nasal cavity with nasal plosion. The air escapes along the sides of the tongue with lateral plosion. An alveolar plosive and an affricate are also joined together by interpenetration of stages.

It should be borne in mind that the tongue tip remains pressed against the alveolar ridge at the end of the sound [t], and the complete obstruction of [t] is not removed. As a result of this, no plosion is heard at the end of the sound [t]

Identical sounds.

Two identical sounds are joined together as follows: the second sound penetrates into the beginning of the first one that is the organs of speech, while moving to take up the position necessary to pronounce the first sound, already fully prepare for the pronunciation of the second.

Any pair of identical sounds is pronounced in a similar way, that is to say, interpenetration is accompanied by the omission of two stages: the off-glide of the first and the on-glide of the second sound

6.9

Sounds of a different nature articulated by different organs of speech are joined together by means of interpenetration of stages even though they are of the different nature