Compléter CompleteVersion en ligne Complete par Florencia GIMENEZ 1 affricate nasal fricative lateral plosive approximant 1 . When sounds are articulated , we perceive this plosion as a sudden puff or whiff or air . 2 . When sounds are articulated , two organs are brought together and held close enough so that the escaping airstream produces local air turbulence or friction . 3 . When we produce sounds , the articulators join to form a restriction of complete closure and then come apart slowly into the fricative position . 4 . When we produce sounds , the velum must be lowered and there must be a restriction of complete closure somewhere in the mouth so that the air escapes through the nose . 5 . A sound is produced with the tip of the tongue in contact with the upper teeth ridge , allowing the air to escape on both sides or on one side of the mouth . 6 . An sound is produced when the articulators come close together , but do not produce any friction .